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Single radio voice call continuity transfer method, equipment and system

A wireless voice call and continuity technology, applied in the field of communication, can solve problems such as handover failure

Active Publication Date: 2014-02-05
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If there are multiple E-CSCF / EATF devices in the IMS network, the STN-SR generated by the SRVCC IWF device when the user equipment is handed over is likely to be the same as ATCF (Access Transfer Control Function) / ATGW Transfer Gateway, access switching gateway) The STN-SR generated when the user equipment initiates registration is different, making the switching fail

Method used

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  • Single radio voice call continuity transfer method, equipment and system
  • Single radio voice call continuity transfer method, equipment and system
  • Single radio voice call continuity transfer method, equipment and system

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Embodiment Construction

[0110] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0111] refer to figure 1 , figure 1 It is a flow chart of an SRVCC handover method provided by an embodiment of the present invention. Such as figure 1 As shown, the method includes the following steps:

[0112] Step 101, when the proxy-call session control function P-CSCF equipment receives the session establishment message, the P-CSCF equipment obtains the session switching number STN-SR of the single wireless voice call continuity SRVCC, and the session estab...

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Abstract

The embodiment of the invention provides a single radio voice call continuity (SRVCC) transfer method, equipment and system. According to the method, P-CSCF equipment obtains a session transfer number for SRVCC (STN-SR), the STN-SR is sent to PCRF equipment so that the PCRF equipment can send the STN-SR to an MME for storage, and therefore by means of the concise method, the situation that E-CSCF / EATF equipment chosen by I-CSCF is consistent with E-CSCF / EATF equipment chosen by call establishment is guaranteed.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for SRVCC (Single Radio Voice Call Continuity, single radio voice call continuity) switching. Background technique [0002] During the establishment of an emergency call session, when a user initiates an emergency call, the user equipment sends a call establishment request to the P-CSCF (Proxy-Call Session Control Function, proxy- Call Session Control Function) equipment, P-CSCF equipment judges it as an emergency call, sends a call establishment request to E-CSCF (Emergency-Call Session Control Function, emergency-call session control function) equipment, and then routes it to EATF by E-CSCF equipment (Emergency Access Transfer Function, emergency access transfer function) equipment, E-CSCF equipment or EATF equipment reserves STN-SR (Session Transfer Number for SRVCC, SRVCC session switching number) to prepare for the subsequent switching process of...

Claims

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Application Information

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IPC IPC(8): H04W36/00
CPCH04W36/00226
Inventor 简海燕
Owner HUAWEI TECH CO LTD
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