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Method, equipment and system for switching voice business

A technology for voice services and handover requests, applied in electrical components, wireless communication, connection management, etc., and can solve problems such as inability to solve reverse handover

Inactive Publication Date: 2009-07-01
HUAWEI TECH CO LTD
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Problems solved by technology

[0009] However, the existing technical solutions can only solve the problem of switching voice services from the PS domain of the SAE / LTE network to the CS domain of the 2G / 3G network, and cannot solve the problem of switching back to the SAE / LTE network from the CS domain of the 2G / 3G network. The problem with the PS domain

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  • Method, equipment and system for switching voice business
  • Method, equipment and system for switching voice business
  • Method, equipment and system for switching voice business

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Embodiment Construction

[0027] Based on the existing eMSC technical solution, firstly, ensure that the eMSC itself can independently complete the functions provided by the existing solution. On this basis, whether switching from SAE / LTE to 2G / 3G or switching from 2G / 3G to SAE / LTE, eMSC is always the anchor point of switching. In order to ensure that the PS context can still be retained when switching back from 2G / 3G, when the voice service is switched from the SAE / LTE network to the 2G / 3G network, the MME can send a normal PS switching command to the eMSC. After receiving the command, the eMSC will PS context is saved locally. Some PS contexts are saved with a time limit. For example, the packet data protocol (PacketData Protocol, PDP) context will be deactivated when it times out. Therefore, when saving the PS context, the eMSC should ignore all related timers and keep the PS context locally. To switch back to the SAE / LTE network.

[0028] The eMSC referred to here is a logical entity, which may b...

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Abstract

The invention discloses a voice service handoff method which comprises the following steps: when user equipment (UE) is switched to CS domain of 2G / 3G network from system architecture evolution / long term evolution (SAE / LTE) project network, the context of the UE in SAE / LTE network PS domain is saved by an evolution mobile switching centre (eMSC); and the voice service is switched from the CS domain of 2G / 3G network to the SAE / LTE network according to the eMSC saved context of UE in PS domain of SAE / LTE network. The invention further discloses a network system in which eMSC, SAE / LTE network and 2G / 3G network coexist. The scheme of the invention realizes that UE performing voice service is switched from the SAE / LTE network to the 2G / 3G network, and also ensures that SAE / LTE network is correctly resected.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a voice service switching method, device and system. Background technique [0002] After years of deployment, 2G / 3G networks can be regarded as a kind of comprehensive coverage to some extent. With the development of System Architecture Evolution (SAE) / Long Term Evolution (Long Term Evolution, SAE / LTE) network technology, the SAE / LTE network has covered some urban areas and traffic hot spots, resulting in the current communication In the network, SAE / LTE network and 2G / 3G network coexist. [0003] According to different network bearer mechanisms, the voice services of mobile communications can be divided into the following categories: [0004] The first type is a conversational service carried by a circuit switching (Circuit Switching, CS) domain, such as a voice call; [0005] The second type is the conversational service carried by the packet switching (Packet S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/14H04W76/02
Inventor 赵旸王济勇余勇军
Owner HUAWEI TECH CO LTD
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