HAKOLA SAMI-JUKKA (FI)
NOKIA ET AL: "Extending 8 SSB support to the TDD bands with newly introduced 30 kHz Case C SSB pattern", vol. TSG RAN, no. e-Meeting; 20200914 - 20200918, 7 September 2020 (2020-09-07), XP051931511, Retrieved from the Internet
CLAIMS What is claimed is: 1. A method comprising: detecting at least one synchronization signal and physical broadcast channel block during searching for a synchronization signal associated with a cell in a communication network; determining a configuration related to whether or not a discovery burst transmission window is used for the cell; determining, based on the configuration, whether or not the discovery burst transmission window is used for the cell; and determining at least one assumption to use when monitoring and detecting the synchronization signal and physical broadcast channel block, based on whether or not the discovery burst transmission window is used for the cell. 2. The method of claim 1, wherein the configuration comprises at least one synchronization raster position of at least one synchronization raster being allocated separately in frequency when the discovery burst transmission window is used for the cell and when the discovery burst transmission window is not used for the cell; determining, based on the at least one synchronization raster position within the at least one synchronization signal and physical broadcast channel block, whether or not the discovery burst transmission window is used for the cell. 3. The method of claim 2, wherein the configuration comprises being provided for an unlicensed band or a licensed band to the at least one synchronization raster; wherein a first set of the at least one synchronization raster position is used when the discovery burst transmission window is used for the cell; and wherein a second set of the at least one synchronization raster position is used when the discovery burst transmission window is not used for the cell. 4. The method of any one of claims 2 to 3, wherein the at least one synchronization raster position is identified with a global synchronization channel number. 5. The method of any one of claims 1 to 4, wherein the configuration comprises a mapping between at least one resource element index of the at least one synchronization signal and physical broadcast channel block and a respective at least one global synchronization channel number location; wherein a first one of the at least one global synchronization channel number location is associated with the discovery burst transmission window being used for the cell; and wherein a second one of the at least one global synchronization channel number location is associated with the discovery burst transmission window not being used for the cell. 6. The method of claim 5, wherein the first one of the at least one global synchronization channel number location is in a middle of the at least one synchronization signal and physical broadcast channel block; and wherein the second one of the at least one global synchronization channel number location is in an edge of the at least one synchronization signal and physical broadcast channel block. 7. The method of any one of claims 5 to 6, wherein the at least one resource element index is a subcarrier number of a synchronization signal and physical broadcast channel block. 8. The method of any one of claims 1 to 7, wherein the configuration comprises at least one synchronization signal and physical broadcast channel block to control resource set number zero starting physical resource block offset being associated to the case that the discovery burst transmission window is enabled; wherein the configuration comprises the at least one synchronization signal and physical broadcast channel block to control resource set number zero starting physical resource block offset being associated to the case that the discovery burst transmission window is not used for the at least one synchronization signal and physical broadcast channel block; and the method further comprising determining whether or not the discovery burst transmission window is used for the cell following detection of the at least one synchronization signal and physical broadcast channel block. 9. The method of any one of claims 1 to 8, wherein determining the configuration comprises determining at least one synchronization signal and physical broadcast channel block offset value in a physical broadcast channel, wherein a subset of the at least one synchronization signal and physical broadcast channel block offset value is used to indicate that the discovery burst transmission window is used for the cell. 10. The method of claim 9, wherein determining the configuration further comprises determining, for operation at shared spectrum access, for band operation at a given frequency, that the discovery burst transmission window is not used for the cell when the at least one synchronization signal and physical broadcast channel block offset value is greater than an amount relative to a subcarrier zero in a common resource block. 11. The method of any one of claims 9 to 10, wherein a subset of the at least one synchronization signal and physical broadcast channel block offset value is used to indicate that the discovery burst transmission window is not used for the cell. 12. The method of any one of claims 1 to 11, wherein the configuration comprises at least one control resource set type zero physical downlink control channel configuration index in a physical broadcast channel associated either to the discovery burst transmission window being in use or not being in use; wherein the determining of whether or not the discovery burst transmission window is used for the cell is based on the configuration index. 13. The method of claim 12, wherein a first subset of the at least one control resource set type zero physical downlink control channel configuration index is associated with the discovery burst transmission window being in use; and wherein a second subset of the at least one control resource set type zero physical downlink control channel configuration index is associated with the discovery burst transmission window not being in use. 14. The method of any one of claims 1 to 13, wherein the configuration comprises: a half-frame indication being omitted for operation for at least one frequency band, wherein at least one location of the at least one synchronization signal and physical broadcast channel block is assumed to be within a predetermined half frame; and an adapted half-frame bit in a physical broadcast channel payload that indicates whether or not the discovery burst transmission window is used for the cell. 15. The method of claim 14, wherein the at least one frequency band is an unlicensed band or a licensed band. 16. The method of any one of claims 1 to 15, wherein the configuration comprises: a common sub-carrier spacing indication being omitted for a frequency band operation, wherein sub-carrier spacing of common signals is assumed to be determined based on at least one sub-carrier spacing of the at least one synchronization signal and physical broadcast channel block; and an adapted common sub-carrier spacing indication bit in a physical broadcast channel payload that indicates whether or not the discovery burst transmission window is used for the cell. 17. The method of any one of claims 1 to 16, wherein the configuration comprises: at least one physical cell identifier being adapted to indicate whether or not the discovery burst transmission window is used; wherein a subset of the at least one physical cell identifier is assigned for the discovery burst transmission window being used or the discovery burst transmission window not being used. 18. The method of any one of claims 1 to 17, wherein the configuration comprises: at least one primary synchronization signal or at least one secondary synchronization signal being adjusted to indicate whether or not the discovery burst transmission window is used; wherein a sequence generation of the at least one primary synchronization signal in the at least one synchronization signal and physical broadcast channel block is adapted to account for discovery burst transmission window use indication; or a sequence generation of the at least one secondary synchronization signal in the at least one synchronization signal and physical broadcast channel block is adapted to account for discovery burst transmission window use indication. 