# US 12,192,946 B2 · Method and apparatus for core network registration and radio access network notification update > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,946 B2 - Document ID: US12192946B2 - Status: Granted - Kind: B2 - Application number: 17/637,300 - Filed: 2019-08-23 - Published: 2022-09-08 - Granted: 2025-01-07 - Earliest claimed: 2019-08-23 - Assignees: Lenovo (Beijing) Limited - Applicants: Lenovo (Beijing) Limited - Inventors: Lianhai Wu; Haiming Wang; Jing Han; Zhi Yan; Jie Shi - Web page: https://patentgrep.com/patent/US12192946B2 ## CPC - H04W 52/028: {switching on or off only a part of the equipment circuit blocks} - H04W 60/04: using triggered events - H04L 1/0025: {Transmission of mode-switching indication} - H04W 48/18: Selecting a network or a communication service - H04W 52/0229: {where the received signal is a wanted signal} - H04W 76/19: Connection re-establishment - H04W 76/20: Manipulation of established connections - H04W 76/14: Direct-mode setup - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present disclosure relates to methods and apparatuses. According to some embodiments of the disclosure, a method includes: receiving, at a first communication device from a second communication device, first registration information of a last serving cell, the first registration information at least including a first tracking area code and the identity of the second communication device; and determining whether to perform a registration procedure for the second communication device based on the first registration information. ## Claims ### Claim 1 A method at a user equipment (UE), the method comprising: storing first registration information of a last serving cell; receiving, from a first communication device, a message comprising second registration information of a serving cell of the first communication device, wherein the serving cell of the first communication device comprises a serving cell of a base station, and the base station is separate from the first communication device; and determining whether to perform a registration procedure based on the first registration information and the second registration information. ### Claim 2 (depends on 1) The method of claim 1, further comprising: performing the registration procedure when the second registration information does not match the first registration information. ### Claim 3 (depends on 2) The method of claim 2, further comprising determining whether the second registration information matches the first registration information. ### Claim 4 (depends on 1) The method of claim 1, wherein the first registration information indicates a first tracking area code of the last serving cell, and the second registration information indicates a second tracking area code of the serving cell of the first communication device. ### Claim 5 (depends on 4) The method of claim 4, further comprising determining whether the second registration information matches the first registration information by determining whether a first tracking area associated with the first registration information matches a second tracking area associated with the second registration information. ### Claim 6 A user equipment (UE), comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: store first registration information of a last serving cell; receive, from a first communication device, a message comprising second registration information of a serving cell of the first communication device, wherein the serving cell of the first communication device comprises a serving cell of a base station, and the base station is separate from the first communication device; and determine whether to perform a registration procedure based on the first registration information and the second registration information. ### Claim 7 (depends on 6) The UE of claim 6, wherein the at least one processor is configured to cause the UE to: perform the registration procedure when the second registration information does not match the first registration information. ### Claim 8 (depends on 7) The UE of claim 7, wherein the at least one processor is configured to cause the UE to determine whether the second registration information matches the first registration information. ### Claim 9 (depends on 8) The UE of claim 8, wherein the at least one processor is configured to cause the UE to determine whether the second registration information matches the first registration information by determining whether a first tracking area associated with the first registration information matches a second tracking area associated with the second registration information. ### Claim 10 (depends on 6) The UE of claim 6, wherein the first registration information indicates a first tracking area code of the last serving cell, and the second registration information indicates a second tracking area code of the serving cell of the first communication device. ### Claim 11 A processor for wireless communication, comprising: at least one controller coupled with at least one memory and configured to cause the processor to: store first registration information of a last serving cell; receive, from a first communication device, a message comprising second registration information of a serving cell of the first communication device, wherein the serving cell of the first communication device comprises a serving cell of a base station, and the base station is separate from the first communication device; and determine whether to perform a registration procedure based on the first registration information and the second registration information. ### Claim 12 (depends on 11) The processor of claim 11, wherein the at least one controller is configured to cause the processor to: perform the registration procedure when the second registration information does not match the first registration information. ### Claim 13 (depends on 12) The processor of claim 12, wherein the at least one controller is configured to cause the processor to determine whether the second registration information matches the first registration information. ### Claim 14 (depends on 13) The processor of claim 13, wherein the at least one controller is configured to cause the processor to determine whether the second registration information matches the first registration information by determining whether a first tracking area associated with the first registration information matches a second tracking area associated with the second registration information. ### Claim 15 (depends on 11) The processor of claim 11, wherein the first registration information indicates a first tracking area code of the last serving cell, and the second registration information indicates a second tracking area code of the serving cell of the first communication device.