Method and apparatus for service recovery

Abstract

An embodiment of the invention provides a method for recovering service. The method is applied to the IMS network which comprises at least two calling conversation function entities CSCF, wherein the method comprises the following steps: detecting the multifunction of a second CSCF by a first CSCF; and transmitting informing information to the user terminal by the first CSCF, wherein, the informing information is used for triggering the user terminal for re-registering. The embodiment of invention also provides a device used for recovering service. Through using the embodiment of the invention, when the entity, such as S-CSCF or P-CSCF in network is abnormal or down-restarting and can not continuing providing service for user, other entity in the network can trigger the user terminal for re-registering. The network can still provide transmission initializing service, transmission terminating service, etc. The inferior service experience caused by the abnormity of network entity to the user is prevented.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method and device for restoring services. Background technique [0002] With the development of the communication field, IMS (IP Multimedia Subsystem, IP, multimedia subsystem) will become the core network of the next generation fixed and mobile. Therefore, there will be a development trend and network evolution process of diversified access technologies and service provision, IP-based bearer, and unified core network to IMS. Users will get better service experience in the IMS network. The structure diagram of IMS is as follows figure 1 As shown, the CSCF (Call Session Control Function, call session control function) is in the core control position in the IMS core network, responsible for registration authentication and session control of the UE, and performs IMS user The basic session routing function, and according to the IMS filtering rules signed by the user...

AI Technical Summary

Problems solved by technology

However, when an exception occurs in the network entity, the session flow of the above user will fail

For example: after the P-CSCF (Proxy CSCF, proxy CSCF) restarts or an exception occurs, if a user has registered through the P-CSCF before, when there is a final request from the user, because the P-CSCF If there is no data for the user or other abnormalities occur and the user cannot continue to provide services, a failure will be returned to the S-CSCF, causing the business process to fail

In addition, after the S-CSCF is down or abnormal, when the UE makes an initial request, the P-CSCF will not be able to send the request to the S-CSCF or the S-CSCF will not be able to continue to provide services for the user, and the P-CSCF can only return failure to the UE, causing the UE to be unable to use the originating service

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