19. The method of claim 18, wherein the configuration comprises adjusting a cyclic shift of either the sequence generation of the at least one primary synchronization signal or the sequence generation of the at least one secondary synchronization signal. 20. The method of any one of claims 1 to 19, performed by a user equipment. 21. The method of any one of claims 1 to 20, wherein a user equipment uses information related to whether or not the discovery burst transmission window is used for the cell, to adjust a search and monitoring of the synchronization signal and physical broadcast channel block. 22. The method of claim 21, wherein the search and monitoring of the synchronization signal and physical broadcast channel block comprises at least one of: a number of synchronization signal and physical broadcast channel block positions; a location of synchronization signal and physical broadcast channel block time locations; or a time window duration of a possible synchronization signal and physical broadcast channel block transmission. 23. The method of any one of claims 21 to 22, wherein a user equipment uses the information of whether or not the discovery burst transmission window is used for the cell, to determine how to interpret a synchronization signal and physical broadcast channel block content/information payload. 24. The method of any one of claims 3 to 23, wherein the unlicensed band is a band restricted/intended for operation with shared spectrum channel access. 25. A method comprising: providing at least one synchronization signal and physical broadcast channel block or signaling used to search for a synchronization signal associated with a cell in a communication network; providing a configuration related to whether or not a discovery burst transmission window is used for the cell; wherein the configuration is used in a determination of whether or not the discovery burst transmission window is used for the cell; and wherein the configuration is used in a determination of at least one assumption to use for a monitoring and a detection of the synchronization signal and physical broadcast channel block. 26. The method of claim 25, wherein the configuration comprises at least one synchronization raster position of at least one synchronization raster being allocated separately in frequency when the discovery burst transmission window is used for the cell and when the discovery burst transmission window is not used for the cell. 27. The method of claim 26, wherein the configuration comprises providing a user equipment for an unlicensed band or a licensed band to the at least one synchronization raster; wherein a first set of the at least one synchronization raster position is used when the discovery burst transmission window is used for the cell; and wherein a second set of the at least one synchronization raster position is used when the discovery burst transmission window is not used for the cell. 28. The method of any one of claims 26 to 27, wherein the at least one synchronization raster position is identified with a global synchronization channel number. 29. The method of any one of claims 25 to 28, wherein the configuration comprises a mapping between the at least one resource element index of the at least one synchronization signal and physical broadcast channel block and a respective at least one global synchronization channel number location; wherein a first one of the at least one global synchronization channel number location is associated with the discovery burst transmission window being used for the cell; and wherein a second one of the at least one global synchronization channel number location is associated with the discovery burst transmission window not being used for the cell. 30. The method of claim 29, wherein the first one of the at least one global synchronization channel number location is in a middle of the at least one synchronization signal and physical broadcast channel block; and wherein the second one of the at least one global synchronization channel number location is in an edge of the at least one synchronization signal and physical broadcast channel block. 31. The method of any one of claims 25 to 30, wherein the at least one resource element index is a subcarrier number of a synchronization signal and physical broadcast channel block. 32. The method of any one of claims 25 to 31, wherein the configuration comprises at least one synchronization signal and physical broadcast channel block to control resource set number zero starting physical resource block offset being associated to the case that the discovery burst transmission window is enabled; and wherein the configuration comprises the at least one synchronization signal and physical broadcast channel block to control resource set number zero starting physical resource block offset being associated to the case that the discovery burst transmission window is not used for the at least one synchronization signal and physical broadcast channel block. 33. The method of any one of claims 25 to 32, wherein the configuration comprises at least one synchronization signal and physical broadcast channel block offset value in the physical broadcast channel, wherein a subset of the at least one synchronization signal and physical broadcast channel block offset value is used to indicate that the discovery burst transmission window is used for the cell. 34. The method of claim 33, wherein the configuration further comprises, for operation at shared spectrum access, for band operation at a given frequency, that the discovery burst transmission window is not used for the cell when the at least one synchronization signal and physical broadcast channel block offset value is greater than an amount relative to a subcarrier zero in a common resource block. 35. The method of any one of claims 33 to 34, wherein a subset of the at least one synchronization signal and physical broadcast channel offset value is used to indicate that the discovery burst transmission window is not used for the cell. 36. The method of any one of claims 25 to 35, wherein the configuration comprises at least one control resource set type zero physical downlink control channel configuration index in a physical broadcast channel associated either to the discovery burst transmission window being in use or not being in use. 37. The method of claim 36, wherein a first subset of the at least one control resource set type zero physical downlink control channel configuration index is associated with the discovery burst transmission window being in use; and wherein a second subset of the at least one control resource set type zero physical downlink control channel configuration index is associated with the discovery burst transmission window not being in use. 38. The method of any one of claims 25 to 37, wherein the configuration comprises: a half-frame indication being omitted for operation for at least one frequency band, wherein at least one location of the at least one synchronization signal and physical broadcast channel block is assumed to be within a predetermined half frame; and an adapted half-frame bit in a physical broadcast channel payload that indicates whether or not the discovery burst transmission window is used for the cell. 39. The method of claim 38, wherein the at least one frequency band is an unlicensed band or a licensed band. 40. The method of any one of claims 25 to 39, wherein the configuration comprises: a common sub-carrier spacing indication being omitted for a frequency band operation, wherein sub-carrier spacing of common signals is assumed to be determined based on at least one sub-carrier spacing of the at least one synchronization signal and physical broadcast channel block; and an adapted common sub-carrier spacing indication bit in a physical broadcast channel payload that indicates whether or not the discovery burst transmission window is used for the cell. 41. The method of any one of claims 25 to 40, wherein the configuration comprises: at least one physical cell identifier being adapted to indicate whether or not the discovery burst transmission window is used; wherein a subset of the at least one physical cell identifier is assigned for use of the discovery burst transmission window. 