# US 2021/0345284 A1 · Ue optimization to move between wireless communication networks based on suci support > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345284 A1 - Document ID: US20210345284A1 - Status: Published application - Kind: A1 - Application number: 16/938,431 - Filed: 2020-07-24 - Published: 2021-11-04 - Earliest claimed: 2020-05-01 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Naga Chandan Babu Gudivada; Sharda Ranjan; Somashekar Reddy Pinnapureddy - Web page: https://patentgrep.com/patent/US20210345284A1 ## CPC - H04W 8/26: Network addressing or numbering for mobility support - H04W 60/04: using triggered events - H04W 8/183: {Processing at user equipment or user record carrier} - H04W 8/205: {Transfer to or from user equipment or user record carrier} - H04W 60/001: {Registration rejection or failure} - H04W 60/005: {Multiple registrations, e.g. multihoming} - H04W 76/11: Allocation or use of connection identifiers - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Wireless communication techniques that include network service discovery and selection techniques in wireless communication systems are discussed. A UE may trigger a first subscription concealed identifier (SUCI) calculation associated with a first registration procedure. The first registration procedure may be used to register the UE in a first wireless communication network associated with a first radio access technology (RAT). The UE may also trigger a second registration procedure to register the UE in a second wireless communication network associated with a second RAT upon detecting a first failure instance of the first SUCI calculation. Other features are also described. ## Claims ### Claim 1 A method of wireless communication, comprising: triggering, by a user equipment (UE), a first subscription concealed identifier (SUCI) calculation associated with a first registration procedure to register the UE in a first wireless communication network associated with a first radio access technology (RAT); and triggering, by the UE, a second registration procedure to register the UE in a second wireless communication network associated with a second RAT upon detecting a first failure instance of the first SUCI calculation. ### Claim 2 (depends on 1) The method of claim 1, further comprising: removing the first RAT from a RAT priority list upon detecting the first failure instance of the first SUCI calculation. ### Claim 3 (depends on 2) The method of claim 2, wherein the first RAT is removed from the RAT priority list before the second registration procedure is triggered. ### Claim 4 (depends on 1) The method of claim 1, wherein the second registration procedure does not include a SUCI calculation. ### Claim 5 (depends on 1) The method of claim 1, further comprising: updating a RAT priority list to include the first RAT upon determining, while the UE is registered in the second wireless communication network, that a subscriber identification module (SIM) associated with the UE has been updated. ### Claim 6 (depends on 5) The method of claim 5, further comprising: triggering a second SUCI calculation associated with a third registration procedure to register the UE in the first wireless communication network associated with the first RAT included in the updated RAT priority list based, at least in part, on the determination that the SIM has been updated; and processing a confirmation message indicating that the UE is registered in the first wireless communication network associated with the first RAT based, at least in part, on successful completion of the second SUCI calculation. ### Claim 7 (depends on 1) The method of claim 1, wherein the first RAT is fifth generation new radio (5G NR) standalone (SA). ### Claim 8 An apparatus configured for wireless communication, comprising: means for triggering a first subscription concealed identifier (SUCI) calculation associated with a first registration procedure to register the UE in a first wireless communication network associated with a first radio access technology (RAT); and means for triggering a second registration procedure to register the UE in a second wireless communication network associated with a second RAT upon detecting a first failure instance of the first SUCI calculation. ### Claim 9 (depends on 8) The apparatus of claim 8, further comprising means for removing the first RAT from a RAT priority list upon detecting the first failure instance of the first SUCI calculation. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the first RAT is removed from the RAT priority list before the second registration procedure is triggered. ### Claim 11 (depends on 8) The apparatus of claim 8, wherein the second registration procedure does not include a SUCI calculation. ### Claim 12 (depends on 8) The apparatus of claim 8, further comprising means for updating a RAT priority list to include the first RAT upon determining, while the UE is registered in the second wireless communication network, that a subscriber identification module (SIM) associated with the UE has been updated. ### Claim 13 (depends on 12) The apparatus of claim 12, further comprising: means for triggering a second SUCI calculation associated with a third registration procedure to register the UE in the first wireless communication network associated