CPC H04L 45/14 (2013.01) [H04L 45/028 (2013.01); H04W 8/02 (2013.01); H04W 8/08 (2013.01); H04W 24/04 (2013.01); H04W 36/0033 (2013.01); H04W 60/005 (2013.01); H04W 60/04 (2013.01); H04W 60/06 (2013.01); H04W 76/27 (2018.02); H04W 88/06 (2013.01); H04W 8/10 (2013.01); H04W 8/12 (2013.01); H04W 8/245 (2013.01)] | 10 Claims |
1. A method performed by a user equipment (UE) in a communication system, the method comprising:
receiving information including updated routing ID and an indication to initiate a registration procedure, and
in case that the UE is registered over a non-3rd generation partnership project (non-3GPP) access and has an emergency service ongoing over the non-3GPP access, the method further comprising:
waiting until the emergency service is completed;
releasing a non-access stratum (NAS) signaling connection locally and entering an IDLE mode over the non-3GPP access, after waiting the emergency service is completed;
performing a de-registration procedure; and
initiating a registration procedure for initial registration.
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