Method for changing control function of processing proxy call conversation by IP multimedia subsystem

A technology of session control function and multimedia subsystem, applied in the field of communication, can solve problems such as change

Inactive Publication Date: 2008-02-27
ZTE CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a method for processing P-CSCF changes in the IMS network, and to solve the problem that the user registration status cannot be known in time when the registered P-CSCF is changed

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  • Method for changing control function of processing proxy call conversation by IP multimedia subsystem
  • Method for changing control function of processing proxy call conversation by IP multimedia subsystem

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Embodiment Construction

[0026] In order to promptly solve the problem of data redundancy when the P-CSCF is changed due to reasons such as user roaming, the core idea of ​​the technical solution of the present invention is: when the S-CSCF receives a registration request message, it checks whether the P-CSCF registered by the user is If there is a change, send a subscription notification message to the original registered P-CSCF to notify the original registered P-CSCF that the user's registration status has changed, and the original P-CSCF can delete the user data according to the subscription notification message.

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Figure 3 describes an embodiment of the present invention, that is, when a user roams and the registered P-CSCF changes, the processing flow of the S-CSCF, P-CSCF1 in the figure is the original registered P-CSCF, P- CSCF2 is a newly registered P-C...

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Abstract

This invention discloses a method for processing variation of proxy call control function of IP multimedia system, in which, after receiving registriation request sent by a user, S-CSCF tansmits a subscription notification message to P-CSCF1 labeling a change of the user registration state if it tests that P-CSCF registered by the user has been changed from the first proxy call session control function P-CSCF1 to a second P-CSCF2, which resolves the problem of data redundancy on the original P-CSCF due to the change of the registration state of the user.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, relates to a method for processing proxy call session control function change in an IP multimedia subsystem. Background technique [0002] The IP Multimedia Subsystem (IMS for short) is based on the SIP protocol (Session Initiation Protocol, Session Initiation Protocol), which is an application layer protocol for creating, modifying, and terminating sessions between two or more parties. The main functional entities in IMS include Call Session Control Function (Call Session Control Function, CSCF for short) used to control functions such as user registration and session control, and Home Subscriber Server (Home Subscriber Server) used to centrally manage user subscription data. , referred to as HSS), and an application server (Application Server, referred to as AS) for providing various business logic control functions. [0003] Fig. 1 is a flowchart of IMS user registrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04Q7/22H04W60/00H04W68/00
Inventor 王斌盛国平张宝健
Owner ZTE CORP
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