Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SYSTEM AND METHOD FOR PHASE TRACKING REFERENCE SIGNAL DYNAMIC PRESENCE IN ULTRA-RELIABLE AND LOW-LATENCY AND PORT INDICATION
Document Type and Number:
WIPO Patent Application WO/2020/146543
Kind Code:
A2
Abstract:
A user equipment wireless communication device in a wireless communication environment receives a signal from the network that includes a radio network temporary ID. From the radio network temporary ID, the user equipment is capable of determining whether a phase tracking reference signal is present based on the radio network temporary ID. If any of these are identified by the radio network temporary ID, then the user equipment determines that a phase tracking reference signal is present. After the user equipment has determined that the phase tracking reference signal is present, the user equipment can then determine which phase tracking reference signal antenna ports are to be used based on the values of the transmitted precoding matrix indicator value and the transmit rank indicator.

Inventors:
ZHANG YUSHU (CN)
XIONG GANG (US)
ZHANG YUJIAN (CN)
WANG GUOTONG (CN)
Application Number:
PCT/US2020/012800
Publication Date:
July 16, 2020
Filing Date:
January 08, 2020
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
APPLE INC (US)
International Classes:
H04L1/00; H04B7/02; H04L5/00
Attorney, Agent or Firm:
HELVEY, Jeffrey T. et al. (US)
Download PDF:
Claims:
CLAIMS

1. A device for use in a wireless communication environment, comprising:

radio front end circuitry; and

one or more processors coupled to the radio front end circuitry configured to: receive a signal that includes a radio network temporary identification

(ID);

determine whether a phase tracking reference signal is present based on the radio network temporary ID;

select a modulation and coding scheme table based on the determining; and

perform wireless communications, via the front end circuitry, using the selected modulation and coding scheme table.

2. The device of claim 1, wherein the one or more processors are further configured to

determine that a phase tracking reference signal is present in response to determining that the radio network temporary ID is one of C-RNTI, CS-RNTI, SP-CSI-RNTI, or MCS-C- RNTI.

3. The device of claim 1, wherein the one or more processors are further configured to

determine a number of phase tracking reference signal antenna ports to be used.

4. The device of claim 3, wherein the one or more processors are further configured to

determine whether to use codebook or non-codebook based transmission based on the received signal.

5. The device of claim 4, wherein the received signal further includes a transmitted

precoding matrix indicator and a transmit rank indicator, and

wherein in response to determining to use codebook based transmission, the one or more processors are further configured to set a number of phase tracking reference signal antenna ports to be either one port or two ports depending on values of the transmitted precoding matrix indicator and the transmit rank indicator. 6. The device of claim 5, wherein the one or more processors are further configured to set the number of phase tracking reference signal antenna ports to be two in response to the value of the transmitted precoding matrix indicator value being zero and the value of the transmit rank indicator being one.

7. The device of claim 6, wherein the one or more processors are further configured to set the number of phase tracking reference signal antenna ports to be one for all other values of the transmitted precoding matrix indicator and transmit rank indicator.

8. A device for use in a wireless communication environment, comprising:

one or more processors configured to:

receive a signal from a next generation nodeB;

determine, from the received signal, a number of uplink phase tracking reference signal ports; and

receiving phase tracking reference signal information using at least one of the determined ports.

9. The device of claim 8, wherein the one or more processors are further configured to:

receive a reporting from the next generation nodeB of a number of phase tracking reference signal ports; and

determine that a maximum number of phase tracking reference signal ports are smaller than the reported number of phase tracking reference signal ports.

10. The device of claim 8, wherein the one or more processors are further configured to:

receive a reporting from the next generation nodeB of a number of phase tracking reference signal ports;

determine that phase tracking reference signal is enabled; and

set a maximum number of phase tracking reference signal ports to be equal to the reported number of phase tracking reference signal ports. 11. The device of claim 8, wherein the one or more processors are further configured to determine whether an association is set between a phase tracking reference signal port and a demodulation reference signal port for a grant based transmission.

12. The device of claim 11, wherein the one or more processors are further configured to, in response to determining that there is no association, set a default association between the phase tracking reference signal port and the demodulation reference signal port.

13. The device of claim 12, wherein the default association is based on a default value of a phase tracking reference signal and demodulation reference signal association index.

14. A method of identifying a phase tracking reference signal antenna port in a wireless communication device, comprising:

receiving a signal that includes a radio network temporary identification (ID); determining whether a phase tracking reference signal is present based on the radio network temporary ID;

selecting a modulation and coding scheme table based on the determining; and performing or causing to perform wireless communications, using the selected modulation and coding scheme table.

15. The method of claim 14, wherein the determining determines that a phase tracking

reference signal is present in response to determining that the radio network temporary ID is one of C-RNTI, CS-RNTI, SP-CSI-RNTI, or MCS-C-RNTI.

16. The method of claim 14, further comprising determining a number of phase tracking reference signal antenna ports to be used.

17. The method of claim 16, further comprising determining whether to use codebook or non codebook based transmission based on the received signal. 18. The method of claim 17, wherein the received signal further includes a transmitted precoding matrix indicator and a transmit rank indicator, the method further comprises: in response to determining to use codebook based transmission, setting a number of phase tracking reference signal antenna ports to be either one port or two ports depending on values of the transmitted precoding matrix indicator and the transmit rank indicator.

19. The method of claim 18, further comprising setting the number of phase tracking

reference signal antenna ports to be two in response to the value of the transmitted precoding matrix indicator value being zero and the value of the transmit rank indicator being one.

20. The method of claim 19, further comprising setting the number of phase tracking

reference signal antenna ports to be one for all other values of the transmitted precoding matrix indicator and transmit rank indicator.

Description:
SYSTEM AND METHOD FOR PHASE TRACKING REFERENCE SIGNAL DYNAMIC PRESENCE IN ULTRA-RELIABLE AND LOW-LATENCY AND

PORT INDICATION

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to PCT application number PCT/CN2019/071188, filed in the Chinese Intellectual Property Office on January 10, 2019, which is hereby incorporated by reference in its entirety.

FIELD

[0002] The field of this disclosure relates generally to identifying a presence of a phase tracking reference signal and determining ports in a wireless communication system.

BACKGROUND

[0003] The 3rd Generation Partnership Project (3GPP) unites telecommunications

standard development organizations (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC), known as“Organizational Partners” and provides their members with a stable

environment to produce the Reports and Specifications that define 3 GPP technologies. The project covers cellular telecommunications technologies, including radio access, core network and service capabilities, which provide a complete system description for mobile telecommunications. In Release 15 of 3GPP, Radio Network Temporary ID (RNTI) is used to scramble the Downlink Control Information (DO) or to determine the Cyclic Redundant Code (CRC) mask for the PDCCH or configured in configured-grant based transmi ssion. Also in Release 15, a phase tracking reference signal (PT-RS) can be present for enhanced mobile broadband (eMBB) when the RNTI equals to a C-RNTI, CS- RNTI or SP-CSI-RNTI. However, in ultra-reliable and low-latency (URLLC)— a set of features that provide low latency and ultra-high reliability for mission critical applications such as industrial internet, smart grids, remote surgery and intelligent transportation systems— a new type of RNTI may be used to determine which MCS table to use (e.g., “MCS-C-RNTI” or“U-C-RNTI”). SUMMARY

[0004] A user equipment wireless communication device in a wireless communication environment receives a signal from the network that includes a radio network temporary ID. From the radio network temporary identification (ID), the user equipment is capable of determining whether a phase tracking reference signal is present. Specifically, the user equipment determines whether the radio network temporary ID is one of C-RNTI, CS- RNTI, SP-CSI-RNTI, or MCS-C-RNTI. If any of these are identified by the radio network temporary ID, then the user equipment determines that a phase tracking reference signal is present.

[0005] After the user equipment has determined that the phase tracking reference signal is present, the user equipment can then determine which phase tracking reference signal antenna ports are to be used. First, the user equipment determines whether codebook or non-codebook based transmissions are to be used. When it is determined that codebook transmission are to be used, the user equipment sets the number of ports to be two when the value of the transmitted precoding matrix indicator value is zero and the value of the transmit rank indicator is one. For all other values, the user equipment sets the number of ports to be one.

[0006] In an embodiment, a device is disclosed for use in a wireless communication

environment. The device includes one or more processors that are configured to carry out a modulation and port selection scheme of the device. Specifically, the processors receive a signal that includes a radio network temporary ID. The processors then determine whether a phase tracking reference signal is present based on the radio network temporary ID. Based on this information, the processors select a modulation and coding scheme table that can further be used for wireless communications via radio front end circuitry.

[0007] In another embodiment, a device is disclosed for use in a wireless communication environment. The device includes one or more processors configured to receive a signal from a next generation nodeB. The device determines, from the received signal, a number of uplink phase tracking reference signal ports to be used. The processors then transmit phase tracking reference signal information via the determined ports.

[0008] In another embodiment, a method is disclosed for identifying phase tracking

reference signal antenna ports in a wireless communication device. In the method, a signal is received that includes a radio network temporary ID. It is then determined whether a phase tracking reference signal is present based on the radio network temporary ID. From this information, a modulation and coding scheme table are selected.

[0009] In embodiments, the processors are further configured to determine whether

codebook or non-codebook transmission is to be used. In embodiments, the received signal includes a transmitted precoding matrix indicator and a transmit rank indicator, and the processors are further configured to set a number of phase tracking reference signal antenna ports to be either one port or two ports depending on the values of the transmitted precoding matrix indicator and the transmit rank indicator. In embodiments, the processors set the phase tracking reference signal antenna ports to be two in response to the value of the transmitted precoding matrix indicator value being zero and the value of the transmit rank indicator being one. In embodiments, the processors set the number of ports to be one for all other values.

BRIEF DESCRIPTION OF THE FIGURES

[0010] Figure 1 illustrates a procedure to determine dynamic presence of PT-RS for

URLLC when enabled in accordance with some embodiments.

[0011] Figure 2 illustrates a procedure for determining a number of PT-RS antenna ports for two-port uplink codebook based transmission when a maximum number of PT-RS ports is two in accordance with some embodiments.

[0012] Figure 3 depicts an architecture of a system of a network in accordance with

some embodiments.

[0013] Figure 4 depicts an architecture of a system including a first core network in

accordance with some embodiments.

[0014] Figure 5 depicts an architecture of a system including a second core network in accordance with some embodiments.

[0015] Figure 6 depicts an example of infrastructure equipment in accordance with

various embodiments.

[0016] Figure 7 depicts example components of a computer platform in accordance with various embodiments

[0017] Figure 8 depicts example components of baseband circuitry and radio frequency circuitry in accordance with various embodiments. [0018] Figure 9 is an illustration of various protocol functions that may be used for various protocol stacks in accordance with various embodiments.

[0019] Figure 10 illustrates components of a core network in accordance with various embodiments.

[0020] Figure 11 is a block diagram illustrating components, according to some example embodiments, of a system to support NFV.

[0021] Figure 12 is a block diagram illustrating components, according to some

example embodiments, able to read instructions from a machine-readable or computer- readable medium (e g., a non-transitory machine-readable storage medium) and perform any one or more of the methodologies discussed herein.

[0022] Figure 13 illustrates a flowchart diagram of a method for determining a presence or absence of a phase tracking reference signal and a number of phase tracking reference signal antenna ports to be used.

DETAILED DESCRIPTION

[0023] The following detailed description refers to the accompanying drawings. The same reference numbers may be used in different drawings to identify the same or similar elements. In the following descripti on, for purposes of explanation and not limitation, specific details are set forth such as particular structures, architectures, interfaces, techniques, etc. in order to provide a thorough understanding of the various aspects of various embodiments. However, it will be apparent to those skilled in the art having the benefit of the present disclosure that the various aspects of the various embodiments may be practiced in other examples that depart from these specific details. In certain instances, descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the vari ous embodiments with unnecessary detail. For the purposes of the present document, the phrase“A or B” means (A), (B), or (A and B).

[0024] In Rel-15, phase tracking reference signal (PT-RS) can be present for eMBB when

Radio Network Temporary ID (RNTI), which is used to scramble the Downlink Control Information (DCI) or to determine the Cyclic Redundant Code (CRC) mask for the PDCCH or configured in configured-grant based transmission, equals to a C-RNTI, CS- RNTI or SP-CSI-RNTI. [1] [2] However in URLLC, there could be a new type of RNTI, which is used to determine which MCS table should be used. This RNTI may be called as “MCS-C-RNTI” or“U-C-RNTF. In this IDF, it is called as“MCS-C-RNTI”. Then whether PT-RS should be dynamically present when MCS-C-RNTI is used could be one issue.

[0025] In addition, for uplink non-codebook based transmission, the PT-RS port index is configured per SRS resource, and a UE can be configured with up to 4 SRS resources and 1 SRS resource set. But to support uplink multi-panel transmission, more SRS resource sets may be configured, which can be used for one panel. Then how to configure the PT- RS port index when multiple SRS resource sets for non-codebook based transmission is configured could be one issue.

[0026] Further, for uplink codebook based transmission, the number of PT-RS port is determined by the precoder. For 4-port transmission, it has been defined that one PT-RS port is associated with SRS port 0 and 2 and another PT-RS port is associated with SRS port 1 and 3, when 2 PT-RS antenna port is configured. If any of the port is non-zero- power (NZP), corresponding PT-RS port will be present. However, for 2-port transmission, how to determine the number of PT-RS port could be another issue.

[0027] In this disclosure, some methods to determine the dynamic presence of PT-RS for

URLLC and to indicate the number of PT-RS antenna ports (APs) for codebook and non codebook based transmission are disclosed, including:

• Dynamic presence of PT-RS when MCS-C-RNTI is scheduled

• PT-RS port index indication when multiple SRS resource sets is configured

• PT-RS port determination for 2-port transmission

Dynamic Presence of PT-RS in URLLC

[0028] In URLLC, MCS-C-RNTI may be used to scramble the DC I, which implies a

MCS table for 64QAM with low spectrum efficiency.

[0029] In an embodiment, when MCS-C-RNTI is used to scramble DCI, the PT-RS can be dynamically present if configured. In one example, the following can be specified. Alternatively, PT-RS may not be present if RNTI equals to MCS-C-RNTI.

[0030] If a UE is not configured with the higher layer parameter phase TrackingRS in

DMRS-UplinkConfig, the UE shall not transmit PT-RS. The PTRS may only be present if RNTI equals C-RNTI, CS-RNTI, SP-CSI-RNTI or MCS-C-RNTI. [0031] If a UE is configured with the higher layer parameter phase TrackingRS in DMRS- Dow nlinkConfig,

the higher layer parameters timeDensity and frequencyDensity in PTRS- DownlinkConfig indicate the threshold values ptrs-MCS, i= 1,2,3 and N RB , i= 0,1, as shown in Table 5.1.6.3-1 and Table 5.1.6.3-2, respectively

if either or both of the additional higher layer parameters timeDensity and frequencyDensity are configured, and the RNTI equals C-RNTI or CS-RNTI or MCS-C-RNTI, the UE shall assume the PT-RS antenna ports' presence and pattern are a function of the corresponding scheduled MCS of the corresponding codeword and scheduled bandwidth in corresponding bandwidth part as shown in Table 5.1.6.3-1 and Table 5.1.6.3-2,

if the higher layer parameter timeDensity given by PTRS-DownlinkConfig is not configured, the UE shall assume L PT -RS = 1.

if the higher layer parameter frequencyDensity given by PTRS-DownlinkConfig is not configured, the UE shall assume K PT .RS = 2.

otherwise, if neither of the additional higher layer parameters timeDensity and frequencyDensity are configured and the RNTI equals C-RNTI or CS-RNTI or MCS-C-RNTI, the UE shall assume the PT-RS is present with L PT -RS = 1, K PT -RS = 2

[0032] Figure 1 illustrates the procedure 100 to determine the dynamic presence of PT- RS for URLLC when PT-RS is enabled. For example, as shown in figure 1, the UE reads the RNTI value and decides its type (110). The UE then checks whether the RNTI type is one of a select number of RNTI types (115). Specifically, if it is C-RNTI, CS-RNTI, SP- CSI-RNTI or MCS-C-RNTI (115-yes), then the UE determines that PT-RS may be present (120). Otherwise (115-no), the UE determins that PT-RS may not be present (130).

PT-RS port indication/determination

[0033] In some embodiments, for codebook based transmission, when a number of SRS antenna ports for the indicated SRS resource is configured to be 2 or less than 2, single PT-RS port may be used. Alternatively, for 2 SRS ports case, number of PT-RS ports can be determined by the indicated TPMI and TRI: if TRIM and TPMI=0 is indicated, which is used for non-coherent based transmission with both antenna ports, two PT-RS ports is used; otherwise, single PT-RS port is used. [0034] Figure 2 illustrates the procedure 200 to determine number of PT-RS antenna ports for 2 port case when codebook based transmission scheme is configured and maximum number of PT-RS ports is 2. As shown in figure 2, the UE reads the TRI and TPMI from the received signal (210). The UE then checks the values of the TRI and TPMI (215). If TRIM and TPMI=0 (215-yes), then the UE sets the number of PT-RS ports to be 2. Otherwise (215 -no), it sets the number of PT-RS ports to be 1.

[0035] Further if maximum number of PT-RS ports is smaller than that UE reported, UE shall expect that gNB should not indicate corresponding precoder that requires more PT- RS ports based on the number of PT-RS antenna ports it reported. Alternatively LIE shall expect that the maximum number of PT-RS ports should be equal to that UE reported if PT-RS is enabled.

[0036] Further, when DCI format 0_0 is used to schedule an uplink transmission, single

PT-RS port shall be used, and the PT-RS is associated with the Demodulation Reference Signal (DMRS) port.

[0037] In another embodiment, UE shall expect the PT-RS port index configured in each

SRS resources in a resource set for non-codebook based transmission should be the same. Then to support multi-panel transmission, gNB can configure multiple SRS resource sets, where each resource set can be associated with one UE antenna panel.

[0038] In another embodiment, for configured grant based transmission, where the uplink grant is configured by RRC si gnaling instead of Downlink Control Information (DCI), if the PT-RS and DMRS port association is not configured but PT-RS is enabled, UE shall assume a default association between PT-RS port and DMRS port. The default association could be based on a default value of the PTRS-DMRS association indication as shown in Table 1 and Table 2. In one example, the default value could be 0, which indicates when single PT-RS port is configured, PT-RS is associated with the first scheduled DMRS port, and when two PT-RS ports are configured, the first PT-RS port is associated with the first DMRS port which shares PT-RS port 0 and the second PT-RS port is associated with the second DMRS port which shares PT-RS port 1. Table 1: PTRS-DMRS association for UL PTRS port 0

Table 2: PTRS-DMRS association for UL PTRS ports 0 and 1

[0039] In another option, for configured grant based transmission, if the PT-RS and

DMRS port association is not configured but PT-RS is enabled, UE shall not transmit PT RS. In yet another option, for configured grant based transmission, if PT-RS is enabled, UE shall expect the PT-RS and DMRS port association should be configured.

[0040] Figure 13 illustrates a method 1300 for determining a presence or absence of a phase tracking reference signal and a number of phase tracking reference signal antenna ports to be used. As shown in figure 13, the method begins with the user equipment receiving a signal (1310). The received signal includes a radio network temporary ID, a transmitted precoding matrix indicator, and a transmit rank indicator. The UE then checks a value of the radio network temporary ID (1320). The UE then determines whether the radio network temporary ID is one of a select number of IDs (1325), including C-RNTI, CS-RNTI, SP-CSI-RNTI, or MCS-C-RNTI. In embodiments, the steps and processes can be performed using any one of applicaton circuitry 605 or 705, baseband circuitry 610 or 710, or any of processors 1214.

[0041] If the radio network temporary ID is not one of the select number of RNTIs

(1325-N), then the UE determines that the phase tracking reference signal is not present (1330), and the method ends (1370). If, on the other hand, the UE determines that the radio network temporary ID is one of the select number of RNTIs (1325-Y), the UE determines that the phase tracking reference signal is present. Based on the phase tracking reference signal, the UE selects a modulation and coding scheme table to be used in wireless communications, and then performs wireless communications via radio front end circuitry using the selected modulation and coding scheme table. The UE then

determines a number of phase tracking reference signal antenna ports to be used (1335- 1360).

[0042] The UE determines whether codebook or non-codebook based transmissions are to be used, as illustrated atl335. If non-codebook (1335-N), then the UE sets the number of ports based on an SRS resource (1340). On the other hand, if the UE determines that codebook based transmissions are to be used (1335-Y), the UE checks the values of the transmitted precoding matrix indicator and the transmit rank indicator (1350). The UE then sets the number of ports based on these values (1360). Specifically if the value of the transmitted precoding matrix indicator value is zero and the value of the transmit rank indicator is one, then the UE sets the number of ports to be two. For all other

combinations of values, the UE sets the number of ports to be one. The method then ends (1370).

Systems and Implementations

[0043] Figure 3 illustrates an example architecture of a system 3300 of a network, in

accordance with various embodiments. The following description is provided for an example system 300 that operates in conjunction with the LIE system standards and 5G or NR system standards as provided by 3 GPP technical specifications. However, the example embodiments are not limited in this regard and the described embodiments may apply to other networks that benefit from the principles described herein, such as future 3 GPP systems (e g., Sixth Generation (6G)) systems, IEEE 802.16 protocols (e.g ,

WMAN, WiMAX, etc.), or the like.