42. The method of any one of claims 25 to 41, wherein the configuration comprises: at least one primary synchronization signal or at least one secondary synchronization signal being adjusted to indicate whether or not the discovery burst transmission window is used; wherein a sequence generation of the at least one primary synchronization signal in the at least one synchronization signal and physical broadcast channel block is adapted to account for discovery burst transmission window use indication; or a sequence generation of the at least one secondary synchronization signal in the at least one synchronization signal and physical broadcast channel block is adapted to account for discovery burst transmission window use indication. 43. The method of claim 42, wherein the configuration comprises adjusting a cyclic shift of either the sequence generation of the at least one primary synchronization signal or the sequence generation of the at least one secondary synchronization signal. 44. The method of any one of claims 25 to 43, implemented in a physical layer of the communication network. 45. The method of any one of claims 25 to 44, wherein information related to whether or not the discovery burst transmission window is used for the cell is used to adjust a search and monitoring of the synchronization signal and physical broadcast channel block. 46. The method of claim 45, wherein the search and monitoring of the synchronization signal and physical broadcast channel block comprises at least one of: a number of synchronization signal and physical broadcast channel block positions; a location of synchronization signal and physical broadcast channel block time locations; or a time window duration of a possible synchronization signal and physical broadcast channel block transmission. 47. The method of any one of claims 45 to 46, wherein the information of whether or not the discovery burst transmission window is used for the cell is used to determine how to interpret a synchronization signal and physical broadcast channel block content/information payload. 48. The method of any one of claims 27 to 47, wherein the unlicensed band is a band restricted/intended for operation with shared spectrum channel access. 49. An apparatus comprising: at least one processor; and at least one non-transitory memory including computer program code; wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to: detect at least one synchronization signal and physical broadcast channel block during searching for a synchronization signal associated with a cell in a communication network; determine a configuration related to whether or not a discovery burst transmission window is used for the cell; determine, based on the configuration, whether or not the discovery burst transmission window is used for the cell; and determine at least one assumption to use when monitoring and detecting the synchronization signal and physical broadcast channel block, based on whether or not the discovery burst transmission window is used for the cell. 50. An apparatus comprising: at least one processor; and at least one non-transitory memory including computer program code; wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to: provide at least one synchronization signal and physical broadcast channel block or signaling used to search for a synchronization signal associated with a cell in a communication network; provide a configuration related to whether or not a discovery burst transmission window is used for the cell; wherein the configuration is used in a determination of whether or not the discovery burst transmission window is used for the cell; and wherein the configuration is used in a determination of at least one assumption to use for a monitoring and a detection of the synchronization signal and physical broadcast channel block. 51. An apparatus comprising: means for detecting at least one synchronization signal and physical broadcast channel block during searching for a synchronization signal associated with a cell in a communication network; means for determining a configuration related to whether or not a discovery burst transmission window is used for the cell; means for determining, based on the configuration, whether or not the discovery burst transmission window is used for the cell; and means for determining at least one assumption to use when monitoring and detecting the synchronization signal and physical broadcast channel block, based on whether or not the discovery burst transmission window is used for the cell. 52. An apparatus comprising: means for providing at least one synchronization signal and physical broadcast channel block or signaling used to search for a synchronization signal associated with a cell in a communication network; means for providing a configuration related to whether or not a discovery burst transmission window is used for the cell; wherein the configuration is used in a determination of whether or not the discovery burst transmission window is used for the cell; and wherein the configuration is used in a determination of at least one assumption to use for a monitoring and a detection of the synchronization signal and physical broadcast channel block. 53. A non-transitory program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine for performing operations, the operations comprising: detecting at least one synchronization signal and physical broadcast channel block during searching for a synchronization signal associated with a cell in a communication network; determining a configuration related to whether or not a discovery burst transmission window is used for the cell; determining, based on the configuration, whether or not the discovery burst transmission window is used for the cell; and determining at least one assumption to use when monitoring and detecting the synchronization signal and physical broadcast channel block, based on whether or not the discovery burst transmission window is used for the cell. 54. A non-transitory program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine for performing operations, the operations comprising: providing at least one synchronization signal and physical broadcast channel block or signaling used to search for a synchronization signal associated with a cell in a communication network; providing a configuration related to whether or not a discovery burst transmission window is used for the cell; wherein the configuration is used in a determination of whether or not the discovery burst transmission window is used for the cell; and wherein the configuration is used in a determination of at least one assumption to use for a monitoring and a detection of the synchronization signal and physical broadcast channel block. |
NOTE 1: SS Block pattern is defined in clause 4.1 in TS 38.213 [8]. NOTE 2: The applicable SS raster entries are GSCN = {6432, 6443, 6457, 6468, 6479, 6493, 6507, 6518, 6532, 6543}. NOTE 3: The following GSCN are allowed for operation in band n46: GSCN = 8996, 9010, 9024, 9038, 9051, 9065, 9079, 9093, 9107, 9121, 9218, 9232, 9246, 9260, 9274, 9288, 9301, 9315, 9329, 9343, 9357, 9371, 9385, 9402, 9416, 9430, 9444, 9458, 9472, 9485, 9499, 9513. NOTE 4: The following GSCN are allowed for operation in band n96: GSCN = 9548, 9562, 9576, 9590, 9603, 9617,9631, 9645, 9659, 9673, 9687, 9701, 9714, 9728, 9742, 9756, 9770, 9784, 9798, 9812, 9826, 9840, 9853, 9867, 9881, 9895, 9909, 9923, 9937, 9951, 9964, 9978, 9992, 10006, 10020, 10034, 10048, 10062, 10076, 10090, 10103, 10117, 10131, 10145, 10159, 10173, 10187, 10201, 10214, 10228, 10242, 10256, 10270, 10284, 10298, 10312, 10325, 10339, 10353. NOTE 5: The applicable SS raster entries are GSCN = {5032, 5043, 5054} NOTE 6: The applicable SS raster entries are GSCN = {4707, 4715, 4718, 4729, 4732, 4743, 4747, 4754, 4761, 4768, 4772, 4782, 4786, 4793} [0047] The interpretation of MIB content is dependent on the kSSB value as described in Section 54 of 38.213: Upon detection of a SS/PBCH block, the UE determines from MIB that a CORESET for Type0-PDCCH CSS set, as described in Clause 13, is present if k SSB < 24 [4, TS 38.211] for FR1 or if k SSB < 12 for FR2. The UE determines from MIB that a CORESET for Type0- PDCCH CSS set is not present if k SSB > 23 for FR1 or if k SSB > 11 for FR2; the CORESET for Type0-PDCCH CSS set may be provided by PDCCH-ConfigCommon. [0048] When the k SSB < 12 (for FR1) and <24 (for FR2), it is defined by 38.211 Section 7.4.3.1 as a sub-carrier offset to common resource block scs 0: The quantity k SSB is the subcarrier offset from subcarrier 0 in common resource block to subcarrier 0 of the SS/PBCH