# US 12,604,292 B2 · Relay communication method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,292 B2 - Document ID: US12604292B2 - Status: Granted - Kind: B2 - Application number: 18/333,311 - Filed: 2023-06-12 - Published: 2023-10-19 - Granted: 2026-04-14 - Earliest claimed: 2020-12-18 - Assignees: Koninklijke Philips N.V. - Applicants: Koninklijke Philips N.V. - Inventors: Wen Wang; Qian Zheng; Zhenhua Xie - Web page: https://patentgrep.com/patent/US12604292B2 ## CPC - H04W 60/04: using triggered events - H04W 76/14: Direct-mode setup - H04W 40/22: using selective relaying for reaching a BTS [Base Transceiver Station] or an access point - H04W 48/12: using downlink control channel - H04W 76/20: Manipulation of established connections - H04W 8/26: Network addressing or numbering for mobility support - H04W 76/22: Manipulation of transport tunnels - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 84/042: {Public Land Mobile systems, e.g. cellular systems} - H04W 88/04: adapted for relaying to or from another terminal or user - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract This application discloses a relay communication method and apparatus, and pertains to the field of wireless communication technologies. The relay communication method performed by a first terminal includes: sending first information to a second terminal. The first information is used to indicate information related to a serving cell for the first terminal or used to indicate that mobility registration updating or radio access network-based notification area updating is performed by the second terminal. ## Claims ### Claim 1 A method comprising: sending first information to a second terminal, wherein the first information is used to indicate information or used to indicate that mobility registration updating or radio access network-based notification area updating, wherein the information is related to a serving cell for a first terminal, wherein the radio access network-based notification area updating is performed by the second terminal, receiving second information sent by a second terminal before the sending of the first information, wherein the second information comprises state information of the second terminal; and determining content of the first information based on the second information before the sending of the first information; wherein the state information indicates that the second terminal is in a connection management idle state, wherein the second terminal is in both a connection management connected state and an radio resource control inactive state, or the second terminal is in a connection management connected state. ### Claim 2 (depends on 1) The method according to claim 1, wherein the information related to the serving cell for the first terminal comprises at least one of the following: a cell identifier, a public land mobile network identifier, a tracking area code, or a radio access network-based notification area code. ### Claim 3 (depends on 1) The method according to claim 1, further comprising: receiving dedicated system information wherein the dedicated system information comprises the information; wherein the dedicated system information is carried in a handover command or a radio resource control reconfiguration information. ### Claim 4 (depends on 1) The method according to claim 1, further comprising receiving third information before the sending of the first information, wherein the third information comprises configuration information of a registration area and/or radio access network-based notification area of the second terminal. ### Claim 5 (depends on 4) The method according to claim 4, further comprising determining whether to send the first information based on a matching condition of the third information and the information related to the serving cell for the first terminal after the receiving third information, wherein the determining comprises: determining the sending the first information if the registration area does not comprise at least one of a public land mobile network identifier or a tracking area code in the information related to the serving cell for the first terminal; or determining the sending the first information if the radio access network-based notification area of the second terminal in the third information does not comprise a combination of at least one of a cell identifier, a public land mobile network identifier, a tracking area code, or a radio access network-based notification area code in the information related to the serving cell for the first terminal. ### Claim 6 (depends on 1) The method according to claim 1, wherein the sending, by a first terminal, first information comprises sending the first information in a discovery stage, connection establishing stage, or after connection has been established regarding the second terminal. ### Claim 7 A first terminal comprising: a processor circuit and a memory circuit, wherein the memory circuit is arranged to store instructions for the processor circuit, wherein the processor circuit is arranged to send first information to a second terminal, wherein the first information is used to indicate information or used to indicate that mobility registration updating or radio access network-based notification area updating, wherein the information is related to a serving cell for a first terminal, wherein the radio access network-based notification area updating is performed by the second terminal, wherein the processor circuit is arranged to receive second information, wherein the second information comprises state information of the second terminal, wherein the processor circuit is arranged to determine content of the first information based on the second information, wherein the state information of the second terminal comprises the second terminal is in a connection management idle state, wherein the second terminal is in both a connection management connected state and an radio resource control inactive state, or the second terminal is in a connection management connected state. ### Claim 8 (depends on 7) The first terminal according to claim 7, wherein the information related to the serving cell for the first terminal comprises at least one of the following: a cell identifier, a public land mobile network identifier, a tracking area code, or a radio access network-based notification area code. ### Claim 9 (depends on 7) The first terminal according to claim 7, wherein the processor circuit is arranged to receive third information, wherein the third information comprises configuration information of a registration area and/or radio access network-based notification area of the second terminal.