[0044] As shown by Figure 3, the system 300 includes UE 301a and UE 301b

(collectively referred to as“UEs 301” or“UE 301”). In this example, UEs 301 are illustrated as smartphones (e.g., handheld touchscreen mobile computing devices connectable to one or more cellular networks), but may also comprise any mobile or non- mobile computing device, such as consumer electronics devices, cellular phones, smartphones, feature phones, tablet computers, wearable computer devices, personal digital assistants (PDAs), pagers, wireless handsets, desktop computers, laptop computers, in-vehicle infotainment (IVI), in-car entertainment (ICE) devices, an Instrument Cluster (IC), head-up display (HUD) devices, onboard diagnostic (OBD) devices, dashtop mobile equipment (DME), mobile data terminals (MDTs), Electronic Engine Management System (EEMS), electronic/engine control units (ECUs), electronic/engine control modules (ECMs), embedded systems, microcontrollers, control modules, engine management systems (EMS), networked or“smart” appliances, MTC devices, M2M, loT devices, and/or the like.

[0045] In some embodiments, any of the UEs 301 may be IoT UEs, which may comprise a network access layer designed for low-power IoT applications utilizing short-lived UE connections. An IoT UE can utilize technologies such as M2M or MTC for exchanging data with an MTC server or device via a PLMN, ProSe or D2D communication, sensor networks, or IoT networks. The M2M or MTC exchange of data may be a machine- initiated exchange of data. An IoT network describes interconnecting IoT UEs, which may include uniquely identifiable embedded computing devices (within the Internet infrastructure), with short-lived connections. The IoT UEs may execute background applications (e.g., keep-alive messages, status updates, etc.) to facilitate the connections of the IoT network.

[0046] The UEs 301 may be configured to connect, for example, communicatively couple, with an or RAN 310. In embodiments, the RAN 310 may be an NG RAN or a 5G RAN, an E-UTRAN, or a legacy RAN, such as a UTRAN or GERAN. As used herein, the term “NG RAN” or the like may refer to a RAN 310 that operates in an NR or 5G system 300, and the term“E-UTRAN” or the like may refer to a RAN 310 that operates in an LTE or 4G system 300. The UEs 301 utilize connections (or channels) 303 and 304, respectively, each of which comprises a physical communications interface or layer (discussed in further detail below).

[0047] In this example, the connections 303 and 304 are illustrated as an air interface to enable communicative coupling, and can be consistent with cellular communications protocols, such as a GSM protocol, a CDMA network protocol, a PTT protocol, a POC protocol, a UMTS protocol, a 3 GPP LTE protocol, a 5G protocol, a NR protocol, and/or any of the other communications protocols discussed herein. In embodiments, the UEs 301 may directly exchange communication data via a ProSe interface 305. The ProSe interface 305 may alternatively be referred to as a SL interface 305 and may comprise one or more logical channels, including but not limited to a PSCCH, a PSSCH, a PSDCH, and a PSBCH.

[0048] The UE 301b is shown to be configured to access an AP 306 (also referred to as

“WLAN node 306,”“WLAN 306,”“WLAN Termination 306,”“WT 306” or the like) via connection 307. The connection 307 can comprise a local wireless connection, such as a connection consistent with any IEEE 802.11 protocol, wherein the AP 306 would comprise a wireless fidelity (Wi-Fi®) router. In this example, the AP 306 is shown to be connected to the Internet without connecting to the core network of the wireless system (described in further detail below). In various embodiments, the UE 301b, RAN 310, and AP 306 may be configured to utilize LWA operation and/or LWIP operation. The LWA operation may involve the UE 301b in RRC CONNECTED being configured by a RAN node 31 la-b to utilize radio resources of LTE and WLAN. LWIP operation may involve the UE 301b using WLAN radio resources (e.g., connection 307) via IPsec protocol tunneling to authenticate and encrypt packets (e.g., IP packets) sent over the connection 307. IPsec tunneling may include encapsulating the entirety of original IP packets and adding a new packet header, thereby protecting the original header of the IP packets.

[0049] The RAN 310 can include one or more AN nodes or RAN nodes 311a and 311b

(collectively referred to as“RAN nodes 311” or“RAN node 311”) that enable the connections 303 and 304. As used herein, the terms“access node,”“access point,” or the like may describe equipment that provides the radio baseband functions for data and/or voice connectivity between a network and one or more users. These access nodes can be referred to as BS, gNBs, RAN nodes, eNBs, NodeBs, RSUs, TRxPs or TRPs, and so forth, and can comprise ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell). As used herein, the term“NG RAN node” or the like may refer to a RAN node 311 that operates in an NR or 5G system 300 (for example, a gNB), and the term“E-UTRAN node” or the like may refer to a RAN node 311 that operates in an LTE or 4G system 300 (e.g., an eNB). According to various embodiments, the RAN nodes 311 may be implemented as one or more of a dedicated physical device such as a macrocell base station, and/or a low power (LP) base station for providing femtocells, picocells or other like cells having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells. [0050] In some embodiments, all or parts of the RAN nodes 311 may be implemented as one or more software entities running on server computers as part of a virtual network, which may be referred to as a CRAN and/or a virtual baseband unit pool (vBBUP). In these embodiments, the CRAN or vBBUP may implement a RAN function split, such as a PDCP split wherein RRC and PDCP layers are operated by the CRAN/vBBUP and other L2 protocol entities are operated by individual RAN nodes 311; a MAC/PHY split wherein RRC, PDCP, RLC, and MAC layers are operated by the CRAN/vBBUP and the PHY layer is operated by individual RAN nodes 311; or a“lower PHY” split wherein RRC, PDCP, RLC, MAC l ayers and upper portions of the PHY layer are operated by the CRAN/vBBUP and lower portions of the PHY layer are operated by individual RAN nodes 311. This virtualized framework allows the freed-up processor cores of the RAN nodes 311 to perform other virtualized applications. In some implementations, an individual RAN node 311 may represent individual gNB-DUs that are connected to a gNB-CU via individual FI interfaces (not shown by Figure 3). In these implementations, the gNB-DUs may include one or more remote radio heads or RFEMs (see, e.g., Figure 6), and the gNB-CU may be operated by a server that is located in the RAN 310 (not shown) or by a server pool in a similar manner as the CRAN/vBBUP. Additionally or

alternatively, one or more of the RAN nodes 311 may be next generation eNBs (ng- eNBs), which are RAN nodes that provide E-UTRA user plane and control plane protocol terminations toward the UEs 301, and are connected to a 5GC (e.g., CN 520 of Figure 5) via an NG interface (discussed infra).

[0051] In V2X scenarios one or more of the RAN nodes 311 may be or act as RSUs. The term“Road Side Unit” or“RSU” may refer to any transportation infrastructure entity used for V2X communications. An RSU may be implemented in or by a suitable RAN node or a stationary (or relatively stationary) UE, where an RSU implemented in or by a UE may be referred to as a“UE-type RSU,” an RSU implemented in or by an eNB may be referred to as an“eNB-type RSU,” an RSU implemented in or by a gNB may be referred to as a“gNB -type RSU,” and the like. In one example, an RSU is a computing device coupled with radio frequency circuitry located on a roadside that provides connectivity support to passing vehicle UEs 301 (vUEs 301). The RSU may also include internal data storage circuitry to store intersection map geometry, traffic statistics, media, as well as applications/software to sense and control ongoing vehicular and pedestrian traffic. The RSU may operate on the 5.9 GHz Direct Short Range Communications (DSRC) band to provide very low latency communications required for high speed events, such as crash avoidance, traffic warnings, and the like. Additionally or alternatively, the RSU may operate on the cellular V2X band to provide the aforementioned low latency communications, as well as other cellular communications services. Additionally or alternatively, the RSU may operate as a Wi-Fi hotspot (2.4 GHz band) and/or provide connectivity to one or more cellular networks to provide uplink and downlink

communications. The computing device(s) and some or all of the radiofrequency circuitry of the RSU may be packaged in a weatherproof enclosure suitable for outdoor install ation, and may include a network interface controller to provide a wired connection (e.g., Ethernet) to a traffic signal controller and/or a backhaul network.

[0052] Any of the RAN nodes 311 can terminate the air interface protocol and can be the first point of contact for the UEs 301. In some embodiments, any of the RAN nodes 311 can fulfill various logical functions for the RAN 310 including, but not limited to, radio network controller (RNC) functions such as radio bearer management, uplink and downlink dynamic radio resource management and data packet scheduling, and mobility management.

[0053] In embodiments, the UEs 301 can be configured to communicate using OFDM

communication signals with each other or with any of the RAN nodes 311 over a multi carrier communication channel in accordance with various communication techniques, such as, but not limited to, an OFDMA communication technique (e.g., for downlink communications) or a SC-FDMA communication technique (e.g., for uplink and ProSe or si delink communications), although the scope of the embodiments is not limited in this respect. The OFDM signals can comprise a plurality of orthogonal sub carriers.

[0054] In some embodiments, a downlink resource grid can be used for downlink

transmissions from any of the RAN nodes 311 to the UEs 301, while uplink transmissions can utilize similar techniques. The grid can be a time-frequency grid, called a resource grid or time-frequency resource grid, which is the physical resource in the downlink in each slot. Such a time-frequency plane representation is a common practice for OFDM systems, which makes it intuitive for radio resource allocation. Each column and each row of the resource grid corresponds to one OFDM symbol and one OFDM subcarrier, respectively. The duration of the resource grid in the time domain corresponds to one slot in a radio frame. The smallest time-frequency unit in a resource grid is denoted as a resource element. Each resource grid comprises a number of resource blocks, which describe the mapping of certain physical channels to resource elements. Each resource block comprises a collection of resource elements; in the frequency domain, this may represent the smallest quantity of resources that currently can be allocated. There are several different physical downlink channels that are conveyed using such resource blocks.

[0055] According to various embodiments, the UEs 301, 302 and the RAN nodes 311, 312 communicate data (for example, transmit and receive) data over a licensed medium (also referred to as the“licensed spectrum” and/or the“licensed band”) and an unlicensed shared medium (also referred to as the“unlicensed spectrum” and/or the“unlicensed band”). The licensed spectrum may include channels that operate in the frequency range of approximately 400 MHz to approximately 3.8 GHz, whereas the unlicensed spectrum may include the 5 GHz band.

[0056] To operate in the unlicensed spectrum, the UEs 301, 302 and the RAN nodes 311, 312 may operate using LAA, eLAA, and/or feLAA mechanisms. In these

implementations, the UEs 301, 302 and the RAN nodes 311, 312 may perform one or more known medium-sensing operations and/or carrier-sensing operations in order to determine whether one or more channels in the unlicensed spectrum is unavailable or otherwise occupied prior to transmitting in the unlicensed spectrum. The medium/carrier sensing operations may be performed according to a listen-before-talk (LBT) protocol.

[0057] LBT is a mechanism whereby equipment (for example, UEs 301, 302, RAN nodes 311, 312, etc.) senses a medium (for example, a channel or carrier frequency) and transmits when the medium is sensed to be idle (or when a specific channel in the medium is sensed to be unoccupied). The medium sensing operation may include CCA, which utilizes at least ED to determine the presence or absence of other signals on a channel in order to determine if a channel is occupied or clear. This LBT mechanism allows cellular/LAA networks to coexist with incumbent systems in the unlicensed spectrum and with other LAA networks. ED may include sensing RE energy across an intended transmission band for a period of time and comparing the sensed RF energy to a predefined or configured threshold. [0058] Typically, the incumbent systems in the 5 GHz band are WLANs based on IEEE 802.11 technologies. WLAN employs a contention-based channel access mechanism, called CSMA/CA. Here, when a WLAN node (e.g., a mobile station (MS) such as UE 301 or 302, AP 306, or the like) intends to transmit, the WLAN node may first perform CCA before transmission. Additionally, a backoff mechanism is used to avoid collisions in situations where more than one WLAN node senses the channel as idle and transmits at the same time. The backoff mechanism may be a counter that is drawn randomly within the CWS, which is increased exponentially upon the occurrence of collision and reset to a minimum value when the transmission succeeds. The LBT mechanism designed for LAA is somewhat similar to the CSMA/CA of WLAN. In some implementations, the LBT procedure for DL or UL transmi ssion bursts including PDSCH or PUSCH transmi ssions, respectively, may have an LAA contention window that is variable in length between X and Y ECCA slots, where X and Y are minimum and maximum values for the CWSs for LAA. In one example, the minimum CWS for an LAA transmission may be 9

microseconds (ps); however, the size of the CWS and a MCOT (for example, a transmission burst) may be based on governmental regulatory requirements.

[0059] The LAA mechanisms are built upon CA technologies of LTE- Advanced systems.

In CA, each aggregated carrier is referred to as a CC. A CC may have a bandwidth of 1.4, 3, 5, 10, 15 or 20 MHz and a maximum of five CCs can be aggregated, and therefore, a maximum aggregated bandwidth is 100 MHz. In FDD systems, the number of aggregated carriers can be different for DL and UL, where the number of UL CCs is equal to or lower than the number of DL component carriers. In some cases, individual CCs can have a different bandwidth than other CCs. In TDD systems, the number of CCs as well as the bandwidths of each CC is usually the same for DL and UL.

[0060] CA also comprises individual serving cells to provide individual CCs. The

coverage of the serving cells may differ, for example, because CCs on different frequency bands will experience different pathloss. A primary service cell or PCell may provide a PCC for both UL and DL, and may handle RRC and NAS related activities. The other serving cells are referred to as SCells, and each SCell may provide an individual SCC for both UL and DL. The SCCs may be added and removed as required, while changing the PCC may require the UE 301, 302 to undergo a handover. In LAA, eLAA, and feLAA, some or all of the SCells may operate in the unlicensed spectrum (referred to as“LAA SCells”), and the LAA SCells are assisted by a PCell operating in the licensed spectrum. When a UE is configured with more than one LAA SCell, the UE may receive UL grants on the configured LAA SCells indicating different PUSCH starting positions within a same subframe.

[0061] The PDSCH carries user data and higher-layer signaling to the UEs 301. The

PDCCH carries information about the transport format and resource allocations related to the PDSCH channel, among other things. It may also inform the UEs 301 about the transport format, resource allocation, and HARQ information related to the uplink shared channel. Typically, downlink scheduling (assigning control and shared channel resource blocks to the UE 301b within a cell) may be performed at any of the RAN nodes 311 based on channel quality information fed back from any of the UEs 301. The downlink resource assignment information may be sent on the PDCCH used for (e.g., assigned to) each of the UEs 301.

[0062] The PDCCH uses CCEs to convey the control information. Before being mapped to resource elements, the PDCCH complex-valued symbols may first be organized into quadruplets, which may then be permuted using a sub -block interleaver for rate matching. Each PDCCH may be transmitted using one or more of these CCEs, where each CCE may correspond to nine sets of four physical resource elements known as REGs. Four Quadrature Phase Shift Keying (QPSK) symbols may be mapped to each REG. The PDCCH can be transmitted using one or more CCEs, depending on the size of the DCI and the channel condition. There can be four or more different PDCCH formats defined in LTE with different numbers of CCEs (e.g., aggregation level, L=l, 2, 4, or 8).

[0063] Some embodiments may use concepts for resource allocation for control channel information that are an extension of the above-described concepts. For example, some embodiments may utilize an EPDCCH that uses PDSCH resources for control

information transmission. The EPDCCH may be transmitted using one or more ECCEs. Similar to above, each ECCE may correspond to nine sets of four physical resource elements known as an EREGs. An ECCE may have other numbers of EREGs in some situations.

[0064] The RAN nodes 311 may be configured to communicate with one another via interface 312. In embodiments where the system 300 is an LTE system (e.g., when CN 320 is an EPC 420 as in Figure 4), the interface 312 may be an X2 interface 312. The X2 interface may be defined between two or more RAN nodes 311 (e.g., two or more eNBs and the like) that connect to EPC 320, and/or between two eNBs connecting to EPC 320.

In some implementations, the X2 interface may include an X2 user plane interface (X2-U) and an X2 control plane interface (X2-C). The X2-U may provide flow control

mechanisms for user data packets transferred over the X2 interface, and may be used to communicate information about the delivery of user data between eNBs. For example, the X2-U may provide specific sequence number information for user data transferred from a MeNB to an SeNB; information about successful in sequence delivery of PDCP PDUs to a UE 301 from an SeNB for user data; information of PDCP PDUs that were not delivered to a UE 301; information about a current minimum desired buffer size at the SeNB for transmitting to the UE user data; and the like. The X2-C may provide intra-LTE access mobility functionality, including context transfers from source to target eNBs, user plane transport control, etc.; load management functionality; as well as inter-cell interference coordination functionality.

[0065] In embodiments where the system 300 is a 5G or NR system (e.g., when CN 320 is an 5GC 5 520 as in Figure 5), the interface 312 may be an Xn interface 312. The Xn interface is defined between two or more RAN nodes 311 (e.g., two or more gNBs and the like) that connect to 5GC 320, between a RAN node 311 (e.g., a gNB) connecting to 5GC 320 and an eNB, and/or between two eNBs connecting to 5GC 320. In some implementations, the Xn interface may include an Xn user plane (Xn-U) interface and an Xn control plane (Xn-C) interface. The Xn-U may provide non-guaranteed delivery' of user plane PDUs and support/provide data forwarding and flow control functionality. The Xn-C may provide management and error handling functionality, functionality to manage the Xn-C interface; mobility support for UE 301 in a connected mode (e.g., CM- CONNECTED) including functionality to manage the UE mobility for connected mode between one or more RAN nodes 311. The mobility support may include context transfer from an old (source) serving RAN node 31 1 to new (target) serving RAN node 311; and control of user plane tunnels between old (source) serving RAN node 311 to new (target) serving RAN node 311. A protocol stack of the Xn-U may include a transport network layer built on Internet Protocol (IP) transport layer, and a GTP-U layer on top of a UDP and/or IP layer(s) to carry user plane PDUs. The Xn-C protocol stack may include an application layer signaling protocol (referred to as Xn Application Protocol (Xn-AP)) and a transport network layer that is built on SCTP. The SCTP may be on top of an IP layer, and may provide the guaranteed delivery of application layer messages. In the transport IP layer, point-to-point transmission is used to deliver the signaling PDUs. In other implementations, the Xn-U protocol stack and/or the Xn-C protocol stack may be same or similar to the user plane and/or control plane protocol stack(s) shown and described herein.

[0066] The RAN 310 is shown to be communicatively coupled to a core network— in this embodiment, core network (CN) 320. The CN 320 may comprise a plurality of network elements 322, which are configured to offer various data and telecommunications services to customers/ sub scribers (e.g., users of UEs 301) who are connected to the CN 320 via the RAN 310. The components of the CN 320 may be implemented in one physical node or separate physical nodes including components to read and execute instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium). In some embodiments, NFV may be utilized to virtualize any or all of the above-described network node functions via executable instructions stored in one or more computer-readable storage mediums (described in further detail below). A logical instantiation of the CN 320 may be referred to as a network slice, and a logical instantiation of a portion of the CN 320 may be referred to as a network sub-slice. NFV architectures and infrastructures may be used to virtualize one or more network functions, alternatively performed by proprietary hardware, onto physical resources comprising a combination of industry-standard server hardware, storage hardware, or switches. In other words, NFV systems can be used to execute virtual or reconfigurable implementations of one or more EPC compon ents/ functi ons .

[0067] Generally, the application server 330 may be an element offering applications that use IP bearer resources with the core network (e.g., UMTS PS domain, LTE PS data services, etc.). The application server 330 can also be configured to support one or more communication services (e.g., VoIP sessions, PTT sessions, group communication sessions, social networking services, etc.) for the UEs 301 via the EPC 320.

[0068] In embodiments, the CN 320 may be a 5GC (referred to as“5GC 320” or the like), and the RAN 310 may be connected with the CN 320 via an NG interface 313. In embodiments, the NG interface 313 may be split into two parts, an NG user plane (NG-U) interface 314, which carries traffic data between the RAN nodes 31 1 and a UPF, and the S1 control plane (NG-C) interface 315, which is a signaling interface between the RAN nodes 311 and AMFs. Embodiments where the CN 320 is a 5GC 320 are discussed in more detail with regard to Figure 5.

[0069] In embodiments, the CN 320 may be a 5G CN (referred to as“5GC 320” or the like), while in other embodiments, the CN 320 may be an EPC). Where CN 320 is an EPC (referred to as“EPC 320” or the like), the RAN 310 may be connected with the CN 320 via an SI interface 313. In embodiments, the SI interface 313 may be split into two parts, an S 1 user plane (S 1 -U) interface 314, which carries traffic data between the RAN nodes 311 and the S-GW, and the S 1 -MME interface 315, which is a signaling interface between the RAN nodes 311 and MMEs. An example architecture wherein the CN 320 is an EPC 320 is shown by Figure 4.

[0070] Figure 4 illustrates an example architecture of a system 400 including a first CN 420, in accordance with various embodiments. In this example, system 400 may implement the LTE standard wherein the CN 420 is an EPC 420 that corresponds with CN 320 of Figure 3. Additionally, the UE 401 may be the same or similar as the UEs 301 of Figure 3, and the E-UTRAN 410 may be a RAN that is the same or similar to the RAN 310 of Figure 3, and which may include RAN nodes 311 discussed previously. The CN 420 may comprise MMEs 421, an S-GW 422, a P-GW 423, a HSS 424, and a SGSN 425.