block, where is obtained from the higher-layer parameter offsetToPointA and the 4 least significant bits of k SSB are given by the higher-layer parameter ssb-SubcarrierOffset and for SS/PBCH block type A the most significant bit of k SSB is given by in the PBCH payload as defined in clause 7.1.1 of [4, TS 38.212]. For operation with shared spectrum channel access, the 4 least significant bits of are given by the higher-layer parameter ssb-SubcarrierOffset and the most significant bit of is given by in the PBCH payload as defined in clause 7.1.1 of [4, TS 38.212]. If If ssb-SubcarrierOffset is not provided,k SSB is derived from the frequency difference between the SS/PBCH block and Point A. [0049] When the k SSB >11 for FR1 or >23 for FR2, the k SSB value is interpreted as described in Table 13-16 and 13-17, i.e. as an index of the GSCN where, or range where the UE may find the SSB with CORESET#0 configuration or may not find the SSB with CORESET#0 configuration, respectively. [0050] In one embodiment, synch raster positions in frequency are allocated separately for the case DBTW is used and for the case the DBTW is not used for the SSBs. The UE determines based on the synch raster position where it detected the SSB whether or not DBTW is used in the cell. The synchronization signal and physical broadcast channel (SSB) blocks may carry a configuration for a control resource set 0 (CORESET#0). [0051] In another embodiment, certain SSB to CORESET#0 starting PRB offsets are associated to the case where DBTW is enabled, and certain offsets (e.g. certain SSB to CORESET#0 starting PRB offsets) are associated to the case where DBTW is not used for the SSBs. The UE determines based on the read offset in the PBCH of the detected SSB whether or not DBTW is used. [0052] In an alternative embodiment, k_SSB offset values in PBCH are determined so that a certain subset of k_SSB values are used to indicate the need to apply DBTW. [0053] In one further embodiment, a CORESET#0 (CORESET for Type0-PDCCH) configuration index signaled in the PBCH is associated either to a DBTW in use or to a DBTW not in use. The UE would then then determine from the configuration index whether or not DBTW is applied in the detected cell. [0054] In one additional embodiment, the half-frame indication is omitted for a certain frequency band operation and the locations of the SSBs are always assumed to fall within the first half-frame. Then the half-frame bit in the PBCH payload is adapted to indicate whether DBTW is used or not. [0055] In one additional embodiment, the sub-carrier spacing of the broadcast system information, such as SIB1 and paging, is assumed fixed so that sub-carrier spacing of the SSB determines the sub-carrier spacing of the sub-carrier spacing of the broadcast system information and the common sub-carrier indication is omitted from the MIB for NR operation in the 52.6 GHz to 71 GHz range. Then the common sub-carrier spacing indication bit in the PBCH payload is adapted to indicate whether DBTW is used or not. [0056] In one additional embodiment, the physical cell ID is adapted to indicate whether DBTW is used or not, so that a certain sub-set of physical cell IDs is assigned to the case when DBTW is used or not. [0057] In one additional embodiment, the PSS and/or SSS sequences are adjusted to indicate whether DBTW is used or not, so that for example SSS sequence generation is adapted to account for DBTW use indication. [0058] In one possible implementation of the first proposed embodiment, the UE is provided for the unlicensed band two synchronization rasters, where one set of synchronization raster locations is used when DBTW is used/applied, and another set of locations is used when no DBTW is used/applied, for example as shown in Table 1 below. [0059] As used herein, references to an unlicensed band may refer to a band restricted/intended for operation with shared spectrum channel access (as defined by TS 37.213). Table 1: Applicable SS raster entries per operating band NOTE 1: SS Block pattern is defined in clause 4.1 in TS 38.213 [10]. NOTE 2: <Step size> is determined based on whether DBTW is applied or not. [0060] In one alternative implementation of the first proposed embodiment, the used SS raster entries could be the same for both cases, but the mapping between the SSB resource element index and GSCN location is changed. For example in one case the GSCN location is in the middle of the SSB (e.g. when DBTW is applied) and in the other case the GSCN location is in the edge of the SSB (e.g. when DBTW is not applied). For example, this could be captured in the specification as follows. [0061] The mapping between the synchronization raster and the corresponding resource element of the SS block is given in Table 2. Table 2: Synchronization raster to SS block resource element mapping k is the subcarrier number of the SS/PBCH block defined in TS 38.211 clause 7.4.3.1 [9]. [0062] This effectively creates a shift between the SSB locations. [0063] In one possible implementation of the third alternative embodiment, for operation at above 52.6 GHz and especially on the 60 GHz unlicensed band(s), the k SSB determines Upon detection of a SS/PBCH block, the UE determines from MIB that a CORESET for Type0-PDCCH CSS set, as described in Clause 13, is present if k SSB < 24 [4, TS 38.211] for FR1 or if k SSB < 12 for FR2. The UE determines from MIB that a CORESET for Type0- PDCCH CSS set is not present if k SSB > 23 for FR1 or if k SSB > 11 for FR2; the CORESET for Type0-PDCCH CSS set may be provided by PDCCH-ConfigCommon. For operation at shared spectrum access, for 60GHz band operation, the UE determines that DBTW is not applied when k SSB > 14. [0064] In one possible implementation of the fourth embodiment, for selected SSB to CORESET#0 configurations, the UE needs to assume DBTW (e.g. indexes 8…15), while for other configurations DBTW is not assumed (indexes 0 …7), as illustrated in Table 3 below: Table 3: Set of resource blocks and slot symbols of CORESET for Type0-PDCCH search space set when {SS/PBCH block, PDCCH} SCS is {120, 120} kHz [0065] In one possible implementation of the embodiment related to adjusting the PSS and/or SSS sequences, in SSS sequence generation the definition of the cyclic shifts is adjusted as follows: where [0066] In one alternative implementation of the above embodiments, the method is used to indicate additionally or alternatively whether the UE needs to assume that LBT is used for UE RACH transmission or other transmissions. [0067] In one alternative implementation of the above embodiments, a UE may, based on information whether DBTW is used in the cell or not, use different assumption for the number of possible SSB locations, SSB time locations or time window duration which SSBs may be transmitted in the cell. [0068] In one alternative implementation of the above embodiments, a UE may, based on information whether DBTW is used in the cell or not, determine how to interpret the information payload bits for example in PBCHs. [0069] FIG. 3 is an example apparatus 300, which may be implemented in hardware, configured to implement the examples described herein. The apparatus 300 comprises a processor 302, at least one non-transitory or transitory memory 304 including computer program code 305, wherein the at least one memory 304 and the computer program code 305 are configured to, with the at least one processor 302, cause the apparatus 300 to implement circuitry, a process, component, module, or function (collectively configuration/determining 306) to implement facilitating adaptive discovery burst time window configuration. The configuration 306 and determining 306 includes circuitry configured to provide a configuration for enabling DBTW 320 for an SSB or to determine whether DBTW is enabled 320 for an SSB, or to provide a configuration for not enabling DBTW 322 or to determine whether DBTW is not enabled 322 for an SSB. Items 320 and 322 may be implemented within the same circuit (e.g. as one block). [0070] The apparatus 300 optionally includes a display and/or I/O interface 308 that may be used to display aspects or a status of the methods described herein (e.g., as one of the methods is being performed or at a subsequent time). The apparatus 300 includes one or more network (N/W) interfaces (I/F(s)) 310. The N/W I/F(s) 310 may be wired and/or wireless and communicate over the Internet/other network(s) via any communication technique. The