US 11,917,725 B2
Method and apparatus for short code dialing for restricted services for unauthenticated user equipment
Andreas Kunz, Ladenburg (DE); and Genadi Velev, Darmstadt (DE)
Assigned to Lenovo (Singapore) Pte. Ltd., New Tech Park (SG)
Filed by Lenovo (Singapore) Pte. Ltd., New Tech Park (SG)
Filed on Nov. 6, 2022, as Appl. No. 17/981,464.
Application 17/981,464 is a continuation of application No. 17/207,655, filed on Mar. 20, 2021, granted, now 11,528,774.
Application 17/207,655 is a continuation of application No. 16/058,419, filed on Aug. 8, 2018, granted, now 10,993,282, issued on Apr. 27, 2021.
Claims priority of provisional application 62/543,180, filed on Aug. 9, 2017.
Prior Publication US 2023/0058210 A1, Feb. 23, 2023
Int. Cl. H04W 4/00 (2018.01); H04W 80/10 (2009.01); H04L 65/1033 (2022.01); H04W 4/16 (2009.01); H04W 12/30 (2021.01); H04L 65/1045 (2022.01); H04L 65/1104 (2022.01); H04L 65/1016 (2022.01); H04L 65/1069 (2022.01); H04L 65/1073 (2022.01); H04W 12/04 (2021.01); H04W 12/02 (2009.01); H04W 12/72 (2021.01); H04L 9/30 (2006.01)
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
OG exemplary drawing
 
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.