[0071] The MMEs 421 may be similar in function to the control plane of legacy SGSN, and may implement MM functions to keep track of the current location of a UE 401. The MMEs 421 may perform various MM procedures to manage mobility aspects in access such as gateway selection and tracking area list management. MM (also referred to as “EPS MM” or“EMM” in E-UTRAN systems) may refer to all applicable procedures, methods, data storage, etc. that are used to maintain knowledge about a present location of the UE 401, provide user identity confidentiality, and/or perform other like services to users/subscribers. Each UE 401 and the MME 421 may include an MM or EMM sublayer, and an MM context may be established in the UE 401 and the MME 421 when an attach procedure is successfully completed. The MM context may be a data structure or database object that stores MM-related information of the UE 401. The MMEs 421 may be coupled with the HSS 424 via an S6a reference point, coupled with the SGSN 425 via an S3 reference point, and coupled with the S-GW 422 via an Sl l reference point. [0072] The SGSN 425 may be a node that serves the UE 401 by tracking the location of an individual UE 401 and performing security functions. In addition, the SGSN 425 may perform Inter-EPC node signaling for mobility between 2G/3G and E-UTRAN 3 GPP access networks; PDN and S-GW selection as specified by the MMEs 421; handling of UE 401 time zone functions as specified by the MMEs 421; and MME selection for handovers to E-UTRAN 3 GPP access network. The S3 reference point between the MMEs 421 and the SGSN 425 may enable user and bearer information exchange for inter-3 GPP access network mobility in idle and/or active states.

[0073] The HSS 424 may comprise a database for network users, including subscription- related information to support the network entities’ handling of communication sessions. The EPC 420 may comprise one or several HSSs 424, depending on the number of mobile subscribers, on the capacity of the equipment, on the organization of the network, etc. For example, the HSS 424 can provide support for routing/roaming, authentication, authorization, naming/addressing resolution, location dependencies, etc. An S6a reference point between the HSS 424 and the MMEs 421 may enable transfer of subscription and authentication data for authenticating/ authori zing user access to the EPC 420 between HSS 424 and the MMEs 421.

[0074] The S-GW 422 may terminate the SI interface 313 (“Sl-U” in Figure 4) toward the RAN 410, and routes data packets between the RAN 410 and the EPC 420. In addition, the S-GW 422 may be a local mobility anchor point for inter-RAN node handovers and also may provide an anchor for inter-3 GPP mobility. Other responsibilities may include lawful intercept, charging, and some policy enforcement. The SI 1 reference point between the S-GW 422 and the MMEs 421 may provide a control plane between the MMEs 421 and the S-GW 422. The S-GW 422 may be coupled with the P-GW 423 via an S5 reference point.

[0075] The P-GW 423 may terminate an SGi interface toward a PDN 430. The P-GW 423 may route data packets between the EPC 420 and external networks such as a network including the application server 330 (alternatively referred to as an“AF”) via an IP interface 325 (see e.g., Figure 3). In embodiments, the P-GW 423 may be

communicatively coupled to an application server (application server 330 of Figure 3 or PDN 430 in Figure 4) via an IP communications interface 325 (see, e.g., Figure 3). The S5 reference point between the P-GW 423 and the S-GW 422 may provide user plane tunneling and tunnel management between the P-GW 423 and the S-GW 422. The S5 reference point may also be used for S-GW 422 relocation due to UE 401 mobility and if the S-GW 422 needs to connect to a non-collocated P-GW 423 for the required PDN connectivity. The P-GW 423 may further include a node for policy enforcement and charging data collection (e.g., PCEF (not shown)). Additionally, the SGi reference point between the P-GW 423 and the packet data network (PDN) 430 may be an operator external public, a private PDN, or an intra operator packet data network, for example, for provision of IMS services. The P-GW 423 may be coupled with a PCRF 426 via a Gx reference point.

[0076] PCRF 426 is the policy and charging control element of the EPC 420. In a non roaming scenario, there may be a single PCRF 426 in the ITome Public Land Mobile Network (HPLMN) associated with a UE 401’s Internet Protocol Connectivity Access Network (IP-CAN) session. In a roaming scenario with local breakout of traffic, there may be two PCRFs associated with a UE 40 Us IP-CAN session, a Home PCRF (H-PCRF) within an HPLMN and a Visited PCRF (V-PCRF) within a Visited Public Land Mobile Network (VPLMN). The PCRF 426 may be communicatively coupled to the application server 430 via the P-GW 423. The application server 430 may signal the PCRF 426 to indicate a new service flow and select the appropriate QoS and charging parameters. The PCRF 426 may provision this rule into a PCEF (not shown) with the appropriate TFT and QCI, which commences the QoS and charging as specified by the application server 430. The Gx reference point between the PCRF 426 and the P-GW 423 may allow for the transfer of QoS policy and charging rules from the PCRF 426 to PCEF in the P-GW 423. An Rx reference point may reside between the PDN 430 (or“AF 430”) and the PCRF 426.

[0077] Figure 5 illustrates an architecture of a system 500 including a second CN 520 in accordance with various embodiments. The system 500 is shown to include a UE 501, which may be the same or similar to the UEs 301 and UE 401 discussed previously; a (R)AN 510, which may be the same or similar to the RAN 310 and RAN 410 discussed previously, and which may include RAN nodes 311 discussed previously; and a DN 503, which may be, for example, operator services, Internet access or 3rd party services; and a 5GC 520. The 5GC 520 may include an AUSF 522; an AMF 521 ; a SMF 524; a NEF 523; a PCF 526; a NRF 525; a UDM 527; an AF 528; a UPF 502; and a NSSF 529. [0078] The UPF 502 may act as an anchor point for intra-RAT and inter-RAT mobility, an external PDU session point of interconnect to DN 503, and a branching point to support multi -homed PDU session. The UPF 502 may also perform packet routing and forwarding, perform packet inspection, enforce the user plane part of policy rules, lawfully intercept packets (UP collection), perform traffic usage reporting, perform QoS handling for a user plane (e.g., packet filtering, gating, UL/DL rate enforcement), perform Uplink Traffic verification (e.g., SDF to QoS flow mapping), transport level packet marking in the uplink and downlink, and perform downlink packet buffering and downlink data notification triggering. UPF 502 may include an uplink classifier to support routing traffic flows to a data network. The DN 503 may represent various network operator services, Internet access, or third party services. DN 503 may include, or be similar to, application server 330 discussed previously. The UPF 502 may interact with the SMF 524 via an N4 reference point between the SMF 524 and the UPF 502.

[0079] The AUSF 522 may store data for authentication of UE 501 and handle

authenti cati on-rel ated functionality. The AUSF 522 may facilitate a common

authentication framework for various access types. The AUSF 522 may communicate with the AMF 521 via an N12 reference point between the AMF 521 and the AUSF 522; and may communicate with the UDM 527 via an N13 reference point between the UDM 527 and the AUSF 522. Additionally, the AUSF 522 may exhibit an Nausf service-based interface.

[0080] The AMF 521 may be responsible for registration management (e.g., for

registering UE 501, etc.), connection management, reachability management, mobility management, and lawful interception of AMF -related events, and access authentication and authorization. The AMF 521 may be a termination point for the an N11 reference point between the AMF 521 and the SMF 524. The AMF 521 may provide transport for SM messages between the UE 501 and the SMF 524, and act as a transparent proxy for routing SM messages. AMF 521 may also provide transport for SMS messages between UE 501 and an SMSF (not shown by Figure 5). AMF 521 may act as SEAF, which may include interaction with the AUSF 522 and the UE 501, receipt of an intermediate key that was established as a result of the UE 501 authentication process. Where USIM based authentication is used, the AMF 521 may retrieve the security material from the AUSF 522. AMF 521 may also include a SCM function, which receives a key from the SEA that it uses to derive access-network specific keys. Furthermore, AMF 521 may be a termination point of a RAN CP interface, which may include or be an N2 reference point between the (R)AN 510 and the AMF 521; and the AMF 521 may be a termination point of NAS (Nl) signalling, and perform NAS ciphering and integrity protection.

[0081] AMF 521 may also support NAS signalling with a UE 501 over an N3 IWF

interface. The N3IWF may be used to provide access to untrusted entities. N3IWF may be a termination point for the N2 interface between the (R)AN 510 and the AMF 521 for the control plane, and may be a termination point for the N3 reference point between the (R)AN 510 and the UPF 502 for the user plane. As such, the AMF 521 may handle N2 signalling from the SMF 524 and the AMF 521 for PDU sessions and QoS,

encap sul ate/ de-encap sul ate packets for IP Sec and N3 tunnelli ng, mark N3 user-plane packets in the uplink, and enforce QoS corresponding to N3 packet marking taking into account QoS requirements associated with such marking received over N2. N3IWF may also relay uplink and downlink control-plane NAS signalling between the UE 501 and AMF 521 via an Nl reference point between the UE 501 and the AMF 521, and relay uplink and downlink user-plane packets between the UE 501 and UPF 502. The N3IWF also provides mechanisms for IP sec tunnel establishment with the UE 501. The AMF 521 may exhibit an Namf service-based interface, and may be a termination point for an N14 reference point between two AMFs 521 and an N17 reference point between the AMF 521 and a 5G-EIR (not shown by Figure 5).

[0082] The UE 501 may need to register with the AMF 521 in order to receive network services. RM is used to register or deregister the UE 501 with the network (e.g., AMF 521), and establish a UE context in the network (e.g., AMF 521). The UE 501 may operate in an RM-REGI S TERED state or an RM-DEREGI S TERED state. In the

RM-DEREGISTERED state, the UE 501 is not registered with the network, and the UE context in AMF 521 holds no valid location or routing information for the UE 501 so the UE 501 is not reachable by the AMF 521. In the RM-REGI S TERED state, the UE 501 is registered with the network, and the UE context in AMF 521 may hold a valid location or routing information for the UE 501 so the UE 501 is reachable by the AMF 521. In the RM-REGI S TERED state, the UE 501 may perform mobility Registration Update procedures, perform periodic Registration Update procedures triggered by expiration of the periodic update timer (e.g., to notify the network that the UE 501 is still active), and perfomi a Registration Update procedure to update UE capability information or to re negotiate protocol parameters with the network, among others.

[0083] The AMF 521 may store one or more RM contexts for the UE 501, where each

RM context is associated with a specific access to the network. The RM context may be a data structure, database object, etc. that indicates or stores, inter alia, a registration state per access type and the periodic update timer. The AMF 521 may also store a 5GC MM context that may be the same or similar to the (E)MM context discussed previously. In various embodiments, the AMF 521 may store a CE mode B Restriction parameter of the UE 501 in an associated MM context or RM context. The AMF 521 may also derive the value, when needed, from the UE’s usage setting parameter already stored in the UE context (and/or MM/RM context).

[0084] CM may be used to establish and release a signaling connection between the UE

501 and the AMF 521 over the N1 interface. The signaling connection is used to enable NAS signaling exchange between the UE 501 and the CN 520, and comprises both the signaling connection between the UE and the AN (e.g., RRC connection or UE-N3IWF connection for non -3 GPP access) and the N2 connection for the UE 501 between the AN (e.g., RAN 510) and the AMF 521. The UE 501 may operate in one of two CM states, CM-IDLE mode or CM-CONNECTED mode. When the UE 501 is operating in the CM- IDLE state/mode, the UE 501 may have no NAS signaling connection established with the AMF 521 over the N 1 interface, and there may be (R)AN 510 signaling connection (e.g., N2 and/or N3 connections) for the UE 501. When the UE 501 is operating in the CM-CONNECTED state/mode, the UE 501 may have an established NAS signaling connection with the AMF 521 over the N1 interface, and there may be a (R)AN 510 signaling connection (e.g., N2 and/or N3 connections) for the UE 501. Establishment of an N2 connection between the (R)AN 510 and the AMF 521 may cause the UE 501 to transition from CM-IDLE mode to CM-CONNECTED mode, and the UE 501 may transition from the CM-CONNECTED mode to the CM-IDLE mode when N2 signaling between the (R)AN 510 and the AMF 521 is released.

[0085] The SMF 524 may be responsible for SM (e.g., session establishment, modify and release, including tunnel maintain between UPF and AN node); UE IP address allocation and management (including optional authorization); selection and control of UP function; configuring traffic steering at UPF to route traffic to proper destination; termination of interfaces toward policy control functions; controlling part of policy enforcement and QoS; lawful intercept (for SM events and interface to LI system); termination of SM parts of NAS messages; downlink data notification; initiating AN specific SM information, sent via AMF over N2 to AN; and determining SSC mode of a session. SM may refer to management of a PDU session, and a PDU session or“session” may refer to a PDU connectivity service that provides or enables the exchange of PDUs between a UE 501 and a data network (DN) 503 identified by a Data Network Name (DNN). PDU sessions may be established upon UE 501 request, modified upon UE 501 and 5GC 520 request, and released upon UE 501 and 5GC 520 request using NAS SM signaling exchanged over the N1 reference point between the UE 501 and the SMF 524. Upon request from an application server, the 5GC 520 may trigger a specific application in the UE 501. In response to receipt of the trigger message, the UE 501 may pass the trigger message (or relevant parts/information of the trigger message) to one or more identified applications in the UE 501. The identified application(s) in the UE 501 may establish a PDU session to a specific DNN. The SMF 524 may check whether the UE 501 requests are compliant with user subscription information associated with the UE 501. In this regard, the SMF 524 may retrieve and/or request to receive update notifications on SMF 524 level subscription data from the UDM 527.

[0086] The SMF 524 may include the following roaming functionality: handling local enforcement to apply QoS SLAs (VPLMN); charging data collection and charging interface (VPLMN); lawful intercept (in VPLMN for SM events and interface to LI system); and support for interaction with external DN for transport of signalling for PDU session authorizati on/ authenti cati on by external DN. An N 16 reference point between two SMFs 524 may be included in the system 500, which may be between another SMF 524 in a visited network and the SMF 524 in the home network in roaming scenarios.

Additionally, the SMF 524 may exhibit the Nsmf service-based interface.

[0087] The NEF 523 may provide means for securely exposing the services and

capabilities provided by 3 GPP network functions for third party, internal exposure/re exposure, Application Functions (e.g., AF 528), edge computing or fog computing systems, etc. In such embodiments, the NEF 523 may authenticate, authorize, and/or throttle the AFs. NEF 523 may also translate information exchanged with the AF 528 and information exchanged with internal network functions. For example, the NEF 523 may translate between an AF - S ervi ce-Identifi er and an internal 5GC information. NEF 523 may also receive information from other network functions (NFs) based on exposed capabilities of other network functions. This information may be stored at the NEF 523 as structured data, or at a data storage NF using standardized interfaces. The stored information can then be re-exposed by the NEF 523 to other NFs and AFs, and/or used for other purposes such as analytics. Additionally, the NEF 523 may exhibit an Nnef service-based interface.

[0088] The NRF 525 may support service discovery functions, receive NF discovery requests from NF instances, and provide the information of the discovered NF instances to the NF instances. NRF 525 also maintains information of available NF instances and their supported services. As used herein, the terms“instantiate,”“instantiation,” and the like may refer to the creation of an instance, and an“instance” may refer to a concrete occurrence of an object, which may occur, for example, during execution of program code. Additionally, the NRF 525 may exhibit the Nnrf service-based interface.

[0089] The PCF 526 may provide policy rules to control plane function(s) to enforce them, and may also support unified policy framework to govern network behaviour. The PCF 526 may also implement an FE to access subscription information relevant for policy decisions in a UDR of the UDM 527. The PCF 526 may communicate with the AMF 521 via an N15 reference point between the PCF 526 and the AMF 521, which may include a PCF 526 in a visited network and the AMF 521 in case of roaming scenarios. The PCF

526 may communicate with the AF 528 via an N5 reference point between the PCF 526 and the AF 528; and with the SMF 524 via an N7 reference point between the PCF 526 and the SMF 524. The system 500 and/or CN 520 may also include an N24 reference point between the PCF 526 (in the home network) and a PCF 526 in a visited network. Additionally, the PCF 526 may exhibit an Npcf service-based interface.

[0090] The UDM 527 may handle sub scripti on-rel ated information to support the

network entities’ handling of communication sessions, and may store subscription data of UE 501. For example, subscription data may be communicated between the UDM 527 and the AMF 521 via an N8 reference point between the UDM 527 and the AMF. The UDM 527 may include two parts, an application FE and a UDR (the FE and UDR are not shown by Figure 5). The UDR may store subscription data and policy data for the UDM

527 and the PCF 526, and/or structured data for exposure and application data (including PFDs for application detection, application request information for multiple UEs 501) for the NEF 523. The Nudr service-based interface may be exhibited by the UDR 221 to allow the UDM 527, PCF 526, and NEF 523 to access a particular set of the stored data, as well as to read, update (e.g., add, modify), delete, and subscribe to notification of relevant data changes in the UDR. The UDM may include a UDM-FE, which is in charge of processing credentials, location management, subscription management and so on. Several different front ends may serve the same user in different transactions. The UDM- FE accesses subscription information stored in the UDR and performs authentication credential processing, user identification handling, access authorization,

registration/mobility management, and subscription management. The UDR may interact with the SMF 524 via an N10 reference point between the UDM 527 and the SMF 524. UDM 527 may also support SMS management, wherein an SMS-FE implements the similar application logic as discussed previously. Additionally, the UDM 527 may exhibit the Nudm service-based interface.

[0091] The AF 528 may provide application influence on traffic routing, provide access to the NCE, and interact with the policy framework for policy control. The NCE may be a mechanism that allows the 5GC 520 and AF 528 to provide information to each other via NEF 523, which may be used for edge computing implementations. In such

implementations, the network operator and third party services may be hosted close to the UE 501 access point of attachment to achieve an effi cient sendee delivery through the reduced end-to-end latency and load on the transport network. For edge computing implementations, the 5GC may select a UPF 502 close to the UE 501 and execute traffic steering from the UPF 502 to DN 503 via the N6 interface. This may be based on the UE subscription data, UE location, and information provided by the AF 528. In this way, the AF 528 may influence UPF (re)selection and traffic routing. Based on operator deployment, when AF 528 is considered to be a trusted entity, the network operator may permit AF 528 to interact directly with relevant NFs. Additionally, the AF 528 may exhibit an Naf service-based interface.

[0092] The NSSF 529 may select a set of network slice instances serving the UE 501.

The NSSF 529 may also determine allowed NSSAI and the mapping to the subscribed S- NSSAIs, if needed. The NSSF 529 may also determine the AMF set to be used to serve the UE 501 , or a list of candidate AMF(s) 521 based on a suitable configuration and possibly by querying the NRF 525. The selection of a set of network slice instances for the UE 501 may be triggered by the AMF 521 with which the UE 501 is registered by interacting with the NSSF 529, which may lead to a change of AMF 521. The NSSF 529 may interact with the AMF 521 via an N22 reference point between AMF 521 and NSSF 529; and may communicate with another NSSF 529 in a visited network via an N31 reference point (not shown by Figure 5). Additionally, the NSSF 529 may exhibit an Nnssf service-based interface.

[0093] As discussed previously, the CN 520 may include an SMSF, which may be

responsible for SMS subscription checking and verification, and relaying SM messages to/from the UE 501 to/from other entities, such as an SMS-GMSC/IWMSC/SMS-router. The SMS may also interact with AMF 521 and UDM 527 for a notifi cation procedure that the UE 501 is available for SMS transfer (e.g., set a UE not reachable flag, and notifying UDM 527 when UE 501 is available for SMS).

[0094] The CN 120 may also include other elements that are not shown by Figure 5, such as a Data Storage sy stem/ architecture, a 5G-EIR, a SEPP, and the like. The Data Storage system may include a SDSF, an UDSF, and/or the like. Any NF may store and retrieve unstructured data into/from the UDSF (e.g., UE contexts), via N18 reference point between any NF and the UDSF (not shown by Figure 5). Individual NFs may share a UDSF for storing their respective unstructured data or individual NFs may each have their own UDSF located at or near the individual NFs. Additionally, the UDSF may exhibit an Nudsf service-based interface (not shown by Figure 5). The 5G-EIR may be an NF that checks the status of PEI for determining whether particular equipment/entities are blacklisted from the network; and the SEPP may be a non-transparent proxy that performs topology hiding, message filtering, and policing on inter-PLMN control plane interfaces.

[0095] Additionally, there may be many more reference points and/or service-based

interfaces between the NF services in the NFs; however, these interfaces and reference points have been omitted from Figure 5 for clarity. In one example, the CN 520 may include an Nx interface, which is an inter-CN interface between the MME (e.g., MME 421) and the AMF 521 in order to enable interworking between CN 520 and CN 420. Other example interfaces/reference points may include an N5g-EIR service-based interface exhibited by a 5G-EIR, an N27 reference point between the NRF in the visited network and the NRF in the home network; and an N31 reference point between the NSSF in the visited network and the NSSF in the home network.

[0096] Figure 6 illustrates an example of infrastructure equipment 6 600 in accordance with various embodiments. The infrastructure equipment 600 (or“system 600”) may be implemented as a base station, radio head, RAN node such as the RAN nodes 311 and/or AP 306 shown and described previously, application server(s) 330, and/or any other element/device discussed herein. In other examples, the system 600 could be

implemented in or by a UE.

[0097] The system 600 includes application circuitry 605, baseband circuitry 610, one or more radio front end modules (RFEMs) 615, memory circuitry 620, power management integrated circuitry (PMIC) 625, power tee circuitry 630, network controller circuitry 635, network interface connector 640, satellite positioning circuitry 645, and user interface 650. In some embodiments, the device 600 may include additional elements such as, for example, memory/storage, display, camera, sensor, or input/output (I/O) interface. In other embodiments, the components described below may be included in more than one device. For example, said circuitries may be separately included in more than one device for CRAN, vBBU, or other like implementations.