N/W I/F(s) 310 may comprise one or more transmitters and one or more receivers. The N/W I/F(s) 30 may comprise standard well-known components such as an amplifier, filter, frequency-converter, (de)modulator, and encoder/decoder circuitries and one or more antennas. [0071] The apparatus 300 may be UE 110, RAN node 170 or network element(s) 190 (e.g. to implement the functionality of the configuration 306). Thus, processor 302 may correspond respectively to processor(s) 120, processor(s) 152 or processor(s) 175, memory 304 may correspond respectively to memory(ies) 125, memory(ies) 155 or memory(ies) 171, computer program code 305 may correspond respectively to computer computer program code 123, module 140-1, module 140-2, or computer program code 153, module 150-1, module 150-2, or computer program code 173, and N/W I/F(s) 410 may correspond respectively to N/W I/F(s) 161 or N/W I/F(s) 180. Alternatively, apparatus 300 may not correspond to either of UE 110, RAN node 170 or network element(s) 190, as apparatus 300 may be part of a self-organizing/optimizing network (SON) node, such as in a cloud. The apparatus 300 may also be distributed throughout the network 300 including within and between apparatus 300 and any one of the network element(s) (190) (such as a network control element (NCE)) and/or the RAN node 170 and/or the UE 110. [0072] Interface 312 enables data communication between the various items of apparatus 300, as shown in FIG. 3. Interface 312 may be one or more buses, or interface 312 may be one or more software interfaces configured to pass data between the items of apparatus 300. For example, the interface 312 may be one or more buses such as address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, and the like. The apparatus 300 need not comprise each of the features mentioned, or may comprise other features as well. [0073] FIG. 4 is an example method 400 to implement facilitating adaptive discovery burst time window configuration, based on the example embodiments described herein. At 402, the method includes detecting at least one synchronization signal and physical broadcast channel block during searching for a synchronization signal associated with a cell in a communication network. At 404, the method includes determining a configuration related to whether or not a discovery burst transmission window is used for the cell. At 406, the method includes determining, based on the configuration, whether or not the discovery burst transmission window is used for the cell. At 408, the method includes determining at least one assumption to use when monitoring and detecting the synchronization signal and physical broadcast channel block, based on whether or not the discovery burst transmission window is used for the cell. Method 400 may be performed by apparatus 300, UE 110, or a combination of those. [0074] FIG. 5 is an example method 500 to implement facilitating adaptive discovery burst time window configuration, based on the example embodiments described herein. At 502, the method includes providing at least one synchronization signal and physical broadcast channel block or signaling used to search for a synchronization signal associated with a cell in a communication network. At 504, the method includes providing a configuration related to whether or not a discovery burst transmission window is used for the cell. At 506, the method includes wherein the configuration is used in a determination of whether or not the discovery burst transmission window is used for the cell. At 508, the method includes wherein the configuration is used in a determination of at least one assumption to use for a monitoring and a detection of the synchronization signal and physical broadcast channel block. Method 500 may be performed by apparatus 300, radio node 170, network element(s) 190, within the physical layer of communication network 100 of FIG. 1, or a combination of those. [0075] References to a ‘computer’, ‘processor’, etc. should be understood to encompass not only computers having different architectures such as single/multi-processor architectures and sequential or parallel architectures but also specialized circuits such as field-programmable gate arrays (FPGAs), application specific circuits (ASICs), signal processing devices and other processing circuitry. References to computer program, instructions, code etc. should be understood to encompass software for a programmable processor or firmware such as, for example, the programmable content of a hardware device whether instructions for a processor, or configuration settings for a fixed-function device, gate array or programmable logic device etc. [0076] The memory(ies) as described herein may be implemented using any suitable data storage technology, such as semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, non-transitory memory, transitory memory, fixed memory and removable memory. The memory(ies) may comprise a database for storing data. [0077] As used herein, the term ‘circuitry’ may refer to the following: (a) hardware circuit implementations, such as implementations in analog and/or digital circuitry, and (b) combinations of circuits and software (and/or firmware), such as (as applicable): (i) a combination of processor(s) or (ii) portions of processor(s)/software including digital signal processor(s), software, and memory(ies) that work together to cause an apparatus to perform various functions, and (c) circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present. As a further example, as used herein, the term ‘circuitry’ would also cover an implementation of merely a processor (or multiple processors) or a portion of a processor and its (or their) accompanying software and/or firmware. The term ‘circuitry’ would also cover, for example and if applicable to the particular element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in a server, a cellular network device, or another network device. [0078] An example method includes detecting at least one synchronization signal and physical broadcast channel block during searching for a synchronization signal associated with a cell in a communication network; determining a configuration related to whether or not a discovery burst transmission window is used for the cell; determining, based on the configuration, whether or not the discovery burst transmission window is used for the cell; and determining at least one assumption to use when monitoring and detecting the synchronization signal and physical broadcast channel block, based on whether or not the discovery burst transmission window is used for the cell. [0079] The method may further include wherein the configuration comprises at least one synchronization raster position of at least one synchronization raster being allocated separately in frequency when the discovery burst transmission window is used for the cell and when the discovery burst transmission window is not used for the cell; determining, based on the at least one synchronization raster position within the at least one synchronization signal and physical broadcast channel block, whether or not the discovery burst transmission window is used for the cell. [0080] The method may further include wherein the configuration comprises being provided for an unlicensed band or a licensed band to the at least one synchronization raster; wherein a first set of the at least one synchronization raster position is used when the discovery burst transmission window is used for the cell; and wherein a second set of the at least one synchronization raster position is used when the discovery burst transmission window is not used for the cell. [0081] The method may further include wherein the at least one synchronization raster position is identified with a global synchronization channel number. [0082] The method may further include wherein the configuration comprises a mapping between at least one resource element index of the at least one synchronization signal and physical broadcast channel block and a respective at least one global synchronization channel number location; wherein a first one of the at least one global synchronization channel number location is associated with the discovery burst transmission window being used for the cell; and wherein a second one of the at least one global synchronization channel number location is associated with the discovery burst transmission window not being used for the