US 11,696,121 B2
Security for paging messages
Sudeep M. Vamanan, Nuremberg (DE); Robert Zaus, Munich (DE); Birgit Breining, Munich (DE); Chen Ho Chin, Deerlijk (BE); and Hyung-Nam Choi, Hamburg (DE)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 16/488,556
Filed by APPLE INC., Cupertino, CA (US)
PCT Filed May 3, 2017, PCT No. PCT/US2017/030724
§ 371(c)(1), (2) Date Aug. 23, 2019,
PCT Pub. No. WO2018/182759, PCT Pub. Date Oct. 4, 2018.
Claims priority of provisional application 62/478,935, filed on Mar. 30, 2017.
Prior Publication US 2020/0015076 A1, Jan. 9, 2020
Int. Cl. H04W 12/02 (2009.01); H04W 76/27 (2018.01); H04L 9/08 (2006.01); H04W 68/02 (2009.01); H04W 12/72 (2021.01); H04L 9/40 (2022.01)
CPC H04W 12/02 (2013.01) [H04L 9/0891 (2013.01); H04L 63/06 (2013.01); H04W 12/72 (2021.01); H04W 68/02 (2013.01); H04W 76/27 (2018.02)] 20 Claims
OG exemplary drawing
 
1. An apparatus of a user equipment (UE), comprising:
one or more baseband processors to derive a dynamic scrambling key in response to the UE releasing a radio resource control (RRC) connection and determine whether a non-access stratum (NAS) security mode control procedure is performed during the RRC connection, wherein, when the NAS security mode control procedure is performed during the RRC connection, the dynamic scrambling key is derived based on at least a cell identity and a NAS count value used to track a security mode complete message for the NAS security mode control procedure and, when the NAS security mode control procedure is not performed during the RRC connection, the dynamic scrambling key is derived based on at least the cell identity and a NAS count value used to track an initial uplink NAS message for RRC connection establishment; and
a memory to store the dynamic scrambling key and a temporary UE identifier (temporary UE ID) assigned to the UE;
wherein the one or more baseband processors are to monitor a paging request for a scrambled LIE identifier (UE ID) to determine if the paging request is intended for the UE by unscrambling the scrambled UE ID with the dynamic scrambling key to produce the temporary UE ID.