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    • 7. 发明申请
    • A METHOD OF AND A SYSTEM FOR ESTABLISHING A CALL OVER AN IP MULTI MEDIA COMMUNICATIONS SYSTEM AND A CIRCUIT SWITCHED COMMUNICATIONS SYSTEM
    • 一种用于建立IP多媒体通信系统和电路交换通信系统的呼叫的方法和系统
    • WO2008133492A1
    • 2008-11-06
    • PCT/NL2007/000111
    • 2007-04-26
    • TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)NOLDUS, Rogier, August, Caspar, JosephDEN HARTOG, Jos
    • NOLDUS, Rogier, August, Caspar, JosephDEN HARTOG, Jos
    • H04L29/06
    • H04L65/104H04L65/1016H04L65/1069H04W76/15H04W80/10
    • A system for and method of establishing a call between a calling user terminal (7) arranged for supporting sessions and signaling in an IP Multi media System, IMS, and a called user terminal (1) arranged for supporting connections in a Circuit Switched, CS, network and arranged for simultaneously supporting IMS signaling and CS signaling, said method being characterized by the steps of : determining by said calling user terminal a first IP address (IPl) to be used for data transfer with said called user terminal, initiating by said calling user terminal said call using IMS signaling (9) towards said called user terminal, said IMS signaling comprising said first IP address, initiating by said called user terminal in reply to said call initiation a CS connection (15) in said CS network towards an IP Access Converter (10) using CS signaling (16) and comprising said first IP address, allocating by said IP Access Converter in relation to said CS connection a second IP address (IP2) to be used for data transfer with said calling user terminal, establishing by said IP Access Converter said CS connection by providing said second IP address to said called user terminal using CS signaling, establishing by said called user terminal said call by providing said second IP address to said calling user terminal using IMS signaling, and wherein said data transfer is provided between said calling user terminal in said IMS and said IP Access Converter in said CS network using said first IP address and second IP address (14), and between said IP Access Converter in said CS network and said called user terminal through said CS connection (15).
    • 一种用于在IP多媒体系统IMS中安排用于支持会话和信令的主叫用户终端(7)之间建立呼叫的系统和方法,以及被配置为支持电路交换CS中的连接的被叫用户终端(1) 网络并且被安排为同时支持IMS信令和CS信令,所述方法的特征在于以下步骤:由所述主叫用户终端确定要用于与所述被叫用户终端进行数据传输的第一IP地址(IP1),由所述主叫用户终端发起 主叫用户终端使用IMS信令(9)向所述被叫用户终端表示呼叫,所述IMS信令包括所述第一IP地址,由所述被叫用户终端响应于所述呼叫发起,在所述CS网络中的CS连接(15)朝向 IP访问转换器(10),使用CS信令(16)并且包括所述第一IP地址,由所述IP访问转换器相对于所述CS连接分配第二IP地址(IP2)为我们 用于与所述主叫用户终端进行数据传输,由所述IP访问转换器建立所述CS连接,通过使用CS信令向所述被叫用户终端提供所述第二IP地址,由所述被叫用户终端建立所述呼叫,将所述第二IP地址提供给所述 使用IMS信令呼叫用户终端,并且其中所述数据传输在所述IMS中的所述主叫用户终端和所述CS网络中的所述IP访问转换器之间使用所述第一IP地址和第二IP地址(14)以及所述IP访问转换器 在所述CS网络和所述被叫用户终端中通过所述CS连接(15)。