[0098] Application circuitry 605 includes circuitry such as, but not limited to one or more processors (or processor cores), cache memory, and one or more of low drop-out voltage regulators (LDOs), interrupt controllers, serial interfaces such as SPI, I 2 C or universal programmable serial interface module, real time clock (RTC), timer-counters including interval and watchdog timers, general purpose input/output (I/O or IO), memory card controllers such as Secure Digital (SD) MultiMediaCard (MMC) or similar, Universal Serial Bus (USB) interfaces, Mobile Industry Processor Interface (MIPI) interfaces and Joint Test Access Group (JTAG) test access ports. The processors (or cores) of the application circuitry 605 may be coupled with or may include memory/storage elements and may be configured to execute instructions stored in the memory/storage to enable various applications or operating systems to run on the system 600. In some

implementations, the memory /storage elements may be on-chip memory circuitry, which may include any suitable volatile and/or non-volatile memory, such as DRAM, SRAM, EPROM, EEPROM, Flash memory, solid-state memory, and/or any other type of memory device technology, such as those discussed herein. [0099] The processor(s) of application circuitry 605 may include, for example, one or more processor cores (CPUs), one or more application processors, one or more graphics processing units (GPUs), one or more reduced instruction set computing (RISC) processors, one or more Acorn RISC Machine (ARM) processors, one or more complex instruction set computing (CISC) processors, one or more digital signal processors (DSP), one or more FPGAs, one or more PLDs, one or more ASICs, one or more

microprocessors or controllers, or any suitable combination thereof In some

embodiments, the application circuitry 605 may comprise, or may be, a special-purpose processor/ controll er to operate according to the various embodiments herein. As examples, the processor(s) of application circuitry 605 may include one or more Intel Pentium®, Core®, or Xeon® processor(s); Advanced Micro Devices (AMD) Ryzen® processor(s), Accelerated Processing Units (APUs), or Epyc® processors; ARM-based processor(s) licensed from ARM Holdings, Ltd. such as the ARM Cortex- A family of processors and the ThunderX2® provided by Cavium(TM), Inc.; a MIPS-based design from MIPS Technologies, Inc. such as MIPS Warrior P-class processors; and/or the like.

In some embodiments, the system 600 may not utilize application circuitry 605, and instead may include a special-purpose processor/controller to process IP data received from an EPC or 5GC, for example.

[0100] In some implementations, the application circuitry 605 may include one or more hardware accelerators, which may be microprocessors, programmable processing devices, or the like. The one or more hardware accelerators may include, for example, computer vision (CV) and/or deep learning (DL) accelerators. As examples, the programmable processing devices may be one or more a field-programmable devices (FPDs) such as field-programmable gate arrays (FPGAs) and the like; programmable logic devices (PLDs) such as complex PLDs (CPLDs), high-capacity PLDs (HCPLDs), and the like; ASICs such as structured ASICs and the like; programmable SoCs (PSoCs); and the like. In such implementations, the circuitry of application circuitry 605 may comprise logic blocks or logic fabric, and other interconnected resources that may be programmed to perform vari ous functions, such as the procedures, methods, functi ons, etc. of the various embodiments discussed herein. In such embodiments, the circuitry of application circuitry 605 may include memory cells (e.g., erasable programmable read-only memory

(EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, static memory (e.g., static random access memory (SRAM), anti-fuses, etc.)) used to store logic blocks, logic fabric, data, etc. in look-up-tables (LUTs) and the like.

[0101] The baseband circuitry 610 may be implemented, for example, as a solder-down substrate including one or more integrated circuits, a single packaged integrated circuit soldered to a main circuit board or a multi-chip module containing two or more integrated circuits. The various hardware electronic elements of baseband circuitry 610 are discussed infra with regard to Figure 8.

[0102] User interface circuitry 650 may include one or more user interfaces designed to enable user interaction with the system 600 or peripheral component interfaces designed to enable peripheral component interaction with the system 600. User interfaces may include, but are not limited to, one or more physical or virtual buttons (e.g., a reset button), one or more indicators (e.g., light emitting diodes (LEDs)), a physical keyboard or keypad, a mouse, a touchpad, a touchscreen, speakers or other audio emitting devices, microphones, a printer, a scanner, a headset, a display screen or display device, etc. Peripheral component interfaces may include, but are not limited to, a nonvolatile memory port, a universal serial bus (USB) port, an audio jack, a power supply interface, etc.

[0103] The radio front end modules (RFEMs) 615 may comprise a millimeter wave

(mmWave) RFEM and one or more sub -mm Wave radio frequency integrated circuits (RFICs). In some implementations, the one or more sub-mmWave RFICs may be physically separated from the mmWave RFEM. The RFICs may include connections to one or more antennas or antenna arrays (see e.g., antenna array 8111 of Figure 8 infra), and the RFEM may be connected to multiple antennas. In alternative implementations, both mmWave and sub-mmWave radio functions may be implemented in the same physical RFEM 615, which incorporates both mmWave antennas and sub-mmWave.

[0104] The memory circuitry 620 may include one or more of volatile memory including dynamic random access memory (DRAM) and/or synchronous dynamic random access memory (SDRAM), and nonvolatile memory (NVM) including high-speed electrically erasable memory (commonly referred to as Flash memory), phase change random access memory (PRAM), magnetoresistive random access memory (MRAM), etc., and may incorporate the three-dimensional (3D) cross-point (XPOINT) memories from Intel® and Micron®. Memory circuitry 620 may be implemented as one or more of solder down packaged integrated circuits, socketed memory modules and plug-in memory cards.

[0105] The PMIC 625 may include voltage regulators, surge protectors, power alarm

detection circuitry, and one or more backup power sources such as a battery or capacitor. The power alarm detection circuitry may detect one or more of brown out (under-voltage) and surge (over-voltage) conditions. The power tee circuitry 630 may provide for electrical power drawn from a network cable to provide both power supply and data connectivity to the infrastructure equipment 600 using a single cable.

[0106] The network controller circuitry 635 may provide connectivity to a network using a standard network interface protocol such as Ethernet, Ethernet over GRE Tunnels, Ethernet over Multiprotocol Label Switching (MPLS), or some other suitable protocol . Network connectivity may be provided to/from the infrastructure equipment 600 via network interface connector 640 using a physical connection, which may be electrical (commonly referred to as a“copper interconnect”), optical, or wireless. The network controller circuitry 635 may include one or more dedicated processors and/or FPGAs to communicate using one or more of the aforementioned protocols. In some

implementations, the network controller circuitry 635 may include multiple controllers to provide connectivity to other networks using the same or different protocols.

[0107] The positioning circuitry 645 includes circuitry to receive and decode signals transmitted/broadcasted by a positioning network of a global navigation satellite system (GNSS). Examples of navigation satellite constellations (or GNSS) include United States’ Global Positioning System (GPS), Russia’s Global Navigation System (GLONASS), the European Union’s Galileo system, China’s BeiDou Navigation Satellite System, a regional navigation system or GNSS augmentation system (e.g., Navigation with Indian Constellation (NAVIC), Japan’s Quasi-Zenith Satellite System (QZSS), France’s Doppler Orbitography and Radio-positioning Integrated by Satellite (DORIS), etc.), or the like. The positioning circuitry 645 comprises various hardware elements (e.g., including hardware devices such as switches, filters, amplifiers, antenna elements, and the like to facilitate OTA communications) to communicate with components of a positioning network, such as navigation satellite constellation nodes. In some embodiments, the positioning circuitry 645 may include a Micro-Technology for Positioning, Navigation, and Timing (Micro-PNT) IC that uses a master timing clock to perform position tracking/estimation without GNSS assistance. The positioning circuitry 645 may also be part of, or interact with, the baseband circuitry 610 and/or RFEMs 615 to communicate with the nodes and components of the positioning network. The positioning circuitry 645 may also provide position data and/or time data to the application circuitry 605, which may use the data to synchronize operations with various infrastructure (e.g., RAN nodes 311, etc.), or the like.

[0108] The components shown by Figure 6 may communicate with one another using interface circuitry, which may include any number of bus and/or interconnect (IX) technologies such as industry standard architecture (ISA), extended ISA (EISA), peripheral component interconnect (PCI), peripheral component interconnect extended (PCIx), PCI express (PCIe), or any number of other technologies. The bus/IX may be a proprietary bus, for example, used in a SoC based system. Other bus/IX systems may be included, such as an I 2 C interface, an SPI interface, point to point interfaces, and a power bus, among others.

[0109] Figure 7 illustrates an example of a platform 700 (or“device 700”) in accordance with various embodiments. In embodiments, the computer platform 700 may be suitable for use as UEs 301, 302, 401, application servers 330, and/or any other element/device discussed herein. The platform 700 may include any combinations of the components shown in the example. The components of platform 700 may be implemented as integrated circuits (ICs), portions thereof, discrete electronic devices, or other modules, logic, hardware, software, firmware, or a combination thereof adapted in the computer platform 700, or as components otherwise incorporated within a chassis of a larger system. The block diagram of Figure 7 is intended to show a high level view of components of the computer platform 700. However, some of the components shown may be omitted, additional components may be present, and different arrangement of the components shown may occur in other implementations.

[0110] Application circuitry 705 includes circuitry such as, but not limited to one or more processors (or processor cores), cache memory, and one or more of LDOs, interrupt controllers, serial interfaces such as SPI, I 2 C or universal programmable serial interface module, R FC, timer-counters including interval and watchdog timers, general purpose I/O, memory card controllers such as SD MMC or similar, USB interfaces, MTPi

interfaces, and JTAG test access ports. The processors (or cores) of the application circuitry 705 may be coupled with or may include memory/storage elements and may be configured to execute instructions stored in the memory/storage to enable various applications or operating systems to run on the system 700. In some implementations, the memory/storage elements may be on-chip memory circuitry, which may include any suitable volatile and/or non-volatile memory, such as DRAM, SRAM, EPROM,

EEPROM, Flash memory', solid-state memory, and/or any other type of memory device technology, such as those discussed herein.

[0111] The processor(s) of application circuitry 605 may include, for example, one or more processor cores, one or more application processors, one or more GPUs, one or more RISC processors, one or more ARM processors, one or more CISC processors, one or more DSP, one or more FPGAs, one or more PLDs, one or more ASICs, one or more microprocessors or controllers, a multithreaded processor, an ultra-low voltage processor, an embedded processor, some other known processing element, or any suitable combination thereof. In some embodiments, the application circuitry 605 may comprise, or may be, a special-purpose processor/controller to operate according to the various embodiments herein.

[0112] As examples, the processor(s) of application circuitry 705 may include an Intel®

Architecture Core™ based processor, such as a Quark™, an Atom™, an i3, an i5, an i7, or an MCU-class processor, or another such processor available from Intel® Corporation, Santa Clara, CA. The processors of the application circuitry 705 may also be one or more of Advanced Micro Devices (AMD) Ryzen® processor(s) or Accelerated Processing Units (APUs); A5-A9 processor(s) from Apple® Inc., Snapdragon™ processor(s) from Qualcomm® Technologies, Inc., Texas Instruments, Inc.® Open Multimedia

Applications Platform (OMAP)™ processor(s); a MIPS-based design from MIPS Technologies, Inc. such as MIPS Warrior M-class, Warrior I-class, and Warrior P-class processors; an ARM-based design licensed from ARM Holdings, Ltd., such as the ARM Cortex-A, Cortex -R, and Cortex -M family of processors; or the like. In some

implementations, the application circuitry 705 may be a part of a system on a chip (SoC) in which the application circuitry 705 and other components are formed into a single integrated circuit, or a single package, such as the Edison™ or Galileo™ SoC boards from Intel® Corporation. [0113] Additionally or alternatively, application circuitry 705 may include circuitry such as, but not limited to, one or more a field-programmable devices (FPDs) such as FPGAs and the like; programmable logic devices (PLDs) such as complex PLDs (CPLDs), high- capacity PLDs (HCPLDs), and the like; ASICs such as structured ASICs and the like; programmable SoCs (PSoCs); and the like. In such embodiments, the circuitry of application circuitry 705 may comprise logic blocks or logic fabric, and other

interconnected resources that may be programmed to perform various functions, such as the procedures, methods, functions, etc. of the various embodiments discussed herein. In such embodiments, the circuitry of application circuitry 705 may include memory cells (e.g., erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), flash memory, static memory (e.g., static random access memory (SRAM), anti-fuses, etc.)) used to store logic blocks, logic fabric, data, etc. in look-up tables (LUTs) and the like.

[0114] The baseband circuitry 710 may be implemented, for example, as a solder-down substrate including one or more integrated circuits, a single packaged integrated circuit soldered to a main circuit board or a multi-chip module containing two or more integrated circuits. The various hardware electronic elements of baseband circuitry 710 are discussed infra with regard to Figure 8.

[0115] The RFEMs 715 may comprise a millimeter wave (mm Wave) RFEM and one or more sub-mmWave radio frequency integrated circuits (RFICs). In some implementations, the one or more sub-mmWave RFICs may be physically separated from the mm Wave RFEM. The RFICs may include connections to one or more antennas or antenna arrays (see e.g., antenna array 81 1 1 of Figure 8 infra), and the RFEM may be connected to multiple antennas. In alternative implementations, both mm Wave and sub-mmWave radio functions may be implemented in the same physical RFEM 715, which incorporates both mm Wave antennas and sub-mmWave.

[0116] The memory circuitry 720 may include any number and type of memory devices used to provide for a given amount of system memory. As examples, the memory circuitry 720 may include one or more of volatile memory including random access memory (RAM), dynamic RAM (DRAM) and/or synchronous dynamic RAM (SDRAM), and nonvolatile memory (NVM) including high-speed electrically erasable memory (commonly referred to as Flash memory), phase change random access memory (PRAM), magnetoresi stive random access memory (MRAJV1), etc. The memory circuitry 720 may be developed in accordance with a Joint Electron Devices Engineering Council (JEDEC) low power double data rate (LPDDR)-based design, such as LPDDR2, LPDDR3, LPDDR4, or the like. Memory circuitry 720 may be implemented as one or more of solder down packaged integrated circuits, single die package (SDP), dual die package (DDP) or quad die package (Q17P), socketed memory modules, dual inline memory modules (DIMMs) including microDIMMs or MiniDIMMs, and/or soldered onto a motherboard via a ball grid array (BGA). In low power implementations, the memory circuitry 720 may be on-die memory or registers associated with the application circuitry 705. To provide for persistent storage of information such as data, applications, operating systems and so forth, memory circuitry 720 may include one or more mass storage devices, which may include, inter alia, a solid state disk drive (SSDD), hard disk drive (HDD), a micro HDD, resistance change memories, phase change memories, holographic memories, or chemical memories, among others. For example, the computer platform 700 may incorporate the three-dimensional (3D) cross-point (XPOINT) memories from Intel® and Micron®.

[0117] Removable memory circuitry 723 may include devices, circuitry,

enclosures/housings, ports or receptacles, etc. used to couple portable data storage devices with the platform 700. These portable data storage devices may be used for mass storage purposes, and may include, for example, flash memory cards (e.g., Secure Digital (SD) cards, microSD cards, xD picture cards, and the like), and USB flash drives, optical discs, external HDDs, and the like.

[0118] The platform 700 may also include interface circuitry (not shown) that is used to connect external devices with the platform 700. The external devices connected to the platform 700 via the interface circuitry include sensor circuitry 721 and electro mechanical components (EMCs) 722, as well as removable memory devices coupled to removable memory circuitry 723.

[0119] The sensor circuitry 721 include devices, modules, or subsystems whose purpose is to detect events or changes in its environment and send the information (sensor data) about the detected events to some other a device, module, subsystem, etc. Examples of such sensors include, inter alia, inertia measurement units (IMUs) comprising

accelerometers, gyroscopes, and/or magnetometers; microelectromechanical systems (MEMS) or nanoelectromechanical systems (NEMS) comprising 3 -axis accelerometers, 3-axis gyroscopes, and/or magnetometers; level sensors; flow sensors; temperature sensors (e.g., thermistors); pressure sensors; barometric pressure sensors; gravimeters; altimeters; image capture devices (e.g., cameras or lensless apertures); light detection and ranging (LiDAR) sensors; proximity sensors (e.g., infrared radiation detector and the like), depth sensors, ambient light sensors, ultrasonic transceivers; microphones or other like audio capture devices; etc.

[0120] EMCs 722 include devices, modules, or subsystems whose purpose is to enable platform 700 to change its state, position, and/or orientation, or move or control a mechanism or (sub)system. Additionally, EMCs 722 may be configured to generate and send messages/signalli ng to other components of the platform 700 to indicate a current state of the EMCs 722. Examples of the EMCs 722 include one or more power switches, relays including electromechanical relays (EMRs) and/or solid state relays (SSRs), actuators (e.g., valve actuators, etc.), an audible sound generator, a visual warning device, motors (e.g., DC motors, stepper motors, etc.), wheels, thrusters, propellers, claws, clamps, hooks, and/or other like electro-mechanical components. In embodiments, platform 700 is configured to operate one or more EMCs 722 based on one or more captured events and/or instructions or control signals received from a service provider and/or various clients.

[0121] In some implementations, the interface circuitry may connect the platform 700 with positioning circuitry 745. The positioning circuitry 745 includes circuitry to receive and decode signals transmitted/broadcasted by a positioning network of a GNSS.

Examples of navigation satellite constellations (or GNSS) include United States’ GPS, Russia’s GLONASS, the European Union’s Galileo system, China’s BeiDou Navigation Satellite System, a regional navigation system or GNSS augmentation system (e.g., NAVIC), Japan’s QZSS, France’s DORIS, etc.), or the like. The positioning circuitry 745 comprises various hardware elements (e.g., including hardware devices such as switches, filters, amplifiers, antenna elements, and the like to facilitate OTA communications) to communicate with components of a positioning network, such as navigation satellite constellation nodes. In some embodiments, the positioning circuitry 745 may include a Micro-PNT IC that uses a master timing clock to perform position tracking/estimation without GNSS assistance. The positioning circuitry 745 may also be part of, or interact with, the baseband circuitry 610 and/or RFEMs 715 to communicate with the nodes and components of the posi tioning network. The positi oni ng circui try 745 may also provide position data and/or time data to the application circuitry 705, which may use the data to synchronize operations with various infrastructure (e.g., radio base stations), for turn-by-tum navigation applications, or the like

[0122] In some implementations, the interface circuitry may connect the platform 700 with Near-Field Communication (NFC) circuitry 740. NFC circuitry 740 is configured to provide contactless, short-range communications based on radio frequency identification (RFID) standards, wherein magnetic field induction is used to enable communication between NFC circuitry 740 and NFC-enabled devices external to the platform 700 (e.g., an“NFC touchpoint”). NFC circuitry 740 compri ses an NFC controller coupled with an antenna element and a processor coupled with the NFC controller. The NFC controller may be a chip/IC providing NFC functionalities to the NFC circuitry 740 by executing NFC controller firmware and an NFC stack. The NFC stack may be executed by the processor to control the NFC controller, and the NFC controller firmware may be executed by the NFC controller to control the antenna element to emit short-range RF signals. The RF signals may power a passive NFC tag (e.g., a microchip embedded in a sticker or wristband) to transmit stored data to the NFC circuitry 740, or initiate data transfer between the NFC circuitry 740 and another active NFC device (e.g., a smartphone or an NFC-enabled POS terminal) that is proximate to the platform 700.

[0123] The driver circuitry 746 may include software and hardware elements that operate to control particular devices that are embedded in the platform 700, attached to the platform 700, or otherwise communicatively coupled with the platform 700 The driver circuitry 746 may include individual drivers allowing other components of the platform 700 to interact with or control various input/output (I/O) devices that may be present within, or connected to, the platform 700. For example, driver circuitry 746 may include a display driver to control and allow access to a display device, a touchscreen driver to control and allow access to a touchscreen interface of the platform 700, sensor drivers to obtain sensor readings of sensor circuitry 721 and control and allow access to sensor circuitry 721, EMC drivers to obtain actuator positions of the EMCs 722 and/or control and allow access to the EMCs 722, a camera driver to control and allow access to an embedded image capture device, audio drivers to control and allow access to one or more audio devices.

[0124] The power management integrated circuitry (PMIC) 725 (also referred to as

“power management circuitry' 725”) may manage power provided to various components of the platform 700. In particular, with respect to the baseband circuitry 710, the PMIC 725 may control power-source selection, voltage scaling, battery charging, or DC-to-DC conversion. The PMIC 725 may often be included when the platform 700 is capable of being powered by a battery 730, for example, when the device is included in a UE 301, 302, 401.

[0125] In some embodiments, the PMIC 725 may control, or otherwise be part of, various power saving mechanisms of the platform 700. For example, if the platform 700 is in an RRC_Connected state, where it is still connected to the RAN node as it expects to receive traffic shortly, then it may enter a state known as Discontinuous Reception Mode (DRX) after a period of inactivity. During this state, the platform 700 may power down for brief intervals of time and thus save power. If there is no data traffic activity for an extended period of time, then the platform 700 may transition off to an RRC Idle state, where it disconnects from the network and does not perform operations such as channel quality feedback, handover, etc. The platform 700 goes into a very low power state and it performs paging where again it periodically wakes up to listen to the network and then powers down again. The platform 700 may not receive data in this state; in order to receive data, it transitions back to RRC Connected state. An additional power saving mode may allow a device to be unavailable to the network for periods longer than a paging interval (ranging from seconds to a few hours). During this time, if the device is not connected to the network, it may power down completely. Any data sent during this time incurs a large delay and it is assumed the delay is acceptable.

