Method and system for realizing single radio voice call continuity (SRVCC)

A technology of business continuity and implementation method, which is applied in the field of communication and can solve problems such as long call interruption time

Inactive Publication Date: 2011-08-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0030] The present invention provides a method and system for realizing continuous single-mode service, so as to reduce the interruption time of voice in the switching process, and solve the problem of excessive call interruption time in the existing single-mode service continuous process

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  • Method and system for realizing single radio voice call continuity (SRVCC)
  • Method and system for realizing single radio voice call continuity (SRVCC)
  • Method and system for realizing single radio voice call continuity (SRVCC)

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Embodiment Construction

[0054] In the process of single-mode business continuity, a series of IMS signaling interactions need to be performed between the SC AS and the remote end (that is, the communication peer of the UE that initiates single-mode business continuity) to complete the establishment of a new IMS media path, and the SC AS The communication path between the UE and the UE is relatively complex, the delay of IMS signaling transmission is relatively long, and the time for the UE to switch from the PS domain to the CS domain is very short, which leads to a long waiting time after the CS medium is established. The media path can only be established, so that the call interruption time is too long.

[0055] First, Embodiment 1 of the present invention will be described with reference to the accompanying drawings.

[0056] In the embodiment of the present invention, the mentioned ALG only serves the sessions of roaming users and the sessions between users in the home network and users belonging...

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Abstract

The invention provides a method and system for realizing single radio voice call continuity (SRVCC), relating to the communication field. The invention solves the problem that the call interruption time is too long in the SRVCC process. The method comprises the following steps that: a call continuity server sends an SRV update request in the session signalling path of a terminal when receiving an IMS (IP multimedia subsystem) transfer request and the SRV update request passes through an ALG (application layer gateway); and the ALG receives the SRV update request and updates the media path of the terminal. The technical scheme provided by the invention is applicable to the IMS network.

Description

technical field [0001] The present invention relates to the field of communication, in particular to a method and system for implementing single-mode service continuity in an IP (Internet Protocol, IP for short) multimedia subsystem. Background technique [0002] IP Multimedia Core Network Subsystem (IMS) is an IP-based network architecture proposed by the 3rd Generation Partnership Project (3GPP), which builds an open and flexible business environment , supports multimedia applications, and can provide users with rich multimedia services. [0003] In the IMS service system, the control layer and the service layer are separated, and the control layer does not provide specific services, but only provides necessary functions such as triggering, routing, and charging to the service layer. [0004] The service triggering and control functions in the control layer are performed by a call session control function (Call Session Control Function, CSCF for short). The call session ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/14H04W36/18H04L29/06
CPCH04L29/06217H04L65/1016H04L29/06312H04L65/1063H04W88/16H04W36/0022
Inventor 谢振华
Owner ZTE CORP
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