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    • 10. 发明授权
    • Expedited call setup
    • 快速通话设置
    • US08923796B2
    • 2014-12-30
    • US13358927
    • 2012-01-26
    • Brian Stucker
    • Brian Stucker
    • H04M9/00H04L29/06H04M3/42H04L12/66H04M1/57
    • H04L12/66H04L65/1069H04M1/57H04M3/42195
    • An origination terminal initiates a call by providing a third party call control message in association with a traffic channel request. While the traffic channel is being established, the service node may initiate third party call control to initiate a call leg to the destination terminal on behalf of the origination terminal. As such, the destination call leg is initiated earlier. Since the destination call leg is initiated earlier, a corresponding ringback message indicating that a call is being presented to the called party is provided to the origination terminal sooner. When the ringback message is received quickly, a corresponding ringback indication may be presented to the caller in less time than was previously possible. The process is made even more efficient by waiting until the ringback message is received from the destination terminal before providing the SDP information, or communication information, for the origination terminal to the destination terminal.
    • 始发终端通过提供与业务信道请求相关联的第三方呼叫控制消息来发起呼叫。 当业务信道正在建立时,服务节点可以发起第三方呼叫控制,以代表始发终端发起到目的终端的呼叫支路。 因此,目的地呼叫支路较早启动。 由于目的地呼叫支路较早启动,所以将更早的向对方终端提供的指示正在向被叫方呈现呼叫的相应回铃消息。 当回铃信息被快速接收时,相应的回铃指示可以在比之前可能的更短的时间内呈现给呼叫者。 通过等待直到在向目标终端提供SDP信息或通信信息之前从目的地终端接收到回铃消息,该进程更加有效。