# US 2020/0288366 A1 · Method and Apparatus for Processing Link Establishment Failure, and Computer Storage Medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288366 A1 - Document ID: US20200288366A1 - Status: Published application - Kind: A1 - Application number: 16/756,328 - Filed: 2017-10-20 - Published: 2020-09-10 - Earliest claimed: 2017-10-20 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Jianhua Liu - Web page: https://patentgrep.com/patent/US20200288366A1 ## CPC - H04W 36/305: {Handover due to radio link failure (control signalling for hand-off failure H04W36/0079)} - H04W 76/18: Management of setup rejection or failure - H04W 36/0007: {for multicast or broadcast services, e.g. MBMS (multicast or broadcast application services H04W4/06; resource management for broadcast services H04W72/30; connection management for selective distribution or broadcast H04W76/40)} - H04W 36/1446: {wherein at least one of the networks is unlicensed} - H04W 56/001: {Synchronization between nodes} - H04W 84/042: {Public Land Mobile systems, e.g. cellular systems} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Disclosed in the present application are a method and apparatus for processing a link establishment failure, and a computer storage medium. The method comprises: a terminal receives a first instruction message sent by a network, the first instruction message being used for instructing the terminal to perform a service link switching operation; the terminal switches a source service link to a target service link according to the first instruction message; and if the target service link fails to be established, the terminal sends second instruction information to the network, the second information being used for instructing the establishment failure of the target service link to the network. ## Claims ### Claim 1 A method for processing link establishment failure, comprising: receiving, by a terminal, a first indication message sent by a network, wherein the first indication message is used for indicating the terminal to perform a service link switching operation; switching, by the terminal, from a source service link to a target service link based on the first indication message; and based on a determination that establishment of the target service link fails, sending, by the terminal, second indication information to the network, wherein the second indication information is used for indicating to the network the establishment failure of the target service link. ### Claim 2 (depends on 1) The method of claim 1, wherein receiving, by the terminal, the first indication message sent by the network, comprises: receiving, by the terminal, the first indication message sent by the network, wherein the first indication message carries one or more types of the following information: network information of the target service link to be switched to; information about a service to be switched; terminal information of the terminal; or user information of the terminal. ### Claim 3 (depends on 2) The method of claim 2, wherein switching from the source service link to the target service link comprises: discovering and residing in, by the terminal, a target network corresponding to the target service link based on the network information in the first indication message; establishing, by the terminal, a synchronization relationship with the target network; establishing, by the terminal, a connection of the target service link with the target network; and determining, by the terminal, the service to be switched based on the information about the service in the first indication message, and switching the service to be switched to the target service link. ### Claim 4 (depends on 3) The method of claim 3, wherein before discovering and residing in the target network corresponding to the target service link, the method further comprising: parsing, by the terminal, the first indication message to obtain all information in the first indication message; and determining, by the terminal, that the terminal information in the first indication message matches with terminal information of the terminal. ### Claim 5 (depends on 4) The method of claim 4, wherein the establishment failure of the target service link refers to failure in one or more of the following operation processes: parsing, by the terminal, the first indication message to obtain all information in the first indication message; determining, by the terminal, that the terminal information in the first indication message matches with the terminal information of the terminal; discovering and residing in, by the terminal, the target network corresponding to the target service link based on the network information in the first indication message; establishing, by the terminal, the synchronization relationship with the target network; establishing, by the terminal, the connection of the target service link with the target network; or determining, by the terminal, the service to be switched based on the information about the service in the first indication message, and switching the service to be switched to the target service link. ### Claim 6 (depends on 5) The method of claim 5, wherein the second indication information comprises a message of the establishment failure of the target service link, wherein the message of the establishment failure of the target service link carries a failure cause, and the failure cause refers to identification information of a failed process. ### Claim 7 (depends on 6) The method of claim 6, wherein the message of the establishment failure of the target service link further carries information about a network supported by the terminal, and the information about the network supported by the terminal is used for indicating the network to perform the following operations: updating a target network for the terminal based on the information about the network supported by the terminal, and configuring the updated target network to the terminal. ### Claim 8 (depends on 6) The method of claim 6, wherein based on a determination that the failed process is switching the service