# US 2017/0257784 A1 · Called service processing method, mobility management entity, and home subscriber server > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0257784 A1 - Document ID: US20170257784A1 - Status: Published application - Kind: A1 - Application number: 15/599,246 - Filed: 2017-05-18 - Published: 2017-09-07 - Earliest claimed: 2014-11-19 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Guoyu NI; Rui WANG; Guobao XI - Web page: https://patentgrep.com/patent/US20170257784A1 ## CPC - H04W 24/04: Arrangements for maintaining operational condition - H04W 8/04: Registration at HLR or HSS [Home Subscriber Server] - H04W 36/00224: {between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]} - H04L 69/40: for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection (management of faults, events, alarms or notifications in data switching networks H04L41/06) - 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 invention discloses a called service processing method, a mobility management entity, and a home subscriber server. The method includes: generating, by an MME, VOPS capability indication information according to a faulty state of a PGW after determining that the PGW in which UE is located is faulty, where the VOPS capability indication information is used to indicate that a network in which the UE is located does not support VOPS; and sending, by the MME, the VOPS capability indication information to an HSS. According to the called service processing method, the mobility management entity, and the home subscriber server provided in embodiments of the present invention, a called service is not affected after a PGW is faulty. ## Claims ### Claim 1 A called service processing method, comprising: generating, by a mobility management entity (MME), voice over packet switch (VOPS) capability indication information according to a faulty state of a packet data network gateway (PGW) after determining that the PGW in which a user equipment is located is faulty, wherein the VOPS capability indication information is used to indicate that a network in which the user equipment is located does not support VOPS; and sending, by the MME, the VOPS capability indication information to a home subscriber server (HSS). ### Claim 2 (depends on 1) The method according to claim 1, wherein generating the VOPS capability indication information comprises: after determining that the PGW in which the UE is located is faulty, receiving, by the MME, a domain selection data query request sent by the HSS, and generating the VOPS capability indication information according to the domain selection data query request and the faulty state of the PGW. ### Claim 3 (depends on 1) The method according to claim 1, wherein before generating the VOPS capability indication information, the method further comprises: determining, by the MME, that the PGW is faulty; and sending, by the MME, a network element notification message to the HSS, wherein the network element notification message is used to indicate that the HSS needs to query domain selection data in real time. ### Claim 4 A mobility management entity (MME), comprising a processor, a transceiver and a non-transitory computer readable storage medium, wherein the non-transitory computer readable storage medium stores a program, and wherein the processor is configured to execute the program to facilitate performance of the following: determining that a packet data network gateway (PGW) in which a user equipment is located is faulty; and generating voice over packet switch (VOPS) capability indication information according to a faulty state of the PGW after the PGW in which the user equipment is located is faulty, wherein the VOPS capability indication information indicates that a network in which the UE is located does not support VOPS; and wherein the transceiver is configured to send the VOPS capability indication information to a home subscriber server (HSS). ### Claim 5 (depends on 4) The MME according to claim 4, wherein the transceiver is configured to: after the PGW in which the UE is located is faulty, receive a domain selection data query request sent by the HSS; and wherein generating the VOPS capability indication information comprises: generating the VOPS capability indication information according to the domain selection data query request and the faulty state of the PGW. ### Claim 6 (depends on 4) The MME according to claim 4, wherein the transceiver is configured to send a network element notification message to the HSS after the PGW in which the UE is located is faulty and before the VOPS capability indication information is generated, wherein the network element notification message indicates that the HSS needs to query domain selection data in real time. ### Claim 7 A home subscriber server (HSS), comprising: a receiver, configured to receive voice over packet switch (VOPS) capability indication information sent by a mobility management entity (MME), wherein the VOPS capability indication information is generated by the MME according to a faulty state of a packet data network gateway (PGW) after the MME determines that the PGW in which a user equipment is located is faulty; and a sender, configured to send the VOPS capability indication information to an application server for instructing the application server to process a called service of the user equipment via circuit switched fallback (CSFB). ### Claim 8 (depends on 7) The HSS according to claim 7, wherein the receiver is configured to receive, before receiving the VOPS capability indication information sent by the MME, a domain selection data query notification sent by the application server; wherein the sender is configured to: respond to the domain selection data query notification, and send a domain selection data query request to the MME; and wherein the VOPS capability indication information is generated by the MME according to the domain selection data query request and the faulty state of the PGW after the MME determines that the PGW in which the user equipment is located is faulty. ### Claim 9 (depends on 8) The HSS according to claim 8, wherein the receiver is configured to receive, before receiving the domain selection data query notification sent by the application server, a network element notification message sent by the MME, and the network element notification message indicates that the HSS needs to query domain selection data in real time. ### Claim 10 (depends on 7) The HSS according to claim 7, wherein the receiver is configured to: receive, before receiving the VOPS capability indication information sent by the MME, a domain selection data query notification sent by the application server; and wherein the sender is configured to: respond to the domain selection data query notification, and send the VOPS capability indication information to the application server.