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Method and device for maintaining call continuity

A voice call and session switching technology, which is applied in the field of communication, can solve problems affecting the user's normal voice service and media interruption, and achieve the effect of keeping the user's call continuous

Active Publication Date: 2012-07-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, when a user roams to a visited network and triggers SRVCC handover, during the media path handover process on the access side, border gateways (for example: Interconnection Border Control Function (IBCF, Interconnection Border Control Function, IBCF) are deployed between operator networks. ) or the Transition Gateway (Transition Gateway, TrGW)) may modify the Session Description Protocol (Session Description Protocol, SDP) information due to IP address conversion, thereby triggering the SCC AS to perform the operation of updating the remote media path, which may cause the media of the user call Interruption, affecting the normal voice service of the user

Method used

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  • Method and device for maintaining call continuity
  • Method and device for maintaining call continuity

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Embodiment Construction

[0044] 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 making creative efforts belong to the protection scope of the present invention.

[0045]figure 1 A flowchart of an embodiment of the method for maintaining call continuity provided by the present invention, such as figure 1 As shown, the method includes:

[0046] S101. Receive a first Internet Protocol Multimedia Subsystem IMS session switching message sent by an access switching entity, where the first IMS session switching message is used to replace the first session with a second session during a continuous SRVCC switching process of a s...

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Abstract

Embodiments of the present invention relates to a method and a device for maintaining call continuity. The method comprises: receiving a first Internet protocol multimedia subsystem (IMS) session switching message sent by a access switching entity, the first IMS session switching message being used for indicating a first session is replaced by a second session during a switching process of single radio voice call continuity (SRVCC), and the first IMS session switching message carrying a session identifier of the first session; searching for the first session according to the session identifier of the first session and acquiring a session description protocol (SDP) message corresponding to a remote media path of the first session; sending a second IMS session switching message to a service centralization and continuity application server (SCCAS), the second IMS session switching message carrying a SDP message corresponding to the remote media path of the first session. In the embodiments of the invention, the continuity of maintaining user calls during the SRVCC process is realized.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular to a method and device for maintaining call continuity. Background technique [0002] Voice over LTE (VoLTE) over Long Term Evolution (LTE) is a network that uses an Internet Protocol Multimedia Subsystem (IP Multimedia Subsystem, IMS) network to provide interpersonal communication over wireless access in a full packet mode. As data traffic gradually surpasses voice and becomes the mainstream of user consumption, full-packet wireless networks such as LTE are increasingly widely used. [0003] Single Radio Voice Call Continuity (Single Radio Voice Call Continuity, SRVCC) is a technology that provides switching of VoLTE voice services to Circuit Switched (Circuit Switched, CS) and continues to maintain the technology, so that users' voice services can be transmitted across LTE It does not need to be re-established after the boundary, which improve...

Claims

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Application Information

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IPC IPC(8): H04W36/00H04W76/04
CPCH04W36/14H04W36/00226
Inventor 周敬华张朝辉黄锴
Owner HUAWEI TECH CO LTD
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