cell. [0083] The method may further include wherein the first one of the at least one global synchronization channel number location is in a middle of the at least one synchronization signal and physical broadcast channel block; and wherein the second one of the at least one global synchronization channel number location is in an edge of the at least one synchronization signal and physical broadcast channel block. [0084] The method may further include wherein the at least one resource element index is a subcarrier number of a synchronization signal and physical broadcast channel block. [0085] The method may further include wherein the configuration comprises at least one synchronization signal and physical broadcast channel block to control resource set number zero starting physical resource block offset being associated to the case that the discovery burst transmission window is enabled; wherein the configuration comprises the at least one synchronization signal and physical broadcast channel block to control resource set number zero starting physical resource block offset being associated to the case that the discovery burst transmission window is not used for the at least one synchronization signal and physical broadcast channel block; and the method further comprising determining whether or not the discovery burst transmission window is used for the cell following detection of the at least one synchronization signal and physical broadcast channel block. [0086] The method may further include wherein determining the configuration comprises determining at least one synchronization signal and physical broadcast channel block offset value in a physical broadcast channel, wherein a subset of the at least one synchronization signal and physical broadcast channel block offset value is used to indicate that the discovery burst transmission window is used for the cell. [0087] The method may further include wherein determining the configuration further comprises determining, for operation at shared spectrum access, for band operation at a given frequency, that the discovery burst transmission window is not used for the cell when the at least one synchronization signal and physical broadcast channel block offset value is greater than an amount relative to a subcarrier zero in a common resource block. [0088] The method may further include wherein a subset of the at least one synchronization signal and physical broadcast channel block offset value is used to indicate that the discovery burst transmission window is not used for the cell. [0089] The method may further include wherein the configuration comprises at least one control resource set type zero physical downlink control channel configuration index in a physical broadcast channel associated either to the discovery burst transmission window being in use or not being in use; wherein the determining of whether or not the discovery burst transmission window is used for the cell is based on the configuration index. [0090] The method may further include wherein a first subset of the at least one control resource set type zero physical downlink control channel configuration index is associated with the discovery burst transmission window being in use; and wherein a second subset of the at least one control resource set type zero physical downlink control channel configuration index is associated with the discovery burst transmission window not being in use. [0091] The method may further include wherein the configuration comprises: a half-frame indication being omitted for operation for at least one frequency band, wherein at least one location of the at least one synchronization signal and physical broadcast channel block is assumed to be within a predetermined half frame; and an adapted half-frame bit in a physical broadcast channel payload that indicates whether or not the discovery burst transmission window is used for the cell. [0092] The method may further include wherein the at least one frequency band is an unlicensed band or a licensed band. [0093] The method may further include wherein the configuration comprises: a common sub-carrier spacing indication being omitted for a frequency band operation, wherein sub-carrier spacing of common signals is assumed to be determined based on at least one sub-carrier spacing of the at least one synchronization signal and physical broadcast channel block; and an adapted common sub-carrier spacing indication bit in a physical broadcast channel payload that indicates whether or not the discovery burst transmission window is used for the cell. [0094] The method may further include wherein the configuration comprises: at least one physical cell identifier being adapted to indicate whether or not the discovery burst transmission window is used; wherein a subset of the at least one physical cell identifier is assigned for the discovery burst transmission window being used or the discovery burst transmission window not being used. [0095] The method may further include wherein the configuration comprises: at least one primary synchronization signal or at least one secondary synchronization signal being adjusted to indicate whether or not the discovery burst transmission window is used; wherein a sequence generation of the at least one primary synchronization signal in the at least one synchronization signal and physical broadcast channel block is adapted to account for discovery burst transmission window use indication; or a sequence generation of the at least one secondary synchronization signal in the at least one synchronization signal and physical broadcast channel block is adapted to account for discovery burst transmission window use indication. [0096] The method may further include wherein the configuration comprises adjusting a cyclic shift of either the sequence generation of the at least one primary synchronization signal or the sequence generation of the at least one secondary synchronization signal. [0097] The method may be performed by a user equipment. [0098] The method may further include wherein a user equipment uses information related to whether or not the discovery burst transmission window is used for the cell, to adjust a search and monitoring of the synchronization signal and physical broadcast channel block. [0099] The method may further include wherein the search and monitoring of the synchronization signal and physical broadcast channel block comprises at least one of: a number of synchronization signal and physical broadcast channel block positions; a location of synchronization signal and physical broadcast channel block time locations; or a time window duration of a possible synchronization signal and physical broadcast channel block transmission. [00100] The method may further include wherein a user equipment uses the information of whether or not the discovery burst transmission window is used for the cell, to determine how to interpret a synchronization signal and physical broadcast channel block content/information payload. [00101] The method may further include wherein the unlicensed band is a band restricted/intended for operation with shared spectrum channel access. [00102] An example method includes providing at least one synchronization signal and physical broadcast channel block or signaling used to search for a synchronization signal associated with a cell in a communication network; providing a configuration related to whether or not a discovery burst transmission window is used for the cell; wherein the configuration is used in a determination of whether or not the discovery burst transmission window is used for the cell; and wherein the configuration is used in a determination of at least one assumption to use for a monitoring and a detection of the synchronization signal and physical broadcast channel block. [00103] The method may further include wherein the configuration comprises at least one synchronization raster position of at least one synchronization raster being allocated separately in frequency when the discovery burst transmission window is used for the cell and when the discovery burst transmission window is not used for the cell. [00104] The method may further include wherein the configuration comprises providing a user equipment for an unlicensed band or a licensed band to the at least one synchronization raster; wherein a first set of the at least one synchronization raster position is used when the discovery burst