# US 2026/0101166 A1 · Method and apparatus for processing emergency call, and network-side device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0101166 A1 - Document ID: US20260101166A1 - Status: Published application - Kind: A1 - Application number: 19/416,926 - Filed: 2025-12-11 - Published: 2026-04-09 - Earliest claimed: 2023-06-12 - Assignees: Vivo Mobile Communication Co., Ltd. - Applicants: Vivo Mobile Communication Co., Ltd. - Inventors: Hui JIN; Wen WANG - Web page: https://patentgrep.com/patent/US20260101166A1 ## CPC - H04W 4/90: Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS] - H04W 76/50: for emergency connections - H04L 12/1407: {Policy-and-charging control [PCC] architecture} - H04M 15/66: {Policy and charging system} - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - H04W 88/04: adapted for relaying to or from another terminal or user - H04W 92/18: between terminal devices - H04W 76/11: Allocation or use of connection identifiers - H04W 88/18: Service support devices; Network management devices - 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) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract An emergency call handling method, includes: receiving, by a first network element, a first emergency call request sent by a remote terminal; obtaining, by the first network element, an identifier of a relay terminal corresponding to the remote terminal; and sending, by the first network element, a second emergency call request to a second network element, where the second emergency call request carries the identifier of the relay terminal. ## Claims ### Claim 1 An emergency call handling method, comprising: receiving, by a first network element, a first emergency call request sent by a remote terminal; obtaining, by the first network element, an identifier of a relay terminal corresponding to the remote terminal; and sending, by the first network element, a second emergency call request to a second network element, wherein the second emergency call request carries the identifier of the relay terminal. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first emergency call request carries an access type, and a value of the access type comprises any one of the following: 3rd Generation Mobile Communications Partnership Project-New Radio-Short Range Service-Layer 3 User Equipment to Network Relay (3GPP-NR-ProSe-L3UNR); or 3rd Generation Mobile Communications Partnership Project Evolved Universal Terrestrial Radio Access Network-Short Range Service-User Equipment to Network Relay (3GPP-E-UTRAN-ProSe-UNR). ### Claim 3 (depends on 2) The method according to claim 2, wherein the sending, by the first network element, a second emergency call request to a second network element comprises: sending, by the first network element, the second emergency call request carrying the identifier of the relay terminal to the second network element based on the value of the access type. ### Claim 4 (depends on 1) The method according to claim 1, wherein the first emergency call request carries an access type, and the obtaining, by the first network element, the identifier of the relay terminal comprises: obtaining, by the first network element, the identifier of the relay terminal based on a value of the access type. ### Claim 5 (depends on 4) The method according to claim 4, wherein the obtaining, by the first network element, the identifier of the relay terminal corresponding to the remote terminal based on the access type comprises: determining, by the first network element based on the value of the access type, that the first emergency call request is sent by the remote terminal through the relay terminal; and obtaining, by the first network element, the identifier of the relay terminal. ### Claim 6 (depends on 1) The method according to claim 1, wherein the obtaining, by the first network element, the identifier of the relay terminal comprises one of the following: obtaining, by the first network element, the identifier of the relay terminal locally; or obtaining, by the first network element, the identifier of the relay terminal from a third network element. ### Claim 7 (depends on 6) The method according to claim 6, wherein the third network element comprises a policy control function (PCF). ### Claim 8 (depends on 1) The method according to claim 1, wherein that the second emergency call request carries the identifier of the relay terminal comprises: the identifier of the relay terminal is carried in a message header of the second emergency call request. ### Claim 9 (depends on 8) The method according to claim 8, wherein the message header comprises at least one of the following: a Contact message header; a From message header; or a P-Access-Network-Info message header. ### Claim 10 (depends on 1) The method according to claim 1, wherein the identifier of the relay terminal comprises at least one of the following: a mobile station international integrated services digital network (ISDN) number of the relay terminal; a generic public subscription identifier of the relay terminal; an international mobile subscriber identity of the relay terminal; or a subscription permanent identifier of the relay terminal. ### Claim 11 (depends on 1) The method according to claim 1, wherein the first network element comprises a proxy call session control function (P-CSCF), and the second network element comprises an emergency call session control function (E-CSCF). ### Claim 12 An emergency call handling method, comprising: receiving, by a second network element, a second emergency call request sent by a first network element, wherein the second emergency call request carries an identifier of a relay terminal; and sending, by the second network element, the identifier of the relay terminal to a fourth network element. ### Claim 13 (depends on 12) The method according to claim 12, wherein the second emergency call request carries an access type, and a value of the access type comprises any one of the following: 3rd Generation Mobile Communications Partnership Project-New Radio-Short Range Service-Layer 3 User Equipment to Network Relay (3GPP-NR-ProSe-L3UNR); or 3rd Generation Mobile Communications Partnership Project Evolved Universal Terrestrial Radio Access Network-Short Range Service-User Equipment to Network Relay (3GPP-E-UTRAN-ProSe-UNR). ### Claim 14 (depends on 13) The method according to claim 13, wherein the method further comprises: obtaining, by the second network element based on the value of the access type, the identifier of the relay terminal carried in the second emergency call request. ### Claim 15 (depends on 14) The method according to claim 14, wherein the obtaining, by the second network element based on the value of the access type, the identifier of the relay terminal carried in the second emergency call request comprises: determining, by the second network element based on the value of the access type, that the second emergency call request is triggered by a remote terminal connected through the relay terminal; and obtaining, by the second network element, the identifier of the relay terminal carried in the second emergency call request. ### Claim 16 (depends on 12) The method according to claim 12, wherein the identifier of the relay terminal is carried in a message header of the second emergency call request. ### Claim 17 (depends on 16) The method according to claim 16, wherein the message header comprises one of the following: a contact Contact message header; a from From message header; or a P-Access-Network-Info P-Access-Network-Info message header. ### Claim 18 (depends on 12) The method according to claim 12, wherein the first network element comprises a proxy call session control function (P-CSCF), the second network element comprises an emergency call session control function (E-CSCF), and the fourth network element comprises a location retrieval function (LRF). ### Claim 19 (depends on 12) A network-side device, comprising a processor and a memory, wherein the memory stores a program or instructions capable of running on the processor, and when the program or instructions are executed by the processor, the steps of the emergency call handling method according to claim 12 are implemented. ### Claim 20 A network-side device, comprising a processor and a memory, wherein the memory stores a program or instructions capable of running on the processor, and the processor, when executing the program or instructions, is configured to: receive a first emergency call request sent by a remote terminal; obtain an identifier of a relay terminal corresponding to the remote terminal; and send a second emergency call request to a second network element, wherein the second emergency call request carries the identifier of the relay terminal.