Method for achieving single radio voice call continuity and single radio voice call continuity system
An implementation method and continuous technology, applied in the field of communication, can solve problems such as long call interruption time and prolonged transmission of IMS signaling, and achieve the effect of avoiding update operation and reducing interruption time
Active Publication Date: 2015-05-13
ZTE CORP
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Problems solved by technology
[0050] It can be seen from the above that since the SC AS set in the home network does not anchor the media path, the existing single-mode service continuity implementation method needs to perform an update operation on the remote user in steps 310-311, and The transmission delay of the IMS signaling for the update operation is relatively long, which will cause a long time to wait for the new media path to be established after the CS media is established, thus causing the call interruption time to be too long
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[0106] The core idea of the present invention is to use the PGW or GGSN in the PS network as the signaling anchor point of the IMS session. Update the near-end of the media path of the original session, and keep the far-end media path unchanged.
[0107] The present invention will be described in detail below with reference to the drawings and embodiments.
[0108] First Architecture Embodiment
[0109] Figure 4 is a schematic diagram of a first architecture embodiment of single-mode service continuity in the present invention, Figure 4 Describes the relevant parts or network elements of the network that realize single-mode service continuity, and the interface or connection relationship between them; the specific description is as follows:
[0110] Related network element description:
[0111] UE: user terminal equipment with single-mode service continuity capability;
[0112] CS network: a network that provides users with traditional CS services;
[0113] PS netw...
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The invention provides a method for achieving single radio voice call continuity (SRVCC). The method comprises the following steps: user equipment (UE) establishes an IP multimedia core network subsystem (IMS) session anchored to a signaling anchor point with a remote user via a pocket switch (PS) network and transmits the media data of the IMS session via a first media path and a second media path; an enhanced mobile switch center (eMSC) sends a call request for switching the IMS session to the signaling anchor point after a switch request sent by the PS network and used for switching the IMS session into circuit switch (CS) network access is received; the signaling anchor point connects a third media path between the newly-built eMSC and the media anchor point with the second media path and sends a call response to the eMSC after the call request is received; and the eMSC connects the third media path with the CS media path between the UE and the eMSC after the call response is received, so that the UE can continue the call with the remote user via the CS media path, the third media path and the second media path.
Description
technical field [0001] The invention relates to the communication field, in particular to a single-mode service continuity realization method and a single-mode service continuity system. Background technique [0002] IP Multimedia Core Network Subsystem (IMS for short) is an IP-based network architecture proposed by the 3rd Generation Partnership Project (3GPP for short), which builds an open and flexible service 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 triggering and control functions of services in the control layer are performed by a call session control function (Call Session Control Function, CSCF for short). The call session control function is divid...
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IPC IPC(8): H04W36/14
Inventor 谢振华郝振武陶全军
Owner ZTE CORP