transmission window is used for the cell; and wherein a second set of the at least one synchronization raster position is used when the discovery burst transmission window is not used for the cell. [00105] The method may further include wherein the at least one synchronization raster position is identified with a global synchronization channel number. [00106] The method may further include wherein the configuration comprises a mapping between the at least one resource element index of the at least one synchronization signal and physical broadcast channel block and a respective at least one global synchronization channel number location; wherein a first one of the at least one global synchronization channel number location is associated with the discovery burst transmission window being used for the cell; and wherein a second one of the at least one global synchronization channel number location is associated with the discovery burst transmission window not being used for the cell. [00107] The method may further include wherein the first one of the at least one global synchronization channel number location is in a middle of the at least one synchronization signal and physical broadcast channel block; and wherein the second one of the at least one global synchronization channel number location is in an edge of the at least one synchronization signal and physical broadcast channel block. [00108] The method may further include wherein the at least one resource element index is a subcarrier number of a synchronization signal and physical broadcast channel block. [00109] The method may further include wherein the configuration comprises at least one synchronization signal and physical broadcast channel block to control resource set number zero starting physical resource block offset being associated to the case that the discovery burst transmission window is enabled; and wherein the configuration comprises the at least one synchronization signal and physical broadcast channel block to control resource set number zero starting physical resource block offset being associated to the case that the discovery burst transmission window is not used for the at least one synchronization signal and physical broadcast channel block. [00110] The method may further include wherein the configuration comprises at least one synchronization signal and physical broadcast channel block offset value in the physical broadcast channel, wherein a subset of the at least one synchronization signal and physical broadcast channel block offset value is used to indicate that the discovery burst transmission window is used for the cell. [00111] The method may further include wherein the configuration further comprises, for operation at shared spectrum access, for band operation at a given frequency, that the discovery burst transmission window is not used for the cell when the at least one synchronization signal and physical broadcast channel block offset value is greater than an amount relative to a subcarrier zero in a common resource block. [00112] The method may further include wherein a subset of the at least one synchronization signal and physical broadcast channel offset value is used to indicate that the discovery burst transmission window is not used for the cell. [00113] The method may further include wherein the configuration comprises at least one control resource set type zero physical downlink control channel configuration index in a physical broadcast channel associated either to the discovery burst transmission window being in use or not being in use. [00114] The method may further include wherein a first subset of the at least one control resource set type zero physical downlink control channel configuration index is associated with the discovery burst transmission window being in use; and wherein a second subset of the at least one control resource set type zero physical downlink control channel configuration index is associated with the discovery burst transmission window not being in use. [00115] The method may further include wherein the configuration comprises: a half-frame indication being omitted for operation for at least one frequency band, wherein at least one location of the at least one synchronization signal and physical broadcast channel block is assumed to be within a predetermined half frame; and an adapted half-frame bit in a physical broadcast channel payload that indicates whether or not the discovery burst transmission window is used for the cell. [00116] The method may further include wherein the at least one frequency band is an unlicensed band or a licensed band. [00117] The method may further include wherein the configuration comprises: a common sub-carrier spacing indication being omitted for a frequency band operation, wherein sub-carrier spacing of common signals is assumed to be determined based on at least one sub-carrier spacing of the at least one synchronization signal and physical broadcast channel block; and an adapted common sub-carrier spacing indication bit in a physical broadcast channel payload that indicates whether or not the discovery burst transmission window is used for the cell. [00118] The method may further include wherein the configuration comprises: at least one physical cell identifier being adapted to indicate whether or not the discovery burst transmission window is used; wherein a subset of the at least one physical cell identifier is assigned for use of the discovery burst transmission window. [00119] The method may further include wherein the configuration comprises: at least one primary synchronization signal or at least one secondary synchronization signal being adjusted to indicate whether or not the discovery burst transmission window is used; wherein a sequence generation of the at least one primary synchronization signal in the at least one synchronization signal and physical broadcast channel block is adapted to account for discovery burst transmission window use indication; or a sequence generation of the at least one secondary synchronization signal in the at least one synchronization signal and physical broadcast channel block is adapted to account for discovery burst transmission window use indication. [00120] The method may further include wherein the configuration comprises adjusting a cyclic shift of either the sequence generation of the at least one primary synchronization signal or the sequence generation of the at least one secondary synchronization signal. [00121] The method may further include may be implemented in a physical layer of the communication network. [00122] The method may further include wherein information related to whether or not the discovery burst transmission window is used for the cell is used to adjust a search and monitoring of the synchronization signal and physical broadcast channel block. [00123] The method may further include wherein the search and monitoring of the synchronization signal and physical broadcast channel block comprises at least one of: a number of synchronization signal and physical broadcast channel block positions; a location of synchronization signal and physical broadcast channel block time locations; or a time window duration of a possible synchronization signal and physical broadcast channel block transmission. [00124] The method may further include wherein the information of whether or not the discovery burst transmission window is used for the cell is used to determine how to interpret a synchronization signal and physical broadcast channel block content/information payload. [00125] The method may further include wherein the unlicensed band is a band restricted/intended for operation with shared spectrum channel access. [00126] An example apparatus includes at least one processor; and at least one non-transitory memory including computer program code; wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to: detect at least one synchronization signal and physical broadcast channel block during searching for a synchronization signal associated with a cell in a communication network; determine a configuration related to whether or not a discovery burst transmission window is used for the cell; determine, based on the configuration, whether or not the discovery burst transmission window is used for the cell; and determine at least one assumption to use when monitoring and detecting the synchronization signal and physical broadcast channel block, based