to be switched to the target service link, the second indication information further comprises a response message, wherein the response message carries information about the service incapable of being switched to the target service link; and the method further comprises: switching, by the terminal, information about a service capable of being switched to the target service link to the target service link. ### Claim 9 (depends on 1) The method of claim 1, wherein receiving, by the terminal, the first indication message sent by the network, comprises: receiving, by the terminal, dedicated signaling or broadcast signaling sent by the network, wherein the dedicated signaling or broadcast signaling carries the first indication message. ### Claim 10 (depends on 1) The method of claim 1, wherein the network refers to a service network management module, and the service network management module is located at least in an access network or a core network. ### Claim 11 (canceled) ### Claim 12 A device for processing link establishment failure, comprising a processor and a communication device, wherein the communication device is configured to receive a first indication message sent by a network, wherein the first indication message is used for indicating a terminal to perform a service link switching operation; the processor is configured to switch from a source service link to a target service link based on the first indication message; and the communication device is further configured to send second indication information to the network based on a determination that establishment of the target service link fails, wherein the second indication information is used for indicating to the network the establishment failure of the target service link. ### Claim 13 (depends on 12) The device of claim 12, wherein the communication device is configured to receive the first indication message sent by the network, wherein the first indication message carries one or more of types of the following information: network information of the target service link to be switched to; information about a service to be switched; terminal information of the terminal; or user information of the terminal. ### Claim 14 (depends on 13) The device of claim 13, wherein the processor is configured to: discover and reside in a target network corresponding to the target service link based on the network information in the first indication message; establish a synchronization relationship with the target network; establish a connection of the target service link with the target network; and determine the service to be switched based on the information about the service in the first indication message and switch the service to be switched to the target service link. ### Claim 15 (depends on 14) The device of claim 14, wherein the processor is further configured to: parse the first indication message to obtain all information in the first indication message; and determine that the terminal information in the first indication message matches with terminal information of the terminal. ### Claim 16 (depends on 15) The device of claim 15, wherein the establishment failure of the target service link refers to failure in one or more of the following operation processes: parsing the first indication message to obtain all information in the first indication message; determining that the terminal information in the first indication message matches with terminal information of the terminal; discovering and residing in the target network corresponding to the target service link based on the network information in the first indication message; establishing the synchronization relationship with the target network; establishing the connection of the target service link with the target network; or determining the service to be switched based on the information about the service in the first indication message, and switching the service to be switched to the target service link. ### Claim 17 (depends on 16) The device of claim 16, wherein the second indication information comprises a message of the establishment failure of the target service link, wherein the message of the establishment failure of the target service link carries a failure cause, and the failure cause refers to identification information of a failed process. ### Claim 18 (depends on 17) The device of claim 17, wherein the message of the establishment failure of the target service link further carries information about a network supported by the terminal, and the information about the network supported by the terminal is used for indicating the network to perform the following operations: updating a target network for the terminal based on the information about the network supported by the terminal, and configuring the updated target network to the terminal. ### Claim 19 (depends on 17) The device of claim 17, wherein based on a determination that the failed process is switching the service to be switched to the target service link, the second indication information further comprises a response message, wherein the response message carries information about the service incapable of being switched to the target service link; and the processor is further configured to switch information about a service capable of being switched to the target service link to the target service link. ### Claim 20 (depends on 12) The device of claim 12, wherein the communication device is configured to receive dedicated signaling or broadcast signaling sent by the network, wherein the dedicated signaling or broadcast signaling carries the first indication message. ### Claim 21 (depends on 12) The device of claim 12, wherein a type of the target service link supports different network communication systems; or, a type of the target service link supports different frequencies of terminals of a same network communication system; or, a type of the target service link supports different public land mobile network (PLMN) networks; or, a type of the target service link supports different core network entities or access network entities. ### Claim 22 (canceled)