Single wireless channel voice business continuity field switching method

A voice service, continuity technology, applied in the field of communication, can solve the problem of not being able to return to the session channel, not receiving the handover command, etc.
CN101227677AActive Publication Date: 2008-07-23ZTE CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
ZTE CORP
Publication Date
2008-07-23

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Abstract

A domain switching process of the continuity of a single radio channel voice service comprises that an UE switches in an IMS domain from an LTE / SAM network, the LTE / SAM networking initiates the switching request from the LTE / SAM to a CS domain after building up a conversation with far-end nodes, a target GERAN / UTRAN sends the switching finish message to a VMSC when the UE is switched in the target GERAN / UTRAN of the CS domain, the VMSC sends the MAP sending finish signal message to an S-IWF to inform the S-IWF that the UE has switched in the CS switch-in network from the LTE / SAE network, an VCC AS is informed to release the VCC AS of the conversation to the IMS network resource of the LTE / SAE network after the UE sends the switching finish message or after the S-IWF has received the MAP sending finish signal message. And the single radio channel voice service can return back to the original conversation channel according to the original conversation resource when the UE switching is failed.
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Description

technical field

[0001] The present invention relates to the field of communications, and more particularly, relates to a method for accessing single wireless channel voice service continuity ( Single Radio VoiceCall Continuity, referred to as SRVCC) domain switching method. Background technique

[0002] In order to ensure the continuity of voice services between the circuit (Circuit Switched, referred to as CS) domain and the IP (Internet Protocol, Internet Protocol) multimedia subsystem (IP Multimedia Core Network Subsystem, referred to as IMS) domain, that is, Voice Call Continuity (Voice Call Continuity) , referred to as VCC), the traditional solution is shown in Figure 1:

[0003] Dual-mode user equipment (User Equipment, referred to as UE), registered in both the CS domain and the IMS domain, when the UE initiates a voice service in the CS domain or the IMS domain, it is anchored to the voice service continuity application server (Voice Call Continuity Application Ser...

Claims

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