US 12,302,093 B2
Security context handling in 5G during idle mode
Noamen Ben Henda, Vällingby (SE); Christine Jost, Lund (SE); Karl Norrman, Stockholm (SE); and Monica Wifvesson, Lund (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Nov. 3, 2023, as Appl. No. 18/386,807.
Application 18/386,807 is a division of application No. 17/390,297, filed on Jul. 30, 2021, granted, now 11,924,630.
Application 17/390,297 is a continuation of application No. 16/714,281, filed on Dec. 13, 2019, granted, now 11,096,045, issued on Aug. 17, 2021.
Application 16/714,281 is a continuation of application No. 16/235,523, filed on Dec. 28, 2018, granted, now 10,531,292, issued on Jul. 7, 2020.
Application 16/235,523 is a continuation of application No. PCT/EP2018/052154, filed on Jan. 29, 2018.
Claims priority of provisional application 62/452,267, filed on Jan. 30, 2017.
Prior Publication US 2024/0073683 A1, Feb. 29, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 12/041 (2021.01); H04L 9/40 (2022.01); H04W 12/0433 (2021.01); H04W 36/00 (2009.01); H04W 36/38 (2009.01); H04W 48/20 (2009.01); H04W 60/02 (2009.01); H04W 36/14 (2009.01)
CPC H04W 12/041 (2021.01) [H04L 63/062 (2013.01); H04W 12/0433 (2021.01); H04W 36/0038 (2013.01); H04W 36/385 (2013.01); H04W 48/20 (2013.01); H04W 60/02 (2013.01); H04L 2463/061 (2013.01); H04W 36/142 (2023.05)] 16 Claims
OG exemplary drawing
 
1. A method implemented by a user equipment, during an idle mode, the method comprising:
sending a registration message to a target mobility management function in a wireless communication network;
receiving from the target mobility management function, responsive to the sent registration message, a key change indication indicating that a non-access stratum key has been changed; and
generating, responsive to the key change indication, a new non-access stratum key.