CPC H04W 80/10 (2013.01) [H04L 65/1016 (2013.01); H04L 65/1033 (2013.01); H04L 65/1045 (2022.05); H04L 65/1069 (2013.01); H04L 65/1073 (2013.01); H04L 65/1104 (2022.05); H04W 4/16 (2013.01); H04W 12/04 (2013.01); H04W 12/35 (2021.01); H04L 9/30 (2013.01); H04W 12/02 (2013.01); H04W 12/72 (2021.01)] | 20 Claims |
1. An apparatus comprising:
a network interface configured to
receive a session initiation protocol register request message for restricted local operator services (RLOS) at a Proxy Call Session Control Function (P-CSCF), the session initiation protocol register request message including an Internet Protocol (IP) multimedia public user identification for a user equipment (UE),
forward the session initiation protocol register request message to a Serving Call Session Control Function (S-CSCF), and
receive a UE identifier in a 200 OK response in response to forwarding the session initiation protocol register request message at the P-CSCF from the S-CSCF; and
a controller coupled to the network interface, the controller configured to cipher signaling using a security key for the UE in response to receiving the 200 OK response.
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