with the first RAT included in the updated RAT priority list based, at least in part, on the determination that the SIM has been updated; and means for processing a confirmation message indicating that the UE is registered in the first wireless communication network associated with the first RAT based, at least in part, on successful completion of the second SUCI calculation. ### Claim 14 (depends on 8) The apparatus of claim 8, wherein the first RAT is fifth generation new radio (5G NR) standalone (SA). ### Claim 15 A non-transitory computer-readable medium having program code recorded thereon, the program code comprising: program code executable by a computer for causing the computer to trigger a first subscription concealed identifier (SUCI) calculation associated with a first registration procedure to register the UE in a first wireless communication network associated with a first radio access technology (RAT); and program code executable by a computer for causing the computer to trigger a second registration procedure to register the UE in a second wireless communication network associated with a second RAT upon detecting a first failure instance of the first SUCI calculation. ### Claim 16 (depends on 15) The non-transitory computer-readable medium of claim 15, further comprising program code executable by a computer for causing the computer to remove the first RAT from a RAT priority list upon detecting the first failure instance of the first SUCI calculation. ### Claim 17 (depends on 16) The non-transitory computer-readable medium of claim 16, wherein the first RAT is removed from the RAT priority list before the second registration procedure is triggered. ### Claim 18 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the second registration procedure does not include a SUCI calculation. ### Claim 19 (depends on 15) The non-transitory computer-readable medium of claim 15, further comprising program code executable by a computer for causing the computer to update a RAT priority list to include the first RAT upon determining, while the UE is registered in the second wireless communication network, that a subscriber identification module (SIM) associated with the UE has been updated. ### Claim 20 (depends on 19) The non-transitory computer-readable medium of claim 19, further comprising: program code executable by a computer for causing the computer to trigger a second SUCI calculation associated with a third registration procedure to register the UE in the first wireless communication network associated with the first RAT included in the updated RAT priority list based, at least in part, on the determination that the SIM has been updated; and program code executable by a computer for causing the computer to process a confirmation message indicating that the UE is registered in the first wireless communication network associated with the first RAT based, at least in part, on successful completion of the second SUCI calculation. ### Claim 21 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the first RAT is fifth generation new radio (5G NR) standalone (SA). ### Claim 22 An apparatus configured for wireless communication, the apparatus comprising: at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured to: trigger a first subscription concealed identifier (SUCI) calculation associated with a first registration procedure to register the UE in a first wireless communication network associated with a first radio access technology (RAT); and trigger a second registration procedure to register the UE in a second wireless communication network associated with a second RAT upon detecting a first failure instance of the first SUCI calculation. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the at least one processor is further configured to remove the first RAT from a RAT priority list upon detecting the first failure instance of the first SUCI calculation. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the first RAT is removed from the RAT priority list before the second registration procedure is triggered. ### Claim 25 (depends on 22) The apparatus of claim 22, wherein the second registration procedure does not include a SUCI calculation. ### Claim 26 (depends on 22) The apparatus of claim 22, wherein the at least one processor is further configured to update a RAT priority list to include the first RAT upon determining, while the UE is registered in the second wireless communication network, that a subscriber identification module (SIM) associated with the UE has been updated. ### Claim 27 (depends on 26) The apparatus of claim 26, wherein the at least one processor is further configured to: trigger a second SUCI calculation associated with a third registration procedure to register the UE in the first wireless communication network associated with the first RAT included in the updated RAT priority list based, at least in part, on the determination that the SIM has been updated; and process a confirmation message indicating that the UE is registered in the first wireless communication network associated with the first RAT based, at least in part, on successful completion of the second SUCI calculation. ### Claim 28 (depends on 22) The apparatus of claim 22, wherein the first RAT is fifth generation new radio (5G NR) standalone (SA).