on whether or not the discovery burst transmission window is used for the cell. [00127] An example apparatus includes at least one processor; and at least one non-transitory memory including computer program code; wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to: provide at least one synchronization signal and physical broadcast channel block or signaling used to search for a synchronization signal associated with a cell in a communication network; provide a configuration related to whether or not a discovery burst transmission window is used for the cell; wherein the configuration is used in a determination of whether or not the discovery burst transmission window is used for the cell; and wherein the configuration is used in a determination of at least one assumption to use for a monitoring and a detection of the synchronization signal and physical broadcast channel block. [00128] An example apparatus includes means for detecting at least one synchronization signal and physical broadcast channel block during searching for a synchronization signal associated with a cell in a communication network; means for determining a configuration related to whether or not a discovery burst transmission window is used for the cell; means for determining, based on the configuration, whether or not the discovery burst transmission window is used for the cell; and means for determining at least one assumption to use when monitoring and detecting the synchronization signal and physical broadcast channel block, based on whether or not the discovery burst transmission window is used for the cell. [00129] An example apparatus includes means for providing at least one synchronization signal and physical broadcast channel block or signaling used to search for a synchronization signal associated with a cell in a communication network; means for providing a configuration related to whether or not a discovery burst transmission window is used for the cell; wherein the configuration is used in a determination of whether or not the discovery burst transmission window is used for the cell; and wherein the configuration is used in a determination of at least one assumption to use for a monitoring and a detection of the synchronization signal and physical broadcast channel block. [00130] An example non-transitory program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine for performing operations is provided, the operations comprising: detecting at least one synchronization signal and physical broadcast channel block during searching for a synchronization signal associated with a cell in a communication network; determining a configuration related to whether or not a discovery burst transmission window is used for the cell; determining, based on the configuration, whether or not the discovery burst transmission window is used for the cell; and determining at least one assumption to use when monitoring and detecting the synchronization signal and physical broadcast channel block, based on whether or not the discovery burst transmission window is used for the cell. [00131] An example non-transitory program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine for performing operations is provided, the operations comprising: providing at least one synchronization signal and physical broadcast channel block or signaling used to search for a synchronization signal associated with a cell in a communication network; providing a configuration related to whether or not a discovery burst transmission window is used for the cell; wherein the configuration is used in a determination of whether or not the discovery burst transmission window is used for the cell; and wherein the configuration is used in a determination of at least one assumption to use for a monitoring and a detection of the synchronization signal and physical broadcast channel block. [00132] It should be understood that the foregoing description is only illustrative. Various alternatives and modifications may be devised by those skilled in the art. For example, features recited in the various dependent claims could be combined with each other in any suitable combination(s). In addition, features from different embodiments described above could be selectively combined into a new embodiment. Accordingly, this description is intended to embrace all such alternatives, modifications and variances which fall within the scope of the appended claims. [00133] The following acronyms and abbreviations that may be found in the specification and/or the drawing figures are defined as follows: 3GPP third generation partnership project 4G fourth generation 5G fifth generation 5GC 5G core network 802.11x part of the IEEE 802 set of local area network (LAN) technical standards AMF access and mobility management function ASIC application-specific integrated circuit BM beam management BPSK binary phase shift keying BWP bandwidth part Cat. category CCA clear channel assessment CCE control channel element CORESET control resource set CRB common resource block CSI channel state information CSS common search space CU central unit or centralized unit DB discovery burst DBTW discovery burst transmission window DCI downlink control information DL downlink DMRS or DM-RS demodulation reference signal DSP digital signal processor DU distributed unit ED energy detection eNB evolved Node B (e.g., an LTE base station) EN-DC E-UTRA-NR dual connectivity en-gNB node providing NR user plane and control plane protocol terminations towards the UE, and acting as a secondary node in EN-DC E-UTRA evolved universal terrestrial radio access, i.e., the LTE radio access technology F1 control interface between the CU and the DU FFS for further study FFT fast fourier transform FPGA field-programmable gate array FR frequency range FR# frequency range # gNB base station for 5G/NR, i.e., a node providing NR user plane and control plane protocol terminations towards the UE, and connected via the NG interface to the 5GC GSCN global synchronization channel number HARQ hybrid automatic repeat request ID identifier IEEE Institute of Electrical and Electronics Engineers I/F interface I/O input/output ITS intelligent transport/transportation systems/service LBT listen before talk Lmax maximum number of candidate SSBs LMF location management function LS liaison statement LSB least significant bit(s) LTE long term evolution (4G) MAC medium access control MIB master information block MME mobility management entity MSB most significant bit(s) M-sequence maximum-length sequence(s) n# bands in NR defined with prefix of "n" NCE network control element NCP normal cyclic prefix ng or NG new generation ng-eNB new generation eNB NG-RAN new generation radio access network NR new radio (5G) NR-U 5G NR in unlicensed spectrum N/W network PBCH physical broadcast channel PCID physical cell ID PDA personal digital assistant PDCCH physical downlink control channel PDCP packet data convergence protocol PDSCH physical downlink shared channel PHY physical layer PRACH physical random access channel PRB physical resource block PSD power spectral density PSS primary synchronization signal PTRS phase tracking reference signal PUCCH physical uplink control channel PUSCH physical uplink shared channel Q number of beams QCL quasi co-location R# RAN meeting or release RACH random access channel RAN radio access network RAN# RAN meeting RAN1 radio layer 1 or RAN WG1 RAN3 radio layer 3 or RAN WG3 RAN4 radio layer 4 or RAN WG4 RB resource block Rel or Rel- release RMSI remaining minimum system information RF radio frequency RLC radio link control RLM radio link monitoring RO RACH occasion RP 3GPP RAN RRC radio resource control (protocol) RRH remote radio head RRM radio resource management RU radio unit Rx receiver or reception SCS or scs subcarrier spacing seq sequence SGW serving gateway SI study item SIB1 system information block #1 SON self-organizing/optimizing network SRS sounding reference signal SS synchronization signal SSB synchronization signal and PBCH block SSS secondary synchronization signal symb symbol TR technical report TRP transmission and reception point TS technical specification Tx transmitter or transmission UE user equipment (e.g., a wireless, typically mobile device) UL uplink UPF user plane function WG working group WI work item WID work item description X2 network interface between RAN nodes and between RAN and the core network Xn network interface between NG-RAN nodes