A system and method for call service based on voice service continuity

A technology for call service and voice service, which is applied in the field of network communication and can solve problems such as call failure

Inactive Publication Date: 2008-03-19
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the GMSC cannot determine that the call has been anchored in the IMS domain, and does not need to be routed to the IMS domain again. In this way, the GMSC may be based on the static routing scheme again, or the CS-NeDS scheme based on HSS will The call is routed back to the IMS domain again, resulting in the normal anchoring process of the call from the CS to the IMS domain, and then returning to the CS domain from the IMS domain for connection, the call cannot be connected from the CS to the called terminal, causing the call to be routed from the CS domain Repeated routing loops to the IMS domain, eventually causing the call to fail

Method used

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  • A system and method for call service based on voice service continuity
  • A system and method for call service based on voice service continuity
  • A system and method for call service based on voice service continuity

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Embodiment Construction

[0130] In the static anchor point solution of the voice service continuity service, the present invention proposes a system and method for preventing routing loops. In the technical solution of the present invention, for the incoming call from the CS domain to the called user, through When the application server with the IMS-NeDS function determines that the call needs to be forwarded from the IMS domain to the CS domain and then connected to the called terminal, it will generate instruction information to directly connect the call to the called terminal, so that the network equipment in the system can identify Whether the call has been anchored in the IMS domain, so that the network device can directly continue to the called terminal for processing the call that has been anchored. For example, when the network device in the above system is GSMC, if GMSC If no instruction to directly connect the call to the called terminal is received, it is determined that the call is not anch...

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Abstract

The invention provides a system and a method for achieving calling service based on voice service continuity. In the invention, by generating indication information for connecting a call directly to a called terminal when a server having IMS-NeDS function determines that the call should be transferred from IMS domain to CS domain and then be connected to the called terminal; network devices in the system can exactly judge whether the call has been performed anchoring treatment in the IMS domain or not based on the indication information for connecting the call directly to the called terminal, so that treatment for connecting a call to a called terminal is clear and repeated route circulation of the call is prevented. The invention provides methods for preventing repeated route circulation phenomena, and the network devices, which trigger the process for connecting a call directly to a called terminal, can be equipped according to network requirements; therefore, the purpose of improving calling success rate is satisfied.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a system and method for realizing call service based on voice service continuity. Background technique [0002] From the 3GPP R5 (3rd Generation Partnership Project, the third generation mobile communication standardization partner project) stage, the UMTS (Universal Mobile Telecommunications System) core network is divided into CS (Circuit Switching), PS (Packet Switching) and IMS (IP Multimedia Subsystem) ) three subsystems. [0003] The CS domain (Circuit Switched Domain, Circuit Switched Domain) is used to provide the connection of the circuit service to the user. The CS domain mainly includes: MSC (MSC Server / CS-MGW, Mobile Switch CenterServer / CS-Media GateWay, mobile switching center server / circuit domain-media gateway), GMSC (Gateway MSC, gateway mobile switching center) and IWF (InterWorking Function , interworking function). Among them, the MSC completes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04Q7/22H04W4/16H04W8/08
Inventor 段小琴朱东铭
Owner HUAWEI TECH CO LTD
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