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    • 75. 发明授权
    • Mobile communication system
    • 移动通信系统
    • US08908642B2
    • 2014-12-09
    • US13389654
    • 2010-08-11
    • Katsutoshi NishidaTakashi KoshimizuToshiyuki Tamura
    • Katsutoshi NishidaTakashi KoshimizuToshiyuki Tamura
    • H04W36/00H04L29/06H04W88/06
    • H04W36/0022H04L65/1016H04L65/103H04L65/104H04W88/06
    • In a mobile communication system capable of switching between a first communication state and a second communication state, in a case of a first communication state, a VoIP media signal is exchanged between a mobile station. UE #1 and a mobile station UE #2 via an LTE radio access system and a node S-GW, a VoIP control signal is exchanged via the LTE radio access system, the node S-GW, and IMS, and in a case of a second communication state, a circuit-switched signal is exchanged between the mobile station UE #1 and an enhanced MSC/MGW via a 2G/3G radio access system, the VoIP media signal is exchanged between the enhanced MSC/MGW and the mobile station UE #2 via the node S-GW, and the VoIP control signal is exchanged between the enhanced MSC/MGW and the mobile station UE #2 via the node S-GW and the IMS.
    • 在能够在第一通信状态和第二通信状态之间切换的移动通信系统中,在第一通信状态的情况下,在移动台之间交换VoIP媒体信号。 UE#1和移动台UE#2经由LTE无线接入系统和节点S-GW,经由LTE无线接入系统,节点S-GW和IMS交换VoIP控制信号,在 第二通信状态,经由2G / 3G无线接入系统在移动台UE#1和增强型MSC / MGW之间交换电路交换信号,在增强型MSC / MGW与移动台之间交换VoIP媒体信号 经由节点S-GW的UE#2,经由节点S-GW和IMS在增强型MSC / MGW与移动台UE#2之间交换VoIP控制信号。