[0126] A battery 730 may power the platform 700, although in some examples the

platform 700 may be mounted deployed in a fixed location, and may have a power supply coupled to an electrical grid. The battery 730 may be a lithium ion battery', a metal-air battery, such as a zinc-air battery, an aluminum-air battery', a lithium-air battery, and the like. In some implementations, such as in V2X applications, the battery 730 may be a typical lead-acid automotive battery. [0127] In some implementations, the battery 730 may be a“smart battery,” which includes or is coupled with a Battery Management System (BMS) or battery monitoring integrated circuitry. The BMS may be included in the platform 700 to track the state of charge (SoCh) of the battery 730. The BMS may be used to monitor other parameters of the battery 730 to provide failure predictions, such as the state of health (SoH) and the state of function (SoF) of the battery 730. The BMS may communicate the information of the battery 730 to the application circuitry 705 or other components of the platform 700. The BMS may also include an analog-to-digital (ADC) convertor that allows the application circuitry 705 to di rectly monitor the voltage of the battery 730 or the current flow from the battery 730. The battery parameters may be used to determine actions that the platform 700 may perform, such as transmission frequency, network operation, sensing frequency, and the like.

[0128] A power block, or other power supply coupled to an electrical grid may be

coupled with the BMS to charge the battery 730. In some examples, the power block XS30 may be replaced with a wireless power receiver to obtain the power wirelessly, for example, through a loop antenna in the computer platform 700. In these examples, a wireless battery charging circuit may be included in the BMS. The specific charging circuits chosen may depend on the size of the battery 730, and thus, the current required. The charging may be performed using the Airfuel standard promulgated by the Airfuel Alliance, the Qi wireless charging standard promulgated by the Wireless Power

Consortium, or the Rezence charging standard promulgated by the Alliance for Wireless Power, among others.

[0129] User interface circuitry 750 includes various input/output (I/O) devices present within, or connected to, the platform 700, and includes one or more user interfaces designed to enable user interaction with the platform 700 and/or peripheral

component interfaces designed to enable peripheral component interaction with the platform 700. The user interface circuitry 750 includes input device circuitry and output device circuitry. Input device circuitry includes any physical or virtual means for accepting an input including, inter alia, one or more physical or virtual buttons (e.g., a reset button), a physical keyboard, keypad, mouse, touchpad, touchscreen, microphones, scanner, headset, and/or the like. The output device circuitry includes any physical or virtual means for showing information or otherwise conveying information, such as sensor readings, actuator position(s), or other like information. Output device circuitry may include any number and/or combinations of audio or visual display, including, inter alia, one or more simple visual outputs/indicators (e.g., binary' status indicators (e.g., light emitting diodes (LEDs)) and multi -character visual outputs, or more complex outputs such as display devices or touchscreens (e.g., Liquid Chrystal Displays (LCD), LED displays, quantum dot displays, projectors, etc.), with the output of characters, graphics, multimedia objects, and the like being generated or produced from the operation of the platform 700. The output device circuitry may also include speakers or other audio emitting devices, printer(s), and/or the like. In some embodiments, the sensor circuitry 721 may be used as the input device circuitry (e.g., an image capture device, motion capture device, or the like) and one or more EMCs may be used as the output device circuitry (e.g., an actuator to provide haptic feedback or the like). In another example, NFC circuitry' comprising an NFC controller coupled with an antenna element and a processing device may be included to read electronic tags and/or connect with another NFC-enabled device. Peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a USB port, an audio jack, a power supply interface, etc.

[0130] Although not shown, the components of platform 700 may communicate with one another using a suitable bus or interconnect (IX) technology, which may include any number of technologies, including ISA, EISA, PCI, PCIx, PCIe, a Time-Trigger Protocol (TTP) system, a FlexRay system, or any number of other technologies. The bus/IX may be a proprietary bus/IX, for example, used in a SoC based system. Other bus/IX systems may be included, such as an I 2 C interface, an SPI interface, point-to-point interfaces, and a power bus, among others.

[0131] Figure 8 illustrates example components of baseband circuitry 8110 and radio front end modules (RFEM) 8115 in accordance with various embodiments. The baseband circuitry 8110 corresponds to the baseband circuitry 610 and 710 of Figures 6 and 7, respectively. The RFEM 81 15 corresponds to the RFEM 615 and 715 of Figures 6 and 7, respectively. As shown, the RFEMs 8115 may include Radio Frequency (RF) circuitry' 8106, front-end module (FEM) circuitry 8108, antenna array 8111 coupled together at least as shown.

[0132] The baseband circuitry' 8110 includes circuitry and/or control logic configured to carry out various radio/network protocol and radio control functions that enable communication with one or more radio networks via the RF circuitry 8106. The radio control functions may include, but are not limited to, signal

modulation/demodulation, encoding/ decoding, radio frequency shifting, etc. In some embodiments, modul ati on/ demodul ati on circui try of the baseband circuitry' 81 10 m ay include Fast-Fourier Transform (FFT), precoding, or constellation mapping/demapping functionality. In some embodiments, encoding/ decoding circuitry of the baseband circuitry 81 10 may include convolution, tail-biting convolution, turbo, Viterbi, or Low Density Parity Check (LDPC) encoder/decoder functionality. Embodiments of m odul ati on/ dem odul ati on and encoder/decoder functionality are not limited to these examples and may include other suitable functionality in other embodiments. The baseband circuitry 8110 is configured to process baseband signals received from a receive signal path of the RF circuitry 8106 and to generate baseband signals for a transmit signal path of the RF circuitry 8106. The baseband circuitry 8110 is configured to interface with application circuitry 605/XS205 (see Figures 6 and 7) for generation and processing of the baseband signals and for controlling operations of the RF circuitry 8106. The baseband circuitry 8110 may handle various radio control functions.

[0133] The aforementioned circuitry and/or control logic of the baseband circuitry 8110 may include one or more single or multi-core processors. For example, the one or more processors may include a 3G baseband processor 8104 A, a 4G/LTE baseband processor 8104B, a 5G/NR baseband processor 8104C, or some other baseband processor(s) 8104D for other existing generations, generations in development or to be developed in the future (e.g., sixth generation (6G), etc.). In other embodiments, some or all of the functionality of baseband processors 8104A-D may be included in modules stored in the memory' 8104G and executed via a Central Processing Unit (CPU) 8104E. In other embodiments, some or all of the functionality of baseband processors 8104A-D may be provided as hardware accelerators (e.g., FPGAs, ASICs, etc.) loaded with the appropriate bit streams or logic blocks stored in respective memory' cells. In various embodiments, the memory 8104G may store program code of a real-time OS (RTOS), which when executed by the CPU 8104E (or other baseband processor), is to cause the CPU 8104E (or other baseband processor) to manage resources of the baseband circuitry 81 10, schedule tasks, etc.

Examples of the RTOS may include Operating System Embedded (OSE)™ provided by Enea®, Nucleus RTOS™ provided by Mentor Graphics®, Versatile Real-Time Executive (VRTX) provided by Mentor Graphics®, ThreadX™ provided by Express Logic®, FreeRTOS, REX OS provided by Qualcomm®, OKL4 provided by Open Kernel (OK) Labs®, or any other suitable RTOS, such as those discussed herein. In addition, the baseband circuitry 8110 includes one or more audio digital signal processor(s) (DSP) 8104F. The audio DSP(s) 8104F include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other

embodiments.

[0134] In some embodiments, each of the processors 8104A-XT104E include respective memory interfaces to send/receive data to/from the memory 8104G. The baseband circuitry 8110 may further include one or more interfaces to communicatively couple to other circuitries/devices, such as an interface to send/receive data to/from memory external to the baseband circuitry 8110; an application circuitry interface to send/receive data to/from the application circuitry 605/XS205 of FIGS. 6-XT); an RF circuitry interface to send/receive data to/from RF circuitry 8106 of Figure 8; a wireless hardware connectivity interface to send/receive data to/from one or more wireless hardware elements (e.g., Near Field Communication (NFC) components, Bluetooth®/ Bluetooth® Low Energy components, Wi-Fi® components, and/or the like); and a power

management interface to send/receive power or control signal s to/from the PMIC 725.

[0135] In alternate embodiments (which may be combined with the above described

embodiments), baseband circuitry 8110 comprises one or more digital baseband systems, which are coupled with one another via an interconnect subsystem and to a CPU subsystem, an audio subsystem, and an interface subsystem. The digital baseband subsystems may also be coupled to a digital baseband interface and a mixed-signal baseband subsystem via another interconnect subsystem. Each of the interconnect subsystems may include a bus system, point-to-point connections, network-on-chip (NOC) structures, and/or some other suitable bus or interconnect technology, such as those discussed herein. The audio subsystem may include DSP circuitry, buffer memory, program memory, speech processing accelerator circuitry, data converter circuitry such as analog-to-digital and digital-to-analog converter circuitry, analog circuitry including one or more of amplifiers and filters, and/or other like components. In an aspect of the present disclosure, baseband circuitry 8110 may include protocol processing circuitry with one or more instances of control circuitry (not shown) to provide control functions for the digital baseband circuitry and/or radio frequency circuitry (e.g., the radio front end modules 8115).

[0136] Although not shown by Figure 8, in some embodiments, the baseband circuitry

8110 includes individual processing device(s) to operate one or more wireless

communication protocols (e.g., a“multi -protocol baseband processor” or“protocol processing circuitry”) and individual processing device(s) to implement PHY layer functions. In these embodiments, the PHY layer functions include the aforementioned radio control functions. In these embodiments, the protocol processing circuitry operates or implements various protocol layers/entities of one or more wireless communication protocols. In a first example, the protocol processing circuitry may operate LTE protocol entities and/or 5G/NR protocol entities when the baseband circuitry 8110 and/or RF circuitry 8106 are part of mm Wave communication circuitry or some other suitable cellular communication circuitry. In the first example, the protocol processing circuitry would operate MAC, RLC, PDCP, SDAP, RRC, and NAS functions. In a second example, the protocol processing circuitry may operate one or more IEEE-based protocols when the baseband circuitry 8110 and/or RF circuitry 8106 are part of a Wi-Fi communication system. In the second example, the protocol processing circuitry would operate Wi-Fi MAC and logical link control (EEC) functions. The protocol processing circuitry may include one or more memory structures (e.g., 8104G) to store program code and data for operating the protocol functions, as well as one or more processing cores to execute the program code and perform various operations using the data. The baseband circuitry 8110 may also support radio communications for more than one wireless protocol.

[0137] The various hardware elements of the baseband circuitry 81 10 discussed herein may be implemented, for example, as a solder-down substrate including one or more integrated circuits (ICs), a single packaged IC soldered to a main circuit board or a multi - chip module containing two or more ICs. In one example, the components of the baseband circuitry 8110 may be suitably combined in a single chip or chipset, or disposed on a same circuit board. In another example, some or all of the constituent components of the baseband circuitry 81 10 and RF circuitry 8106 may be implemented together such as, for example, a system on a chip (SoC) or Sy stem-i n-Package (SiP). In another example, some or all of the constituent components of the baseband circuitry' 8110 may be implemented as a separate SoC that is communicatively coupled with and RF circuitry 8106 (or multiple instances of RF circuitry 8106). In yet another example, some or all of the constituent components of the baseband circuitry 8110 and the appli cation circuitry 605/XS205 may be implemented together as individual SoCs mounted to a same circuit board (e.g., a“multi-chip package”).

[0138] In some embodiments, the baseband circuitry 8110 may provide for

communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry 8110 may support communication with an E- UTRAN or other WMAN, a WLAN, a WPAN. Embodiments in which the baseband circuitry 8110 is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.

[0139] RF circuitry' 8106 may enable communication with wireless networks

using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the RF circuitry 8106 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network. RF circuitry 8106 may include a receive signal path, which may include circuitry to down-convert RF signals received from the FEM circuitry 8108 and provide baseband signals to the baseband circuitry 8110. RF circuitry 8106 may also include a transmit signal path, which may include circuitry to up-convert baseband signals provided by the baseband circuitry 8110 and provide RF output signals to the FEM circuitry 8108 for transmission.

[0140] In some embodiments, the receive signal path of the RF circuitry 8106 may

include mixer circuitry 8106a, amplifier circuitry 8106b and filter circuitry 8106c. In some embodiments, the transmit signal path of the RF circuitry 8106 may include filter circuitry 8106c and mixer circuitry 8106a. RF circuitry 8106 may also include synthesizer circuitry 8106d for synthesizing a frequency for use by the mixer circuitry 8106a of the receive signal path and the transmit signal path. In some embodiments, the mixer circuitry 8106a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 8108 based on the synthesized frequency provided by synthesizer circuitry 8106d. The amplifier circuitry 8106b may be configured to amplify the down- converted signals and the filter circuitry 8106c may be a low-pass filter (LPF) or band pass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals. Output baseband signals may be provided to the baseband circuitry 8110 for further processing. In some embodiments, the output baseband signals may be zero-frequency baseband signals, although this is not a requirement. In some embodiments, mixer circuitry 8106a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.

[0141] In some embodiments, the mixer circuitry 8106a of the transmit signal path may be configured to up -convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 8106d to generate RF output signals for the FEM circuitry 8108. The baseband signals may be provided by the baseband circuitry 8110 and may be filtered by filter circuitry 8106c.

[0142] In some embodiments, the mixer circuitry 8106a of the receive signal path and the mixer circuitry 8106a of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and upconversion, respectively. In some embodiments, the mixer circuitry 8106a of the receive signal path and the mixer circuitry 8106a of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection). In some embodiments, the mixer circuitry 8106a of the receive signal path and the mixer circuitry 8106a of the transmit signal path may be arranged for direct downconversion and direct upconversion, respectively. In some embodiments, the mixer circuitry 8106a of the receive signal path and the mixer circuitry 8106a of the transmit signal path may be configured for super heterodyne operation.

[0143] In some embodiments, the output baseband signals and the input baseband signals may be analog baseband signals, although the scope of the embodiments is not limited in this respect. In some alternate embodiments, the output baseband signals and the input baseband signals may be digital baseband signals. In these alternate embodiments, the RF circuitry 8106 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 8110 may include a digital baseband interface to communicate with the RF circuitry 8106.

[0144] In some dual-mode embodiments, a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.

[0145] In some embodiments, the synthesizer circuitry 8106d may be a fractional -N

synthesizer or a fractional N/N+l synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable. For example, synthesizer circuitry 8106d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.

[0146] The synthesizer circuitry 8106d may be configured to synthesize an output

frequency for use by the mixer circuitry 8106a of the RF circuitry 8106 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 8106d may be a fractional N/N+l synthesizer.

[0147] In some embodiments, frequency input may be provided by a voltage controlled oscillator (VCO), although that is not a requirement. Divider control input may be provided by either the baseband circuitry 8110 or the application circuitry 605/XS205 depending on the desired output frequency. In some embodiments, a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the application circuitry 605/XS205.

[0148] Synthesizer circuitry 8106d of the RF circuitry 8106 may include a divider, a

delay-locked loop (DLL), a multiplexer and a phase accumulator. In some embodiments, the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DP A). In some embodiments, the DMD may be configured to divide the input signal by either N or N+l (e.g., based on a carry out) to provide a fractional division ratio. In some example embodiments, the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop. In these embodiments, the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line. In this way, the DLL provides negative feedback to help ensure that the total delay through the delay line is one VCO cycle.

[0149] In some embodiments, synthesizer circuitry 8106d may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other. In some embodiments, the output frequency may be a LO frequency (fLO). In some embodiments, the RF circuitry 8106 may include an IQ/polar converter. [0150] FEM circuitry 8108 may include a receive signal path, which may include circuitry configured to operate on RF signals received from antenna array 8111, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 8106 for further processing. FEM circuitry 8108 may also include a transmit signal path, which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 8106 for transmission by one or more of antenna elements of antenna array 8111. In various embodiments, the amplification through the transmit or receive signal paths may be done solely in the RF circuitry 8106, solely in the FEM circuitry 8108, or in both the RF circuitry 8106 and the FEM circuitry 8108.

[0151] In some embodiments, the FEM circuitry 8108 may include a TX/RX switch to switch between transmit mode and receive mode operation. The FEM circuitry' 8108 may include a receive signal path and a transmit signal path. The receive signal path of the FEM circuitry 8108 may include an ENA to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 8106). The transmit signal path of the FEM circuitry' 8108 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 8106), and one or more filters to generate RF signals for subsequent transmission by one or more antenna elements of the antenna array 8111.

[0152] The antenna array 8111 comprises one or more antenna elements, each of which is configured convert electrical signals into radio waves to travel through the air and to convert received radio waves into electrical signals. For example, digital baseband signals provided by the baseband circuitry 8110 is converted into analog RF signals (e.g., modulated waveform) that will be amplified and transmitted via the antenna elements of the antenna array 8111 including one or more antenna elements (not shown). The antenna elements may be omnidirectional, direction, or a combination thereof. The antenna elements may be formed in a multitude of arranges as are known and/or discussed herein. The antenna array 8111 may comprise microstrip antennas or printed antennas that are fabricated on the surface of one or more printed circuit boards. The antenna array 8111 may be formed in as a patch of metal foil (e.g., a patch antenna) in a vari ety of shapes, and may be coupled with the RF circuitry 8106 and/or FEM circuitry 8108 using metal transmission lines or the like. [0153] Processors of the application circuitry 605/XS205 and processors of the baseband circuitry 81 10 may be used to execute elements of one or more instances of a protocol stack. For example, processors of the baseband circuitry 8110, alone or in combination, may be used execute Layer 3, Layer 2, or Layer 1 functionality, while processors of the application circuitry 605/XS205 may utilize data (e.g., packet data) received from these layers and further execute Layer 4 functionality (e.g., TCP and UDP layers). As referred to herein, Layer 3 may comprise a RRC layer, described in further detail below. As referred to herein, Layer 2 may comprise a MAC layer, an RLC layer, and a PDCP layer, described in further detail below. As referred to herein, Layer 1 may comprise a PFIY layer of a UE/RAN node, described in further detail below.

[0154] Figure 9 illustrates various protocol functions that may be implemented in a

wireless communication device according to various embodiments. In particular, Figure 9 includes an arrangement 900 showing interconnections between various protocol layers/entities. The following description of Figure 9 is provided for various protocol layers/entities that operate in conjunction with the 5G/NR system standards and LTE system standards, but some or all of the aspects of Figure 9 may be applicable to other wireless communication network systems as well.

[0155] The protocol layers of arrangement 900 may include one or more of PFIY 910,

MAC 920, RLC 930, PDCP 940, SDAP 947, RRC 955, and NAS layer 957, in addition to other higher layer functions not illustrated. The protocol layers may include one or more service access points (e.g., items 959, 956, 950, 949, 945, 935, 925, and 915 in Figure 9) that may provide communication between two or more protocol layers.

[0156] The PHY 910 may transmit and receive physical layer signals 905 that may be received from or transmitted to one or more other communication devices. The physical layer signals 905 may comprise one or more physical channels, such as those discussed herein. The PHY 910 may further perform link adaptation or adaptive modulation and coding (AMC), power control, cell search (e.g., for initial synchronization and handover purposes), and other measurements used by higher layers, such as the RRC 955. The PHY 910 may still further perform error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, modul ati on/ demodul ati on of physical channels, interleaving, rate matching, mapping onto physical channels, and MIMO antenna processing. In embodiments, an instance of PHY 910 may process requests from and provide indications to an instance of MAC 920 via one or more PHY- SAP 915 According to some embodiments, requests and indications communicated via PHY- SAP 915 may comprise one or more transport channels.

[0157] Instance(s) of MAC 920 may process requests from, and provide indications to, an instance of RLC 930 via one or more MAC-SAPs 925. These requests and indications communicated via the MAC- SAP 925 may comprise one or more logical channels. The MAC 920 may perform mapping between the logical channels and transport channels, multiplexing of MAC SDUs from one or more logical channels onto TBs to be delivered to PHY 910 via the transport channels, de-multiplexing MAC SDUs to one or more logical channels from TBs delivered from the PHY 910 via transport channels,

multiplexing MAC SDUs onto TBs, scheduling information reporting, error correction through HARQ, and logical channel prioritization.

[0158] Instance(s) of RLC 930 may process requests from and provide indications to an instance of PDCP 940 via one or more radio link control service access points (RLC- SAP) 935. These requests and indications communicated via RLC-SAP 935 may comprise one or more RLC channels. The RLC 930 may operate in a plurality of modes of operation, including: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). The RLC 930 may execute transfer of upper layer protocol data units (PDUs), error correction through automatic repeat request (ARQ) for AM data transfers, and concatenation, segmentation and reassembly of RLC SDUs for UM and AM data transfers. The RLC 930 may also execute re-segmentation of RLC data PDUs for AM data transfers, reorder RLC data PDUs for UM and AM data transfers, detect duplicate data for UM and AM data transfers, discard RLC SDUs for UM and AM data transfers, detect protocol errors for AM data transfers, and perform RLC re-establishment.

