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Title:
INTER-RAT (RADIO ACCESS TECHNOLOGY) RE-ESTABLISHMENT ENHANCEMENTS IN MULTI-RAT DUAL CONNECTIVITY (MR-DC)
Document Type and Number:
WIPO Patent Application WO/2020/076230
Kind Code:
A3
Abstract:
Embodiments include methods for a target node to establish a connection with a user equipment (UE) operating in dual connectivity (DC) with a PCell utilizing a first radio access technology (RAT) and with a PSCell utilizing a second RAT. Embodiments include receiving, from the UE, a re-establishment request message comprising parameters associated with the PSCell, a first message authentication code (MAC), and an indication of the UE's selection of a target cell served by the target node as a replacement for the PCell. The targetcell utilizes the second RAT. Embodiments include verifying the message integrity based on the first MAC, and determining a full UE context based on the plurality of parameters associated with the PSCell and on a successful verification of the message integrity. Embodiments include establishing a connection with the UE based on the full UE context, whereby the target cell serves as a PCell for DC.

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Inventors:
TEYEB OUMER (SE)
RUGELAND PATRIK (SE)
DA SILVA ICARO L J (SE)
Application Number:
PCT/SE2019/050986
Publication Date:
May 28, 2020
Filing Date:
October 08, 2019
Export Citation:
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Assignee:
ERICSSON TELEFON AB L M (SE)
International Classes:
H04W36/00; H04W36/14
Domestic Patent References:
WO2018029621A12018-02-15
WO2016045625A22016-03-31
Foreign References:
EP2645804A12013-10-02
Other References:
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Radio Resource Control (RRC) protocol specification (Release 15)", no. ; 20180901, 26 September 2018 (2018-09-26), XP051519464, Retrieved from the Internet [retrieved on 20180926]
INTERDIGITAL INC: "Dual Connectivity Configuration in INACTIVE for MR-DC", vol. RAN WG2, no. Gothenburg, Sweden; 20180820 - 20180824, 10 August 2018 (2018-08-10), XP051521116, Retrieved from the Internet [retrieved on 20180810]
Attorney, Agent or Firm:
AYOUB, Nabil (SE)
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