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Method and system of disaster recovery back serving call session control function

A technology for session control function and service call, applied in transmission systems, digital transmission systems, network data management, etc., and can solve problems such as poor user experience

Active Publication Date: 2013-06-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing rewind technology will cause the established call to be released, and the user experience is poor

Method used

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  • Method and system of disaster recovery back serving call session control function
  • Method and system of disaster recovery back serving call session control function
  • Method and system of disaster recovery back serving call session control function

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Embodiment Construction

[0066] The basic idea of ​​the present invention is: in the process of reverting the UE to the S-CSCF, the UE that still has call services is not reverted; specifically, the P-CSCF forwards the received registration request message of the UE to the When the I-CSCF inserts the call information of the UE into the forwarded registration request message; the I-CSCF can determine whether the UE currently has a call service according to the call information of the UE, and if there is no call service, revert the UE to the recovered Otherwise, the UE will not fall back to the recovered S-CSCF. Or, after receiving the UE's registration request message, the I-CSCF switches the UE requesting registration back to the restored S-CSCF; after receiving the registration termination request RTR message, the switched S-CSCF determines that the UE currently has call services , delete the local UE user data after the UE call is released.

[0067] The technical solution of the present invention w...

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Abstract

The invention discloses a method and system of a disaster recovery back serving call session control function. The method of the disaster recovery back serving call session control function includes that user equipment (UE) with call business is left unprocessed through changing back in the process that terminal UE changes back to the serving call session control function (S-CSCF), or, the method of the disaster recovery back serving call session control function can includes that an interrogating call session control function changes the UE which requests for registering back to a recovered S-CSCF after receiving a register request message, and the reversed S-CSCF receives a register termination request (RTR) message and deletes local UE user data after calls of the UE are released when the reversed S-CSCF determines that the UE currently has the call services. According to the method and the system of a disaster recovery back serving call session control function, the call business which is established already cannot be released by the UE in changing back process, so that changing back without call loss is achieved, and the user experience in the changing back process is greatly improved.

Description

technical field [0001] The present invention relates to a disaster recovery fallback technology, in particular to a method and system for a disaster recovery fallback service call session control function entity in an IP multimedia subsystem (IMS, IPMultimedia subsystem). Background technique [0002] IP Multimedia Subsystem (IMS, IP Multimedia subsystem) is the standard of the next generation network defined by the 3rd Generation Partnership Organization (3GPP, 3rd Generation Partnership Project), and its notable feature is the adoption of Session Initiation Protocol (SIP, Session Initiation Protocol) The system has nothing to do with communication and access, and can have various capabilities such as separation of control functions and carrying capacity of various media services, separation of calls and sessions, separation of applications and services, separation of services and networks, and integration of mobile network and Internet services. [0003] The proposal of IM...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L29/06H04W24/04
CPCH04W76/028H04W60/00H04W8/30H04W76/19
Inventor 缪永生曹刚
Owner ZTE CORP
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