[0159] Instance(s) of PDCP 940 may process requests from and provide indications to instance(s) of RRC 955 and/or instance(s) of SDAP 947 via one or more packet data convergence protocol service access points (PDCP- SAP) 945. These requests and indications communicated via PDCP-SAP 945 may comprise one or more radio bearers. The PDCP 940 may execute header compression and decompression of IP data, maintain PDCP Sequence Numbers (SNs), perform in-sequence delivery of upper layer PDUs at re-establishment of lower layers, eliminate duplicates of lower layer SDUs at re establishment of lower layers for radio bearers mapped on RLC AM, cipher and decipher control plane data, perform integrity protection and integrity verification of control plane data, control timer-based di scard of data, and perform security operati ons (e.g., ciphering, deciphering, integrity protection, integrity verification, etc.).

[0160] Instance(s) of SDAP 947 may process requests from and provide indications to one or more higher layer protocol entities via one or more SDAP-SAP 949. These requests and indications communicated via SDAP-SAP 949 may comprise one or more QoS flows. The SDAP 947 may map QoS flows to DRBs, and vice versa, and may also mark QFIs in DL and UL packets. A single SDAP entity 947 may be configured for an individual PDU session. In the UL direction, the NG-RAN 310 may control the mapping of QoS Flows to DRB(s) in two different ways, reflective mapping or explicit mapping. For reflective mapping, the SDAP 947 of a UE 301 may monitor the QFIs of the DL packets for each DRB, and may apply the same mapping for packets flowing in the UL direction. For a DRB, the SDAP 947 of the UE 301 may map the UL packets belonging to the QoS flows(s) corresponding to the QoS flow ID(s) and PDU session observed in the DL packets for that DRB. To enable reflective mapping, the NG-RAN 510 may mark DL packets over the Uu interface with a QoS flow ID. The explicit mapping may involve the RRC 955 configuring the SDAP 947 with an explicit QoS flow to DRB mapping rule, which may be stored and followed by the SDAP 947. In embodiments, the SDAP 947 may only be used in NR implementations and may not be used in LTE implementations.

[0161] The RRC 955 may configure, via one or more management service access points (M-SAP), aspects of one or more protocol layers, which may include one or more instances of PHY 910, MAC 920, RLC 930, PDCP 940 and SDAP 947. In embodiments, an instance of RRC 955 may process requests from and provide indications to one or more NAS entities 957 via one or more RRC-SAPs 956. The main services and functions of the RRC 955 may include broadcast of system information (e.g., included in MIBs or SIBs related to the NAS), broadcast of system information related to the access stratum ( AS), paging, establishment, maintenance and release of an RRC connection between the UE 301 and RAN 310 (e.g., RRC connection paging, RRC connection establishment,

RRC connection modification, and RRC connection release), establishment, configuration, maintenance and release of point to point Radio Bearers, security functions including key management, inter-RAT mobility, and measurement configuration for UE measurement reporting. The MIBs and SIBs may comprise one or more IEs, which may each comprise individual data fields or data structures.

[0162] The NAS 957 may form the highest stratum of the control plane between the UE

301 and the AMF 521. The NAS 957 may support the mobility of the UEs 301 and the session management procedures to establish and maintain IP connectivity between the UE 301 and a P-GW in LTE systems.

[0163] According to various embodiments, one or more protocol entities of arrangement

900 may be implemented in UEs 301, RAN nodes 311, AMF 521 in NR implementations or MME 421 in LTE implementations, UPF 502 in NR implementations or S-GW 422 and P-GW 423 in LTE implementations, or the like to be used for control plane or user plane communications protocol stack between the aforementioned devices. In such embodiments, one or more protocol entities that may be implemented in one or more of UE 301, gNB 311, AMF 521, etc. may communicate with a respective peer protocol entity that may be implemented in or on another device using the sendees of respective lower layer protocol entities to perform such communication. In some embodiments, a gNB-CU of the gNB 311 may host the RRC 955, SDAP 947, and PDCP 940 of the gNB that controls the operation of one or more gNB-DUs, and the gNB-DUs of the gNB 311 may each host the RLC 930, MAC 920, and PHY 910 of the gNB 311.

[0164] In a first example, a control plane protocol stack may comprise, in order from highest layer to lowest layer, NAS 957, RRC 955, PDCP 940, RLC 930, MAC 920, and PHY 910. In this example, upper layers 960 may be built on top of the NAS 957, which includes an IP layer 961, an SCTP 962, and an application layer signaling protocol (AP) 963.

[0165] In NR implementations, the AP 963 may be an NG application protocol layer

(NGAP or NG-AP) 963 for the NG interface 313 defined between the NG-RAN node 31 1 and the AMF 521, or the AP 963 may be an Xn application protocol layer (XnAP or Xn- AP) 963 for the Xn interface 312 that is defined between two or more RAN nodes 311.

[0166] The NG-AP 963 may support the functions of the NG interface 313 and may

comprise Elementary Procedures (EPs). An NG-AP EP may be a unit of interaction between the NG-RAN node 311 and the AMF 521. The NG-AP 963 services may comprise two groups: UE-associated services (e.g., services related to a UE 301, 302) and non-UE-associated services (e.g., services related to the whole NG interface instance between the NG-RAN node 311 and AMF 521). These services may include functions including, but not limited to: a paging functi on for the sending of paging requests to NG- RAN nodes 311 involved in a particular paging area; a UE context management function for allowing the AMF 521 to establish, modify, and/or release a UE context in the AMF 521 and the NG-RAN node 31 1; a mobility function for UEs 301 in ECM-CONNECTED mode for intra- system HOs to support mobility within NG-RAN and inter-system HOs to support mobility from/to EPS systems; a NAS Signaling Transport function for transporting or rerouting NAS messages between UE 301 and AMF 521; a NAS node selection function for determining an association between the AMF 521 and the UE 301; NG interface management function(s) for setting up the NG interface and monitoring for errors over the NG interface; a warning message transmission function for providing means to transfer warning messages via NG interface or cancel ongoing broadcast of warning messages; a Configuration Transfer function for requesting and transferring of RAN configuration information (e.g., SON information, performance measurement (PM) data, etc.) between two RAN nodes 311 via CN 320; and/or other like functions.

[0167] The XnAP 963 may support the functions of the Xn interface 312 and may

comprise XnAP basic mobility procedures and XnAP global procedures. The XnAP basic mobility procedures may comprise procedures used to handle UE mobility within the NG RAN 311 (or E-UTRAN 410), such as handover preparation and cancellation procedures, SN Status Transfer procedures, UE context retrieval and UE context release procedures, RAN paging procedures, dual connectivity related procedures, and the like. The XnAP global procedures may comprise procedures that are not related to a specific UE 301, such as Xn interface setup and reset procedures, NG-RAN update procedures, cell activation procedures, and the like.

[0168] In LIE implementations, the AP 963 may be an SI Application Protocol layer (Sl-AP) 963 for the SI interface 313 defined between an E-UTRAN node 311 and an MME, or the AP 963 may be an X2 application protocol layer (X2AP or X2-AP) 963 for the X2 interface 312 that is defined between two or more E-UTRAN nodes 311.

[0169] The SI Application Protocol layer (Sl-AP) 963 may support the functions of the SI interface, and similar to the NG-AP discussed previously, the Sl-AP may comprise Sl-AP EPs. An Sl-AP EP may be a unit of interaction between the E-UTRAN node 311 and an MME 421 within an LIE CN 320. The Sl -AP 963 services may comprise two groups: UE-associated services and non UE-associated services. These services perform functions including, but not limited to: E-UTRAN Radio Access Bearer (E-RAB) management, UE capability indication, mobility, NAS signaling transport, RAN

Information Management (RIM), and configuration transfer.

[0170] The X2AP 963 may support the functions of the X2 interface 312 and may

comprise X2AP basic mobility procedures and X2AP global procedures. The X2AP basic mobility procedures may comprise procedures used to handle UE mobility within the E- UTRAN 320, such as handover preparation and cancellation procedures, SN Status Transfer procedures, UE context retrieval and UE context release procedures, RAN paging procedures, dual connectivity related procedures, and the like. The X2AP global procedures may comprise procedures that are not related to a specific UE 301, such as X2 interface setup and reset procedures, load indication procedures, error indication procedures, cell activation procedures, and the like.

[0171] The SCTP layer (alternatively referred to as the SCTP/IP layer) 962 may provide guaranteed delivery of application layer messages (e g., NGAP or XnAP messages in NR implementations, or Sl-AP or X2AP messages in LIE implementations). The SCTP 962 may ensure reliable delivery of signaling messages between the RAN node 311 and the AMF 521/MME 421 based, in part, on the IP protocol, supported by the IP 961. The Internet Protocol layer (IP) 961 may be used to perform packet addressing and routing functionality. In some implementations the IP layer 961 may use point-to-point transmission to deliver and convey PDUs. In this regard, the RAN node 311 may comprise L2 and LI layer communication links (e.g., wired or wireless) with the

MME/AMF to exchange information.

[0172] In a second example, a user plane protocol stack may comprise, in order from

highest layer to lowest layer, SOAP 947, PDCP 940, RLC 930, MAC 920, and PHY 910. The user plane protocol stack may be used for communication between the UE 301, the RAN node 311, and UPF 502 in NR implementati ons or an S-GW 422 and P-GW 423 in LTE implementations. In this example, upper layers 951 may be built on top of the SDAP 947, and may include a user datagram protocol (UDP) and IP security layer (UDP/IP) 952, a General Packet Radio Service (GPRS) Tunneling Protocol for the user plane layer (GTP-U) 953, and a User Plane PDU layer (UP PDU) 963. [0173] The transport network layer 954 (also referred to as a“transport layer”) may be built on IP transport, and the GTP-U 953 may be used on top of the UDP/IP layer 952 (comprising a UDP layer and IP layer) to carry user plane PDUs (UP-PDUs). The IP layer (also referred to as the“Internet layer”) may be used to perform packet addressing and routing functionality. The IP layer may assign IP addresses to user data packets in any of IPv4, IPv6, or PPP formats, for example.

[0174] The GTP-U 953 may be used for carrying user data within the GPRS core network and between the radio access network and the core network. The user data transported can be packets in any of IPv4, IPv6, or PPP formats, for example. The UDP/IP 952 may provide checksums for data integrity, port numbers for addressing different functions at the source and destination, and encryption and authentication on the selected data flows. The RAN node 311 and the S-GW 422 may utilize an Sl-U interface to exchange user plane data via a protocol stack comprising an LI layer (e.g., PHY 910), an L2 layer (e.g., MAC 920, RLC 930, PDCP 940, and/or SDAP 947), the UDP/IP layer 952, and the GTP- U 953. The S-GW 422 and the P-GW 423 may utilize an S5/S8a interface to exchange user plane data via a protocol stack comprising an LI layer, an L2 layer, the UDP/IP layer 952, and the GTP-U 953. As discussed previously, NAS protocols may support the mobility of the UE 301 and the sessi on management procedures to establi sh and maintain IP connectivity between the UE 301 and the P-GW 423.

[0175] Moreover, although not shown by Figure 9, an application layer may be present above the AP 963 and/or the transport network layer 954. The application layer may be a layer in which a user of the UE 301, RAN node 311, or other network element interacts with software applications being executed, for example, by application circuitry 605 or application circuitry 705, respectively. The application layer may also provide one or more interfaces for software applications to interact with communications systems of the UE 301 or RAN node 311, such as the baseband circuitry 8110. In some implementations the IP layer and/or the application layer may provide the same or similar functionality as layers 5-7, or portions thereof, of the Open Systems Interconnection (OSI) model (e.g., OSI Layer 7 - the application layer, OSI Layer 6 - the presentation layer, and OSI Layer 5 - the session layer).

[0176] Figure 10 illustrates components of a core network in accordance with various embodiments. The components of the CN 420 may be implemented in one physical node or separate physical nodes including components to read and execute instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium). In embodiments, the components of CN 520 may be implemented in a same or similar manner as discussed herein with regard to the components of CN 420. In some embodiments, NFV is utilized to virtualize any or all of the above-described network node functions via executable instructions stored in one or more computer- readable storage mediums (described in further detail below). A logical instantiation of the CN 420 may be referred to as a network slice 1001, and individual logical instantiations of the CN 420 may provide specific network capabilities and network characteristics. A logical instantiation of a portion of the CN 420 may be referred to as a network sub-slice 1002 (e.g., the network sub-slice 1002 is shown to include the P-GW 423 and the PCRF 426).

[0177] As used herein, the terms“instantiate,”“instantiation,” and the like may refer to the creation of an instance, and an“instance” may refer to a concrete occurrence of an object, which may occur, for example, during execution of program code. A network instance may refer to information identifying a domain, which may be used for traffic detection and routing in case of different IP domains or overlapping IP addresses. A network slice instance may refer to a set of network functions (NFs) instances and the resources (e.g., compute, storage, and networking resources) required to deploy the network slice.

[0178] With respect to 5G systems (see, e.g., Figure 5), a network slice always comprises a RAN part and a CN part. The support of network slicing relies on the principle that traffic for different slices is handled by different PDU sessions. The network can realize the different network slices by scheduling and also by providing different L1/L2 configurations. The UE 501 provides assistance information for network slice selection in an appropriate RRC message, if it has been provided by NAS. While the network can support large number of slices, the UE need not support more than 8 slices

simultaneously.

[0179] A network slice may include the CN 520 control plane and user plane NFs, NG- RANs 510 in a serving PLMN, and a N3IWF functions in the serving PLMN. Individual network slices may have different S-NSSAI and/or may have different SSTs. NSSAI includes one or more S-NSSAIs, and each network slice is uniquely identified by an S- NSSAI. Network slices may differ for supported features and network functions optimizations, and/or multiple network slice instances may deliver the same

service/features but for different groups of UEs 501 (e.g., enterprise users). For example, individual network slices may deliver different committed service(s) and/or may be dedicated to a particular customer or enterprise. In this example, each network slice may have different S-NSSAIs with the same SST but with different slice differentiators.

Additionally, a single UE may be served with one or more network slice instances simultaneously via a 5G AN and associated with eight different S-NSSAIs. Moreover, an AMF 521 instance serving an indi vidual UE 501 may belong to each of the network slice instances serving that UE.

[0180] Network Slicing in the NG-RAN 510 involves RAN slice awareness. RAN slice awareness includes differentiated handling of traffic for different network slices, which have been pre-configured. Slice awareness in the NG-RAN 510 is introduced at the PDU session level by indicating the S-NSSAI corresponding to a PDU session in all signaling that includes PDU session resource information. How the NG-RAN 510 supports the slice enabling in terms of NG-RAN functions (e.g., the set of network functions that comprise each slice) is implementation dependent. The NG-RAN 510 selects the RAN part of the network slice using assistance information provided by the UE 501 or the 5GC 520, which unambiguously identifies one or more of the pre-configured network slices in the PLMN. The NG-RAN 510 also supports resource management and policy enforcement between slices as per SLAs. A single NG-RAN node may support multiple slices, and the NG-RAN 510 may also apply an appropriate RRM policy for the SLA in place to each supported slice. The NG-RAN 510 may also support QoS differentiation within a slice.

[0181] The NG-RAN 510 may also use the UE assistance information for the selection of an AMF 521 during an initial attach, if available. The NG-RAN 510 uses the assistance information for routing the initial NAS to an AMF 521. If the NG-RAN 510 is unable to select an AMF 521 using the assistance information, or the UE 501 does not provide any such information, the NG-RAN 510 sends the NAS signaling to a default AMF 521, which may be among a pool of AMFs 521. For subsequent accesses, the UE 501 provides a temp ID, which is assigned to the UE 501 by the 5GC 520, to enable the NG-RAN 510 to route the NAS message to the appropriate AMF 521 as long as the temp ID is valid. The NG-RAN 510 is aware of, and can reach, the AMF 521 that is associated with the temp ID. Otherwise, the method for initial attach applies.

[0182] The NG-RAN 510 supports resource isolation between slices. NG-RAN 510

resource isolation may be achieved by means of RRM policies and protection

mechanisms that should avoid that shortage of shared resources if one slice breaks the service level agreement for another slice. In some implementations, it is possible to fully dedicate NG-RAN 510 resources to a certain slice. How NG-RAN 510 supports resource isolation is implementation dependent.

[0183] Some slices may be available only in part of the network. Awareness in the NG-

RAN 510 of the slices supported in the cells of its neighbors may be beneficial for inter- frequency mobility in connected mode. The slice availability may not change within the UE’s registration area. The NG-RAN 510 and the 5GC 520 are responsible to handle a service request for a slice that may or may not be available in a given area. Admission or rejection of access to a slice may depend on factors such as support for the slice, availability of resources, support of the requested service by NG-RAN 510.

[0184] The UE 501 may be associated with multiple network slices simultaneously. In case the UE 501 is associated with multiple slices simultaneously, only one signaling connection is maintained, and for intra-frequency cell re selection, the UE 501 tries to camp on the best cell. For inter-frequency cell reselection, dedicated priorities can be used to control the frequency on which the UE 501 camps. The 5GC 520 is to validate that the UE 501 has the rights to access a network slice. Prior to receiving an Initial Context Setup Request message, the NG-RAN 510 may be allowed to apply some provisional/local policies, based on awareness of a particular slice that the UE 501 is requesting to access. During the initial context setup, the NG-RAN 510 is informed of the slice for which resources are being requested.

[0185] NFV architectures and infrastructures may be used to virtualize one or more NFs, alternatively performed by proprietary hardware, onto physical resources comprising a combination of industry-standard server hardware, storage hardware, or switches. In other words, NFV systems can be used to execute virtual or reconfigurable implementations of one or more EPC com ponents/ functi ons .

[0186] Figure 11 is a block diagram illustrating components, according to some example embodiments, of a system 1100 to support NFV. The system 1100 is illustrated as including a VIM 1102, an NFVI 1104, an VNFM 1106, VNFs 1108, an EM 1110, an NFVO 1112, and a NM 11 14.

[0187] The VIM 1102 manages the resources of the NFVI 1104. The NFVI 1104 can include physical or virtual resources and applications (including hypervisors) used to execute the system 1100. The VIM 1 102 may manage the life cycle of virtual resources with the NFVI 1104 (e.g., creation, maintenance, and tear down of VMs associated with one or more physical resources), track VM instances, track performance, fault and security of VM instances and associated physical resources, and expose VM instances and associated physical resources to other management systems.

[0188] The VNFM 1106 may manage the VNFs 1108. The VNFs 1108 may be used to execute EPC components/functions. The VNFM 1 106 may manage the life cycle of the VNFs 1108 and track performance, fault and security of the virtual aspects of VNFs 1108. The EM 1110 may track the performance, fault and security of the functional aspects of VNFs 1108. The tracking data from the VNFM 1106 and the EM 1110 may comprise, for example, PM data used by the VIM 1102 or the NFVI 1104. Both the VNFM 1106 and the EM 1110 can scale up/down the quantity of VNFs of the system 1100.

[0189] The NFVO 1112 may coordinate, authorize, release and engage resources of the NFVI 1104 in order to provide the requested service (e.g., to execute an EPC function, component, or slice). The NM 1114 may provide a package of end-user functions with the responsibility for the management of a network, which may include network elements with VNFs, non-virtualized network functions, or both (management of the VNFs may occur via the EM 1110).

[0190] Figure 12 is a block diagram illustrating components, according to some example embodiments, able to read instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium) and perform any one or more of the methodologies discussed herein. Specifically, Figure 12 shows a diagrammatic representation of hardware resources 12 1200 including one or more processors (or processor cores) 1210, one or more memory/storage devices 1220, and one or more communication resources 1230, each of which may be communicatively coupled via a bus 1240. For embodiments where node virtualization (e.g., NFV) is utilized, a hypervisor 1202 may be executed to provide an execution environment for one or more network slices/sub-slices to utilize the hardware resources 1200. [0191] The processors 1210 may include, for example, a processor 1212 and a processor

1214. The processor(s) 1210 may be, for example, a central processing unit (CPU), a reduced instruction set computing (RISC) processor, a complex instruction set computing (CISC) processor, a graphics processing unit (GPU), a DSP such as a baseband processor, an ASIC, an FPGA, a radio-frequency integrated circuit (RFIC), another processor (including those discussed herein), or any suitable combination thereof

[0192] The memory/storage devices 1220 may include main memory, disk storage, or any suitable combination thereof. The memory/storage devices 1220 may include, but are not limited to, any type of volatile or nonvolatile memory such as dynamic random access memory (DRAM), static random access memory (SRAM), erasable programmable read only memory (EPROM), electrically erasable programmable read-only memory

(EEPROM), Flash memory, solid-state storage, etc.

[0193] The communication resources 1230 may include interconnection or network

interface components or other suitable devices to communicate with one or more peripheral devices 1204 or one or more databases 1206 via a network 1208. For example, the communication resources 1230 may include wired communication components (e.g., for coupling via USB), cellular communication components, NFC components,

Bluetooth® (or Bluetooth® Low Energy) components, Wi-Fi® components, and other communication components..

[0194] Instructions 1250 may comprise software, a program, an application, an applet, an app, or other executable code for causing at least any of the processors 1210 to perform any one or more of the methodologies discussed herein. The instructions 1250 may reside, completely or partially, within at least one of the processors 1210 (e.g., within the processor’s cache memory), the memory/storage devices 1220, or any suitable

combination thereof. Furthermore, any portion of the instructions 1250 may be

transferred to the hardware resources 1200 from any combination of the peripheral devices 1204 or the databases 1206. Accordingly, the memory of processors 1210, the memory/storage devices 1220, the peripheral devices 1204, and the databases 1206 are examples of computer-readable and machine-readable media.

