Method and system for processing S-CSCF alteration in IMS network

Abstract

A method and a system for processing S-CSCF alteration in an IMS network are disclosed, the method comprises the steps that: after receiving a server assignment request sent by S-CSCF, if checking that the user represents a registered state in the HSS and the presently-registered second server calling session control function S-CSCF2 and the last-registered first server calling session control function S-CSCF are inconsistent, HSS sends a server assignment failure response to S-CSCF2 and indicates that the S-CSCF registered by a user is altered in the server assignment failure response; afterreceiving the server assignment failure response from the server, the S-CSCF2 sends a multimedia authorization request MAR to the HSS in the event that the alteration of the S-CSCF occurs under the indication in the failure response. By means of the method and the system provided by the invention, successful registration of the user can still be achieved on condition of the alteration of the S-CSCF in the IMS network, and requirements of network service can be used.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, relates to a method of changing a Serving Call Session Control Function (S-CSCF) for processing user registration in an IP Multimedia Subsystem (IPMultimedia Core Network Subsystem, IMS for short). methods and systems. Background technique [0002] The IP Multimedia Subsystem is a next-generation network standard defined by the 3rd Generation Partnership Project (3GPP). Its notable feature is that it adopts the Session Initial Protocol (SIP) system, and communication has nothing to do with access. , It can have multiple capabilities such as separation of multimedia service control function and carrying capacity, separation of call and service, separation of application and service, separation of service and network, and integration of mobile network and Internet services. [0003] The main functional entities in the IMS include the call control entity (Call Session Contro...

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Problems solved by technology

[0022] It can be seen from the above process that when the S-CSCF registered by the user is changed due to multiple disaster recovery, S-CSCF2 no longer obtains the authentication information data from the HSS because the user’s authentication data already exists locally; After the authorization is passed, when the server assignment request is sent to the HSS, the HSS checks that the S-CSCF registered this time is inconsistent with the S-CSCF assigned by the previous registration according to the protocol, and returns an error response. The existing technology does not further handle this process error , the direct registration fails, resulting in the unsuccessful registration of the user and the inability to use the service

[0023] In addition, when the S-CSCF registered by the user changes, the original registered S-CSCF cannot know, so the user data of the user cannot be deleted normally, resulting in data redundancy

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