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发明授权
CN101577878B 一种语音业务连续性切换失败时的处理方法 有权

一种语音业务连续性切换失败时的处理方法
摘要：
一种语音业务连续性切换失败时的处理方法，该方法包括：UE在进行语音业务连续性切换，将会话从LTE/SAE网络接入切换到CS域接入失败后，UE、或增强MSC向SCC AS发送返回原接入信道通知消息；SCC AS将UE与SCC AS之间在进行所述语音业务连续性切换前建立的所述会话的承载资源、与所述会话的远端会话承载资源相连，使UE返回原接入信道进行所述会话。采用本发明的方法，解决了当无法成功地将会话从LTE/SAE网络接入切换到CS域接入，需要返回原接入信道时，需要UE重新建立一个会话Leg的问题，节约了通信资源，减小了用户设备的复杂度。
摘要（英）：

The invention provides a method for processing voice service continuity switching failure. The method comprises the following steps that: after UE performs voice service continuity switching and failsto switch a session from LTE/SAE network access to CS domain access, the UE or a enhanced MSC sends a notification message for returning to an original access channel to an SCC AS; and the SCC AS connects bearing resources of the session and remote session bearing resources of the session, which are established between the UE and the SCC AS before the voice service continuity switching is performed, and enables the UE to return to the original access channel to perform the session. The method has the advantages of solving the problem that the UE needs to re-establish a session Leg when the UEcannot successfully switch the session from the LTE/SAE network access to the CS domain access and needs to return to the original access channel, saving communication resources and reducing the complexity of user equipment.

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