[0195] For one or more embodiments, at least one of the components set forth in one or more of the preceding figures may be configured to perform one or more operations, techniques, processes, and/or methods as set forth in the example section below. For example, the baseband circuitry as described above in connection with one or more of the preceding figures may be confi gured to operate in accordance with one or more of the examples set forth below. For another example, circuitry associated with a UE, base station, network element, etc. as described above in connection with one or more of the preceding figures may be configured to operate in accordance with one or more of the examples set forth below in the example section.

EXAMPLES

[0196] Example 1 may include the User Equipment (UE) compri sing the circuitry to determine a dynamic presence of phase tracking reference signal (PT-RS) based on a radio network temporary ID (RNTI) for modulation and coding scheme (MCS) table selection.

[0197] Example 2 may include the UE of example 1 or some other example herein,

wherein for the RNTI used to indicate a MCS table is applied to the cyclic redundant code (CRC) mask, the PT-RS may be present if PT-RS is enabled.

[0198] Example 3 may include the UE of example 1 or some other example herein,

wherein for the RNTI used to indicate a MCS table is applied to the cyclic redundant code (CRC) mask, the PT-RS should not be present.

[0199] Example 4 may include a UE comprising circuitry to determine a number of

uplink PT-RS ports for uplink codebook and non-codebook based transmission.

[0200] Example 5 may include the UE of example 4 or some other example herein,

wherein for 2-port based codebook based transmission, single PT-RS port could be used if PT-RS is enabled.

[0201] Example 6 may include the UE of example 4 or some other example, wherein for

2-port based codebook based transmission, the circuitry is to determine whether an indication that Transmission Rank Indicator (TRI)=1 or Transmission Precoder Matrix Index (TPMI)=0 is present; if the indication is present, the circuitry is to use two PT-RS ports; otherwise, the circuitry is to use a single PT-RS port.

[0202] Example 7 may include the UE of example 4 or some other example herein,

wherein the circuitry is to determine that a maximum number of PT-RS ports is smaller than that UE reported; and expect, based on said determination, that gNB should not indicate corresponding precoder that requires more PT-RS ports based on the number of PT-RS antenna ports it reported.

[0203] Example 8 may include the UE of example 4 or some other example herein,

wherein the circuitry is to expect that the maximum number of PT-RS ports shoul d be equal to that UE reported if PT-RS is enabled.

[0204] Example 9 may include the UE of example 4 or some other example herein,

wherein the circuitry is to determine DCI format 0_0 is used to schedule an uplink transmission; and use, based on said determination, a single PT-RS port, and associate the PT-RS with the Demodulation Reference Signal (DMRS) port.

[0205] Example 10 may include the UE of example 4 or some other example herein, wherein the circuitry is to expect the PT-RS port index configured in each SRS resources in a resource set for non-codebook based transmission is the same.

[0206] Example 11 may include the UE of example 10 or some other example herein, wherein the circuitry is to expect the PT-RS port index configured in each SRS resources in different resource set for non-codebook based transmission is different.

[0207] Example 12 may include the UE of example 1 or some other example herein, wherein for configured grant based transmission, if the PT-RS and DMRS port association is not configured but PT-RS is enabled, the circuitry is to assume a default association between PT-RS port and DMRS port.

[0208] Example 13 may include the UE of example 12 or some other example

herein, wherein the default association is based on a default value of the PTRS-DMRS association indication.

[0209] Example 14 may include the UE of example 13 or some other example herein, wherein the PTRS-DMRS association is based on the indication for grant based transmission.

[0210] Example 15 may include the UE of example 1 or some other example herein, wherein for configured grant based transmission, if the PT-RS and DMRS port association is not configured but PT-RS is enabled, the circuitry is to not transmit PT-RS.

[0211] Example 16 may include the UE of example 1 or some other example herein, wherein for configured grant based transmission, if PT-RS is enabled, the circuitry is to expect the PT-RS and DMRS port association should be configured. [0212] Example 17 may include a method comprising determining a dynamic presence of phase tracking reference signal (PT-RS) based on a radio network temporary ID (RNTI) for modulation and coding scheme (MCS) table selection.

[0213] Example 18 may include the method of example 17 or some other example herein, wherein for the RNTI used to indicate a MCS table is applied to the cyclic redundant code (CRC) mask, the PT-RS may be present if PT-RS is enabled.

[0214] Example 19 may include the method of example 17 or some other example herein, wherein for the RNTI used to indicate a MCS table is applied to the cyclic redundant code (CRC) mask, the PT-RS should not be present.

[0215] Example 20 may include a method comprising determining a number of

uplink PT-RS ports for uplink codebook and non-codebook based transmission.

[0216] Example 21 may include the method of example 20 or some other example herein, wherein for 2 port based codebook based transmission, single PT-RS port could be used if PT-RS is enabled.

[0217] Example 22 may include the method of example 20 or some other example,

wherein for 2 port based codebook based transmission, if Transmission Rank Indicator (TRI)=1 and Transmission Precoder Matrix Index (TPMI)=0 is indicated, the method include using two PT-RS ports; otherwise, the method in includes using a single PT-RS port.

[0218] Example 23 may include the method of example 20 or some other example herein, wherein if maximum number of PT-RS ports is smaller than that UE reported, the method includes expecting that gNB should not indicate corresponding precoder that requires more PT-RS ports based on the number of PT-RS antenna ports it reported.

[0219] Example 24 may include the method of example 20 or some other example herein, wherein the method includes expecting that the maximum number of PT-RS ports should be equal to that UE reported if PT-RS is enabled.

[0220] Example 25 may include the method of example 20 or some other example herein, wherein when DCI format 0_0 is used to schedule an uplink transmission, the method includes using a single PT-RS port, and associating the PT-RS with the Demodulation Reference Signal (DMRS) port. [0221] Example 26 may include the method of example 20 or some other example herein, wherein the method includes expecting the PT-RS port index configured in each SRS resources in a resource set for non-codebook based transmission should be the same.

[0222] Example 27 may include the method of example 26 or some other example herein, wherein the method includes expecting the PT-RS port index configured in each SRS resources in different resource set for non-codebook based transmission is different.

[0223] Example 28 may include the method of example 17 or some other example herein, wherein for configured grant based transmission, if the PT-RS and DMRS port association is not configured but PT-RS is enabled, the method includes assuming a default association between PT-RS port and DMRS port.

[0224] Example 29 may include the method of example 28 or some other example

herein, wherein the default association could be based on a default value of the PTRS- DMRS association indication.

[0225] Example 30 may include the method of example 29 or some other example herein, wherein the PTRS-DMRS association is based on the indication for grant based transmission.

[0226] Example 31 may include the method of example 17 or some other example herein, wherein for configured grant based transmission, if the PT-RS and DMRS port association is not configured but PT-RS is enabled, the method includes not transmitting PT-RS.

[0227] Example 32 may include the method of example 17 or some other example herein, wherein for configured grant based transmission, if PT-RS is enabled, the method includes expecting the PT-RS and DMRS port association is configured.

[0228] Example ZOl may include an apparatus comprising means to perform one or more elements of a method described in or related to any of examples 17-32, or any other method or process described herein.

[0229] Example Z02 may include one or more non-transitory computer-readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of a method described in or related to any of examples 17-32, or any other method or process described herein. [0230] Example Z03 may include an apparatus comprising logic, modules, or circuitry to perform one or more elements of a method described in or related to any of examples 17- 32, or any other method or process described herein.

[0231] Example Z04 may include a method, technique, or process as described in or related to any of examples 17-32, or portions or parts thereof.

[0232] Example Z05 may include an apparatus comprising: one or more processors and one or more com puter-readabl e media compri sing instructions that, when executed by the one or more processors, cause the one or more processors to perform the method, techniques, or process as described in or related to any of examples 17-32, or portions thereof.

[0233] Example Z06 may include a signal as described in or related to any of examples 1-

XYZ, or portions or parts thereof.

[0234] Example Z07 may include a signal in a wireless network as shown and described herein.

[0235] Example Z08 may include a method of communicating in a wireless network as shown and described herein.

[0236] Example Z09 may include a system for providing wireless communication as shown and described herein.

[0237] Example Z10 may include a device for providing wireless communication as shown and described herein.

[0238] Any of the above-described examples may be combined with any other example

(or combination of examples), unless explicitly stated otherwise. The foregoing description of one or more implementations provides illustration and description, but is not intended to be exhaustive or to limit the scope of embodiments to the precise form disclosed. Modifications and variations are possible in light of the above teachings or may be acquired from practice of various embodiments.

Abbreviations

[0239] For the purposes of the present document, the following abbreviations may apply to the examples and embodiments discussed herein, but are not meant to be limiting.

[0240] 3 GPP Third Generation Partnership Project

[0241] 4G Fourth Generation

[0242] 5G Fifth Generation [0243] 5GC 5G Core network

[0244] ACK Acknowl edgem en t

[0245] AF Application Function

[0246] AM Acknowledged Mode

[0247] AMBR Aggregate Maximum Bit Rate

[0248] AMF Access and Mobility Management Function

[0249] AN Access Network

[0250] ANR Automatic Neighbour Relation

[0251] AP Application Protocol, Antenna Port, Access Point

[0252] API Application Programming Interface

[0253] APN Access Point Name

[0254] ARP Allocation and Retention Priority

[0255] ARQ Automatic Repeat Request

[0256] AS Access Stratum

[0257] ASN. l Abstract Syntax Notation One

[0258] AUSF Authentication Server Function

[0259] AWGN Additive White Gaussian Noise

[0260] BCH Broadcast Channel

[0261] BER Bit Error Ratio

[0262] BFD Beam Failure Detection

[0263] BLER Block Error Rate

[0264] BPSK Binary Phase Shift Keying

[0265] BRAS Broadband Remote Access Server

[0266] BSS Business Support System

[0267] BS Base Station

[0268] BSR Buffer Status Report

[0269] BW Bandwidth

[0270] BWP Bandwidth Part

[0271] C-RNTI Cell Radio Network Temporary Identity

[0272] CA Carrier Aggregation, Certification Authority

[0273] CAPEX CAPital Expenditure

[0274] CBRA Contention Based Random Access [0275] cc Component Carrier, Country Code, Cryptographic Checksum

[0276] CCA Clear Channel Assessment

[0277] CCE Control Channel Element

[0278] CCCH Common Control Channel

[0279] CE Coverage Enhancement

[0280] CDM Content Delivery Network

[0281] CDMA Code-Division Multiple Access

[0282] CFRA Contention Free Random Access

[0283] CG Cell Group

[0284] Cl Cell Identity

[0285] CID Celi-ID (e.g., positioning method)

[0286] CIM Common Information Model

[0287] CIR Carrier to Interference Ratio

[0288] CK Cipher Key

[0289] CM Connection Management, Conditional Mandatory

[0290] CMAS Commercial Mobile Alert Service

[0291] CMD Command

[0292] CMS Cloud Management System

[0293] CO Conditional Optional

[0294] CoMP Coordinated Multi-Point

[0295] CORESET Control Resource Set

[0296] COTS Commercial Off-The-Shelf

[0297] CP Control Plane, Cyclic Prefix, Connection Point

[0298] CPD Connection Point Descriptor

[0299] CPE Customer Premise Equipment

[0300] CPICH Common Pilot Channel

[0301] CQI Channel Quality Indicator

[0302] CPU CSI processing unit, Central Processing Unit

[0303] C/R Command/Respon se field bit

[0304] CRAN Cloud Radio Access Network, Cloud RAN

[0305] CRB Common Resource Block

[0306] CRC Cyclic Redundancy Check [0307] CRI Channel- State Information Resource Indicator, CSI-RS Resource

Indicator

[0308] C-RNTI Cell RNTI

[0309] CS Circuit Switched

[0310] CSAR Cloud Service Archive

[0311] CSI Channel- State Information

[0312] CSI-IM CSI Interference Measurement

[0313] CSI-RS CSI Reference Signal

[0314] CSI-RSRP CSI reference signal received power

[0315] CSI-RSRQ CSI reference signal received quality

[0316] CSI-SINR CSI signal-to-noise and interference ratio

[0317] CSMA Carrier Sense Multiple Access

[0318] CSMA/CA CSMA with collision avoidance

[0319] CSS Common Search Space, Cell-specific Search Space

[0320] CTS Clear-to-Send

[0321] CW Codeword

[0322] CWS Contention Window Size

[0323] D2D Device-to-Device

[0324] DC Dual Connectivity, Direct Current

[0325] DCI Downlink Control Information

[0326] DF Deployment Flavour

[0327] DL Downlink

[0328] DM IT Distributed Management Task Force

[0329] DPDK Data Plane Development Kit

[0330] DM-RS, DMRS Demodulation Reference Signal

[0331] DN Data network

[0332] DRB Data Radio Bearer

[0333] DRS Discovery Reference Signal

[0334] DRX Discontinuous Reception

[0335] DSL Domain Specific Language. Digital Subscriber Line

[0336] DSLAM DSL Access Multiplexer

[0337] DwPTS Downlink Pilot Time Slot [0338] E-LAN Ethemet Local Area Network

[0339] E2E End-to-End

[0340] ECCA extended clear channel assessment, extended CCA

[0341] ECCE Enhanced Control Channel Element, Enhanced CCE

[0342] ED Energy Detection

[0343] EDGE Enhanced Datarates for GSM Evolution (GSM Evolution)

[0344] EGMF Exposure Governance Management Function

[0345] EGPRS Enhanced GPRS

[0346] EIR Equipment Identity Register

[0347] eLAA enhanced Licensed Assisted Access, enhanced LAA

[0348] EM Element Manager

[0349] eMBB Enhanced Mobile Broadband

[0350] EMS Element Management System

[0351] eNB evolved NodeB, E-UTRAN Node B

[0352] EN-DC E-UTRA-NR Dual Connectivity

[0353] EPC Evolved Packet Core

[0354] EPDCCH enhanced PDCCH, enhanced Physical Downlink Control Cannel

[0355] EPRE Energy per resource element

[0356] EPS Evolved Packet System

[0357] EREG enhanced REG, enhanced resource element groups

[0358] ETSI European Telecommunications Standards Institute

[0359] ETWS Earthquake and Tsunami Warning System

[0360] eUICC embedded UICC, embedded Universal Integrated Circuit Card

[0361] E-UTRA Evolved UTRA

[0362] E-UTRAN Evolved UTRAN

[0363] EV2X Enhanced V2X

[0364] FI AP FI Application Protocol

[0365] Fl-C FI Control plane interface

[0366] Fl-U FI User plane interface

[0367] FACCH Fast Associated Control CHannel

[0368] FACCFEF Fast Associated Control Channel/Full rate

[0369] FACCH/H Fast Associated Control Channel/Half rate [0370] FACH Forward Access Channel

[0371] FAUSCH Fast Uplink Signalling Channel

[0372] FB Functional Block

[0373] FBI Feedback Information

[0374] FCC Federal Communications Commission

[0375] FCCH Frequency Correction CHannel

[0376] FDD Frequency Division Duplex

[0377] FDM Frequency Division Multiplex

[0378] FDMA Frequency Division Multiple Access

[0379] FE Front End

[0380] FEC Forward Error Correction

[0381] FFS For Further Study

[0382] FFT Fast Fourier Transformation

[0383] feLAA further enhanced Licensed Assisted Access, further enhanced

LAA

[0384] FN Frame Number

[0385] FPGA Field-Programmable Gate Array

[0386] FR Frequency Range

[0387] G-RNTI GERAN Radio Network Temporary Identity

[0388] GERAN GSM EDGE R AN, GSM EDGE Radio Access Network

[0389] GGSN Gateway GPRS Support Node

[0390] GLONASS GLObal'naya NAvigatsionnaya Sputnikovaya Si sterna (Engl.:

Global Navigation Satellite System)

[0391] gNB Next Generation NodeB

[0392] gNB-CU gNB-centralized unit, Next Generation NodeB centralized unit

[0393] gNB -DU gNB-distributed unit, Next Generation NodeB distributed unit

[0394] GNSS Global Navigation Satellite System

[0395] GPRS General Packet Radio Service

[0396] GSM Global System for Mobile Communications, Groupe Special

Mobile

[0397] GTP GPRS Tunneling Protocol

[0398] GTP-U GPRS Tunnelling Protocol for User Plane [0399] GTS Go To Sleep Signal (related to WUS)

[0400] GUMMEI Globally Unique MME Identifier

[0401] GUTI Globally Unique Temporary UE Identity

[0402] HARQ Hybrid ARQ, Hybrid Automatic Repeat Request

[0403] HANDO, HO Handover

[0404] HFN HyperFrame Number

[0405] HHO Hard Handover

[0406] HLR Home Location Register

[0407] FIN Home Network

[0408] HO Handover

[0409] HPLMN Home Public Land Mobile Network

[0410] HSDPA High Speed Downlink Packet Access

[0411] HSN Hopping Sequence Number

[0412] HSPA High Speed Packet Access

[0413] HSS Home Subscriber Server

[0414] HSUPA High Speed Uplink Packet Access

[0415] HTTP Hyper Text Transfer Protocol

[0416] HTTPS Hyper Text Transfer Protocol Secure (https is http/1.1 over SSL, i.e. port 443)

[0417] I-Block Information Block

[0418] ICCID Integrated Circuit Card Identification

[0419] ICIC Inter-Cell Interference Coordination

[0420] ID Identity, identifier

[0421] IDFT Inverse Discrete Fourier Transform

[0422] IE Information element

[0423] IBE In-Band Emission

[0424] IEEE Institute of Electrical and Electronics Engineers

[0425] IEI Information Element Identifier

[0426] lEIDL Information Element Identifier Data Length

[0427] IETF Internet Engineering Task Force

[0428] IF Infrastructure

[0429] IM Interference Measurement, Intermodulation, IP Multimedia [0430] IMC IMS Credentials

[0431] IMEI International Mobile Equipment Identity

[0432] IMGI International mobile group identity

[0433] IMP! IP Multimedia Private Identity

[0434] IMPU IP Multimedia PUblic identity

[0435] IMS IP Multimedia Subsystem

[0436] IMSI International Mobile Subscriber Identity

[0437] IoT Internet of Things

[0438] IP Internet Protocol

[0439] Ip sec IP Security, Internet Protocol Security

[0440] IP-CAN IP-Connectivity Access Network

[0441] IP-M IP Multicast

[0442] IPv4 Internet Protocol Version 4

[0443] IPv6 Internet Protocol Version 6

[0444] IR Infrared

[0445] IS In Sync

[0446] IRP Integration Reference Point

[0447] ISDN Integrated Services Digital Network

[0448] ISIM IM Services Identity Module

[0449] ISO International Organisation for Standardisation

[0450] ISP Internet Service Provider

[0451] IWF Interworking-F uncti on

[0452] I -WLAN Interworking WEAN

[0453] K Constraint length of the convolutional code, USIM Individual key

[0454] kB Kilobyte (1000 bytes)

[0455] kbps kilo-bits per second

[0456] Kc Ciphering key

[0457] Ki Individual subscriber authentication key

[0458] KPI Key Performance Indicator

[0459] KQI Key Quality Indicator

[0460] KSI Key Set Identifier [0461] ksps kilo- symbols per second

[0462] KVM Kernel Virtual Machine

[0463] LI Layer 1 (physical layer)

[0464] Ll-RSRP Layer 1 reference signal received power

[0465] L2 Layer 2 (data link layer)

[0466] L3 Layer 3 (network layer)

[0467] LAA Licensed Assisted Access

[0468] LAN Local Area Network

[0469] LBT Listen Before Talk

[0470] LCM LifeCycle Management

[0471] LCR Low Chip Rate

[0472] LCS Location Services

[0473] LCID Logical Channel ID

[0474] LI Layer Indicator

[0475] LLC Logical Link Control, Low Layer Compatibility

[0476] LPLMN Local PLMN

[0477] LPP LTE Positioning Protocol

[0478] LSB Least Significant Bit

[0479] LTE Long Term Evolution

[0480] LWA LTE-WLAN aggregation

[0481] LWIP LTE/WLAN Radio Level Integration with IPsec Tunnel

[0482] LTE Long Term Evolution

[0483] M2M Machi ne-to-Machin e

[0484] MAC Medium Access Control (protocol layering context)

[0485] MAC Message authentication code (security/ en cry pti on context)

[0486] MAC-A MAC used for authentication and key agreement (TSG T WG3 context)

[0487] MAC -I MAC used for data integrity of signalling messages (TSG T

WG3 context)

[0488] MANO Management and Orchestration

[0489] MBMS Multimedia Broadcast and Multicast Service [0490] MBSFN Multimedia Broadcast multicast service Single Frequency

Network

[0491] MCC Mobile Country Code

[0492] MCG Master Cell Group

[0493] MCOT Maximum Channel Occupancy Time

[0494] MCS Modulation and coding scheme

[0495] MDAF Management Data Analytics Function

[0496] MDAS Management Data Analytics Service

[0497] MDT Minimization of Drive Tests

[0498] ME Mobile Equipment

[0499] MeNB master eNB

[0500] MER Message Error Ratio

[0501] MGL Measurement Gap Length

[0502] MGRP Measurement Gap Repetition Period

[0503] MIB Master Information Block, Management Information Base

[0504] MIMO Multiple Input Multiple Output

[0505] MLC Mobile Location Centre

[0506] MM Mobility Management

[0507] MME Mobility Management Entity

[0508] MN Master Node

[0509] MO Measurement Object, Mobile Originated

[0510] MPBCH MTC Physical Broadcast CHannel

[0511] MPDCCH MTC Physical Downlink Control CHannel

[0512] MPDSCH MTC Physical Downlink Shared CHannel

[0513] MPRACH MTC Physical Random Access CHannel

[0514] MPUSCH MTC Physical Uplink Shared Channel

[0515] MPLS Multiprotocol Label Switching

[0516] MS Mobile Station

[0517] MSB Most Significant Bit

[0518] MSC Mobile Switching Centre

[0519] MSI Minimum System Information, MCH Scheduling Information

[0520] MSID Mobile Station Identifier [0521] MSIN Mobile Station Identification Number

