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    • 20. 发明申请
    • CALL FORWARDING IN AN IP MULTIMEDIA SUBSYSTEM (IMS)
    • 在IP多媒体子系统(IMS)中呼叫转发
    • WO2006125474A1
    • 2006-11-30
    • PCT/EP2005/052439
    • 2005-05-27
    • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)HEIDERMARK, AlfVAN ELBURG, Hans, Erik
    • HEIDERMARK, AlfVAN ELBURG, Hans, Erik
    • H04L29/06
    • H04L65/1006H04L29/06027H04L65/4007
    • A method of handling a Session Initiation Protocol communication within an IP Multimedia Subsystem, where the communication is subject to a call forwarding operation handled by a Session Initiation Protocol Application Server. The method comprises receiving an INVITE at a Serving Call/State Control Function serving a user equipment identified by a R-URI of the INVITE, and at the Serving Call/State Control Function, adding a URI of the Serving Call/State Control Function to the INVITE route header together with an Original Dialog Identifier, and maintaining at the Serving Call/State Control Function a mapping between the Original Dialog Identifier and said R-URI. The INVITE is forwarded to said Application Server, and the R-URI changed to a URI of a user equipment to which the call is to be forwarded. A forwarding indicator is added to the INVITE header, and the INVITE returned to the Serving Call/State Control Function. At the Serving Call/State Control Function, the presence of said forwarding indicator is identified, and in response the original R-URI identified on the basis of the Original Dialog Identifier contained in the returned INVITE. Call restrictions and IFCs are identified on the basis of original R-URI.
    • 一种在IP多媒体子系统内处理会话发起协议通信的方法,其中通信受到由会话发起协议应用服务器处理的呼叫转移操作。 该方法包括:在服务于由INVITE的R-URI标识的用户设备的服务呼叫/状态控制功能处接收INVITE,并且在服务呼叫/状态控制功能处,将服务呼叫/状态控制功能的URI添加到 INVITE路由报头和原始对话标识符,并且在服务呼叫/状态控制功能处保持原始对话标识符和所述R-URI之间的映射。 INVITE被转发到所述应用服务器,并且R-URI改变为呼叫转发到的用户设备的URI。 转发指示符被添加到INVITE报头中,并且INVITE返回到服务呼叫/状态控制功能。 在服务呼叫/状态控制功能中,识别所述转发指示符的存在,并且响应于基于返回的INVITE中包含的原始对话标识符识别的原始R-URI。 在原始的R-URI的基础上确定呼叫限制和IFC。