[0522] MS ISDN Mobile Subscriber ISDN Number

[0523] MT Mobile Terminated, Mobile Termination

[0524] MTC Machine-Type Communications

[0525] mMTC massive MTC, massive Machine-Type Communications

[0526] MU-MIMO Multi User MIMO

[0527] MWUS MTC wake-up signal, MTC WUS

[0528] NACK Negative Acknowledgement

[0529] NAI Network Access Identifier

[0530] NAS Non-Access Stratum, Non-Access Stratum layer

[0531] NCT Network Connectivity Topology

[0532] NEC Network Capability Exposure

[0533] NE-DC NR-E-UTRA Dual Connectivity

[0534] NEF Network Exposure Function

[0535] NF Network Function

[0536] NFP Network Forwarding Path

[0537] NFPD Network Forwarding Path Descriptor

[0538] NFV Network Functions Virtualization

[0539] NFVI NFV Infrastructure

[0540] NFVO NFV Orchestrator

[0541] NG Next Generation, Next Gen

[0542] NGEN-DC NG-RAN E-UTRA-NR Dual Connectivity

[0543] NM Network Manager

[0544] NMS Network Management System

[0545] N-PoP Network Point of Presence

[0546] NJVIIB, N-MIB Narrowband MIB

[0547] NPBCH Narrowband Physical Broadcast CHannel

[0548] NPDCCH Narrowband Physical Downlink Control CHannel

[0549] NPDSCH Narrowband Physical Downlink Shared CHannel

[0550] NPRACH Narrowband Physical Random Access CHannel

[0551] NPUSCH Narrowband Physical Uplink Shared CHannel

[0552] NPSS Narrowband Primary Synchronization Signal [0553] NSSS Narrowband Secondary Synchronization Signal

[0554] NR New Radio, Neighbour Relation

[0555] NRF NF Repository Function

[0556] MRS Narrowband Reference Signal

[0557] NS Network Service

[0558] NS A Non- Standalone operation mode

[0559] NSD Network Service Descriptor

[0560] NSR Network Service Record

[0561] NSSAI 'Network Slice Selection Assistance Information

[0562] S-NNSAI Single-NSSAI

[0563] NSSF Network Slice Selection Function

[0564] NW Network

[0565] NWUS Narrowband wake-up signal, Narrowband WUS

[0566] NZP Non-Zero Power

[0567] O&M Operation and Maintenance

[0568] ODU2 Optical channel Data Unit - type 2

[0569] OFDM Orthogonal Frequency Division Multiplexing

[0570] OFDMA Orthogonal Frequency Division Multiple Access

[0571] OOB Out-of-band

[0572] OOS Out of Sync

[0573] OPEX OPerating EXpense

[0574] OSI Other System Information

[0575] OSS Operations Support System

[0576] OTA Qver-the-air

[0577] PAPR Peak-to-Average Power Ratio

[0578] PAR Peak to Average Ratio

[0579] PBCII Physical Broadcast Channel

[0580] PC Power Control, Personal Computer

[0581] PCC Primary Component Carrier, Primary CC

[0582] PCell Primary Cell

[0583] PCI Physical Cell ID, Physical Cell Identity

[0584] PCEF Policy and Charging Enforcement Function [0585] PCF Policy Control Function

[0586] PCRF Policy Control and Charging Rules Function

[0587] PDCP Packet Data Convergence Protocol, Packet Data Convergence

Protocol layer

[0588] PDCCH Physical Downlink Control Channel

[0589] PDCP Packet Data Convergence Protocol

[0590] PDN Packet Data Network, Public Data Network

[0591] PDSCH Physical Downlink Shared Channel

[0592] PDU Protocol Data Unit

[0593] PEI Permanent Equipment Identifiers

[0594] PFD Packet Flow Description

[0595] P-GW PDN Gateway

[0596] PHICH Physical hybrid-ARQ indicator channel

[0597] PHY Physical layer

[0598] PLMN Public Land Mobile Network

[0599] PIN Personal Identification Number

[0600] PM Performance Measurement

[0601] PMI Precoding Matrix Indicator

[0602] PNF Physical Network Function

[0603] PNFD Physical Network Function Descriptor

[0604] PNFR Physical Network Function Record

[0605] POC PTT over Cellular

[0606] pp p T p Point-to-Point

[0607] PPP Point-to-Point Protocol

[0608] PRACH Physical RACH

[0609] PRB Physical resource block

[0610] PRO Physical resource block group

[0611] ProSe Proximity Services, Proximity-Based Service

[0612] PRS Positioning Reference Signal

[0613] PRR Packet Reception Radio

[0614] PS Packet Services

[0615] PSBCH Physical Sidelink Broadcast Channel [0616] PSDCH Physical Sidelink Downlink Channel

[0617] PSCCH Physical Sidelink Control Channel

[0618] PSSCH Physical Sidelink Shared Channel

[0619] PSCell Primary SCell

[0620] PSS Primary Synchronization Signal

[0621] PSTN Public Switched Telephone Network

[0622] PT-RS Phase-tracking reference signal

[0623] PIT Push-to-Talk

[0624] PUCCH Physical Uplink Control Channel

[0625] PUSCH Physical Uplink Shared Channel

[0626] QAM Quadrature Amplitude Modulation

[0627] QCI QoS class of identifier

[0628] QCL Quasi co-location

[0629] QFI QoS Flow ID, QoS Flow Identifier

[0630] QoS Quality of Service

[0631] QPSK Quadrature (Quaternary) Phase Shift Keying

[0632] QZSS Quasi -Zenith Satellite System

[0633] RA-RNTI Random Access RNTI

[0634] RAB Radio Access Bearer, Random Access Burst

[0635] RACH Random Access Channel

[0636] RADIUS Remote Authentication Dial In User Service

[0637] RAN Radio Access Network

[0638] RAND RANDom number (used for authentication)

[0639] RAR Random Access Response

[0640] RAT Radio Access Technology

[0641] RAU Routing Area Update

[0642] RB Resource block, Radio Bearer

[0643] RBG Resource block group

[0644] REG Resource Element Group

[0645] Rel Release

[0646] REQ REQuest

[0647] RF Radio Frequency [0648] RI Rank Indicator

[0649] RIV Resource indicator value

[0650] RL Radio Link

[0651] RLC Radio Link Control, Radio Link Control layer

[0652] RLC AM RLC Acknowledged Mode

[0653] RLC UM RLC Unacknowledged Mode

[0654] RLF Radio Link Failure

[0655] RLM Radio Link Monitoring

[0656] RLM-RS Reference Signal for RLM

[0657] RM Registration Management

[0658] RMC Reference Measurement Channel

[0659] RMSI Remaining MSI, Remaining Minimum System Information

[0660] RN Relay Node

[0661] RNC Radio Network Controller

[0662] RNL Radio Network Layer

[0663] RNTI Radio Network Temporary Identifier

[0664] ROHC RObust Header Compression

[0665] RRC Radio Resource Control, Radio Resource Control layer

[0666] RRM Radio Resource Management

[0667] RS Reference Signal

[0668] RSRP Reference Signal Received Power

[0669] RSRQ Reference Signal Received Quality

[0670] RSSI Received Signal Strength Indicator

[0671] RSU Road Side Unit

[0672] RSTD Reference Signal Time difference

[0673] RTF Real Time Protocol

[0674] RTS Ready-To-Send

[0675] RTT Round Trip Time

[0676] Rx Reception, Receiving, Receiver

[0677] S1AP SI Application Protocol

[0678] Sl-MME SI for the control plane

[0679] Sl-U SI for the user plane [0680] S-GW Serving Gateway

[0681] S-RNTI SRNC Radio Network Temporary Identity

[0682] S-TMSI SAE Temporary Mobile Station Identifier

[0683] SA Standalone operation mode

[0684] SAE System Architecture Evolution

[0685] SAP Service Access Point

[0686] SAPD Service Access Point Descriptor

[0687] SAPI Service Access Point Identifier

[0688] see Secondary Component Carrier, Secondary CC

[0689] SCell Secondary Cell

[0690] SC-FDMA Single Carrier Frequency Division Multiple Access

[0691] SCG Secondary Cell Group

[0692] SCM Security Context Management

[0693] SCS Subcarrier Spacing

[0694] SCTP Stream Control Transmission Protocol

[0695] SOAP Service Data Adaptation Protocol, Service Data Adaptation

Protocol layer

[0696] SDL Supplementary Downlink

[0697] SDNF Structured Data Storage Network Function

[0698] SDP Service Discovery Protocol (Bluetooth related)

[0699] SDSF Structured Data Storage Function

[0700] SDU Service Data Unit

[0701] SEAF Security Anchor Function

[0702] SeNB secondary eNB

[0703] SEPP Security Edge Protection Proxy

[0704] SFI Slot format indication

[0705] SFTD Space-Frequency Time Diversity, SFN and frame timing difference

[0706] SFN System Frame Number

[0707] SgNB Secondary gNB

[0708] SGSN Serving GPRS Support Node

[0709] S-GW Serving Gateway [0710] SI System Information

[0711] SI-RNTI System Information RNTI

[0712] SIB System Information Block

[0713] SIM Subscriber Identity Module

[0714] SIP Session Initiated Protocol

[0715] SiP System in Package

[0716] Si . Sidelink

[0717] SLA Service Level Agreement

[0718] SM Session Management

[0719] SMF Session Management Function

[0720] SMS Short Message Service

[0721] SMSF SMS Function

[0722] SMTC SSB-based Measurement Timing Configuration

[0723] SN Secondary Node, Sequence Number

[0724] SoC System on Chip

[0725] SON Self-Organizing Network

[0726] SpCell Special Cell

[0727] SP-C SI-RNTI Semi-Persistent CSI RNTI

[0728] SPS Semi-Persistent Scheduling

[0729] SQN Sequence number

[0730] SR Scheduling Request

[0731] SRB Signalling Radio Bearer

[0732] SRS Sounding Reference Signal

[0733] ss Synchronization Signal

[0734] SSB Synchronization Signal Block, SS/PBCH Block

[0735] SSBRI SS/PBCH Block Resource Indicator, Synchronization Signal

Block Resource Indicator

[0736] ssc Session and Service Continuity

[0737] SS-RSRP Synchronization Signal based Reference Signal Received Power

[0738] SS-RSRQ Synchronization Signal based Reference Signal Received Quality

[0739] SS-SINR Synchronization Signal based Signal to Noise and Interference

Ratio [0740] sss Secondary Synchronization Signal

[0741] SSSG Search Space Set Group

[0742] SSSIF Search Space Set Indicator

[0743] SST Slice/Service Types

[0744] SU-MIMO Single User MIMO

[0745] SUL Supplementary Uplink

[0746] TA Timing Advance, Tracking Area

[0747] TAG Tracking Area Code

[0748] TAG Timing Advance Group

[0749] TAU Tracking Area Update

[0750] TB Transport Block

[0751] TBS Transport Block Size

[0752] TBD To Be Defined

[0753] Tci Transmission Configuration Indicator

[0754] TCP Transmission Communication Protocol

[0755] TDD Time Division Duplex

[0756] TDM Time Division Multiplexing

[0757] TDMA Time Division Multiple Access

[0758] TE Terminal Equipment

[0759] TEID Tunnel End Point Identifier

[0760] TFT Traffic Flow Template

[0761] TMSI Temporary Mobile Subscriber Identity

[0762] TNL Transport Network Layer

[0763] TPC Transmit Power Control

[0764] TPM I Transmitted Precoding Matrix Indicator

[0765] TR Technical Report

[0766] TRP, TRxP Transmission Reception Point

[0767] TRS Tracking Reference Signal

[0768] TRx Transceiver

[0769] TS Technical Specifications, Technical Standard

[0770] TTI Transmission Time Interval

[0771] Tx Transmission, Transmitting, Transmitter [0772] U-RNTI UTRAN Radio Network Temporary Identity

[0773] UART Universal Asynchronous Receiver and Transmitter

[0774] UCI Uplink Control Information

[0775] UE User Equipment

[0776] UDM Unified Data Management

[0777] UDP User Datagram Protocol

[0778] UDSF Unstructured Data Storage Network Function

[0779] UICC Universal Integrated Circuit Card

[0780] UL Uplink

[0781] UM Unacknowledged Mode

[0782] UML Unified Modelling Language

[0783] UMTS Universal Mobile Telecommunications System

[0784] UP User Plane

[0785] UPF User Plane Function

[0786] UEI Uniform Resource Identifier

[0787] URL Uniform Resource Locator

[0788] URLLC Ultra-Reliable and Low Latency

[0789] USB Universal Serial Bus

[0790] USIM Universal Subscriber Identity Module

[0791] uss UE-specific search space

[0792] UTRA UMTS Terrestrial Radio Access

[0793] UTRAN Universal Terrestrial Radio Access Network

[0794] UwPTS Uplink Pilot Time Slot

[0795] V2I V ehi cl e-to-Infrastruction

[0796] V2P Vehicl e-to-Pedestri an

[0797] V2V Vehicle-to-V ehi cl e

[0798] V2X Vehi cle-to-everything

[0799] VIM Virtualized Infrastructure Manager

[0800] VL Virtual Link,

[0801] VLAN Virtual LAN, Virtual Local Area Network

[0802] VM Virtual Machine

[0803] VNF Virtualized Network Function [0804] VNFFG VNF Forwarding Graph

[0805] VNFFGD VNF Forwarding Graph Descriptor

[0806] VNFM VNF Manager

[0807] VoIP Voice-over-IP, Voice-over-Internet Protocol

[0808] VPLMN Visited Public Land Mobile Network

[0809] VPN Virtual Private Network

[0810] VRB Virtual Resource Block

[0811] WiMAX Worldwide Interoperability for Microwave Access

[0812] WLAN Wireless Local Area Network

[0813] WMAN Wireless Metropolitan Area Network

[0814] WPAN Wireless Personal Area Network

[0815] X2-C X2-Control plane

[0816] X2-U X2-User plane

[0817] XML extensible Markup Language

[0818] XRES Expected user RESponse

[0819] XOR exclusive OR

[0820] ZC Zadoff-Chu

[0821] ZP Zero Power

Terminology

[0822] For the purposes of the present document, the following terms and definitions are applicable to the examples and embodiments discussed herein, but are not meant to be limiting.

[0823] The term“circuitry” as used herein refers to, is part of, or includes hardware

components such as an electronic circuit, a logic circuit, a processor (shared, dedicated, or group) and/or memory (shared, dedicated, or group), an Application Specific Integrated Circuit (ASIC), a field-programmable device (FPD) (e.g., a field-programmable gate array (FPGA), a programmable logic device (PLD), a complex PLD (CPLD), a high- capacity PLD (HCPLD), a structured ASIC, or a programmable SoC), digital signal processors (DSPs), etc., that are configured to provide the described functionality. In some embodiments, the circuitry may execute one or more software or firmware programs to provide at least some of the described functionality. The term“circuitry” may also refer to a combination of one or more hardware elements (or a combination of circuits used in an electrical or electronic system) with the program code used to carry out the functi onality of that program code. In these embodiments, the combination of hardware elements and program code may be referred to as a particular type of circuitry.

[0824] The term“processor circuitry” as used herein refers to, is part of, or includes

circuitry capable of sequentially and automatically carrying out a sequence of arithmetic or logical operations, or recording, storing, and/or transferring digital data. The term “processor circuitry” may refer to one or more application processors, one or more baseband processors, a physical central processing unit (CPU), a single-core processor, a dual-core processor, a triple-core processor, a quad-core processor, and/or any other device capable of executing or otherwise operating computer-executable instructions, such as program code, software modules, and/or functional processes. The terms “application circuitry” and/or“baseband circuitry” may be considered synonymous to, and may be referred to as,“processor circuitry.”

[0825] The term“interface circuitry” as used herein refers to, is part of, or includes

circuitry that enables the exchange of information between two or more components or devices. The term“interface circuitry” may refer to one or more hardware interfaces, for example, buses, I/O interfaces, peripheral component interfaces, network interface cards, and/or the like.

[0826] The term“user equipment” or“UE” as used herein refers to a device with radio communication capabiliti es and may describe a remote user of network resources in a communications network. The term“user equipment” or“UE” may be considered synonymous to, and may be referred to as, client, mobile, mobile device, mobile terminal, user terminal, mobile unit, mobile station, mobile user, subscriber, user, remote station, access agent, user agent, receiver, radio equipment, reconfigurable radio equipment, reconfigurable mobile device, etc. Furthermore, the term“user equipment” or“UE” may include any type of wireless/wired device or any computing device including a wireless communications interface.

[0827] The term“network element” as used herein refers to physical or virtualized

equipment and/or infrastructure used to provide wired or wireless communication network services. The term“network element” may be considered synonymous to and/or referred to as a networked computer, networking hardware, network equipment, network node, router, switch, hub, bridge, radio network controller, RAN device, RAN node, gateway, server, virtualized VNF, NFVI, and/or the like.

[0828] The term“computer system” as used herein refers to any type interconnected electronic devices, computer devices, or components thereof. Additionally, the term “computer system” and/or“system” may refer to various components of a computer that are communicatively coupled with one another. Furthermore, the term“computer system” and/or“system” may refer to multiple computer devices and/or multiple computing systems that are communicatively coupled with one another and configured to share computing and/or networking resources.

[0829] The term“appliance,”“computer appliance,” or the like, as used herein refers to a computer device or computer system with program code (e.g., software or firmware) that is specifically designed to provide a specific computing resource. A“virtual appliance” is a virtual machine image to be implemented by a hypervisor-equipped device that virtualizes or emulates a computer appliance or otherwise is dedicated to provide a specific computing resource.

[0830] The term“resource” as used herein refers to a physical or virtual device, a

physical or virtual component within a computing environment, and/or a physical or virtual component within a particular device, such as computer devices, mechanical devices, memory space, processor/CPU time, processor/CPU usage, processor and accelerator loads, hardware time or usage, electrical power, input/output operations, ports or network sockets, channel/link allocation, throughput, memory usage, storage, network, database and applications, workload units, and/or the like. A“hardware resource” may refer to compute, storage, and/or network resources provided by physical hardware element(s). A“virtualized resource” may refer to compute, storage, and/or network resources provided by virtualization infrastructure to an application, device, system, etc. The term“network resource” or“communication resource” may refer to resources that are accessible by computer devices/systems via a communications network. The term “system resources” may refer to any kind of shared entities to provide services, and may include computing and/or network resources. System resources may be considered as a set of coherent functions, network data objects or services, accessible through a server where such system resources reside on a single host or multiple hosts and are clearly identifiable. [0831] The term“channel” as used herein refers to any transmission medium, either tangible or intangible, which is used to communicate data or a data stream. The term “channel” may be synonymous with and/or equivalent to“communications channel,” “data communications channel,”“transmission channel,”“data transmission channel,” “access channel,”“data access channel,”“link,”“data link,”“carrier,”“radiofrequency carrier,” and/or any other like term denoting a pathway or medium through which data is communicated. Additionally, the term“link” as used herein refers to a connection between two devices through a RAT for the purpose of transmitting and receiving information.

[0832] The terms“instantiate,”“instantiation,” and the like as used herein refers to the creation of an instance. An“instance” also refers to a concrete occurrence of an object, which may occur, for example, during execution of program code.

[0833] The terms“coupled,”“communicatively coupled,” along with derivatives thereof are used herein. The term“coupled” may mean two or more elements are in direct physical or electrical contact with one another, may mean that two or more elements indirectly contact each other but still cooperate or interact with each other, and/or may mean that one or more other elements are coupled or connected between the elements that are said to be coupled with each other. The term“directly coupled” may mean that two or more elements are in direct contact with one another. The term“communicatively coupled” may mean that two or more elements may be in contact with one another by a means of communication including through a wire or other interconnect connection, through a wireless communication channel or ink, and/or the like.

[0834] The term“information element” refers to a structural element containing one or more fields. The term“field” refers to individual contents of an information element, or a data element that contains content.

[0835] The term“SMTC” refers to an SSB-based measurement timing configuration configured by SSB-MeasurementTimingConfiguration.

[0836] The term“SSB” refers to an SS/PBCH block.

[0837] The term“a“Primary Cell” refers to the MCG cell, operating on the primary- frequency, in which the IJE either performs the initial connection establishment procedure or initiates the connection re-establishment procedure. [0838] The term“Primary SCG Cell” refers to the SCG cell in which the UE performs random access when performing the Reconfiguration with Sync procedure for DC operation.

[0839] The term“Secondary Cell” refers to a cell providing additional radio resources on top of a Special Cell for a UE configured with CA.

[0840] The term“Secondary Cell Group” refers to the subset of serving cells comprising the PSCell and zero or more secondary cells for a UE configured with DC.

[0841] The term“Serving Cell” refers to the primary cell for a UE in

RRC_C O NNEC TED not configured with CA/DC there is only one serving cell comprising of the primary cell.

[0842] The term“serving cell” or“serving cells” refers to the set of cells comprising the

Special Cell(s) and all secondary cells for a UE in RRC CONNECTED configured with CA/.

[0843] The term“Special Cell” refers to the PCell of the MCG or the PSCell of the SCG for DC operation; otherwise, the term“Special Cell” refers to the Pcell.