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    • 4. 发明授权
    • Control device of mobile communication system
    • 移动通信系统控制装置
    • US07720478B2
    • 2010-05-18
    • US10395088
    • 2003-03-25
    • Takayuki IshiguroMayu YamadaSung Uk MoonHiroyuki IshiiToshiyuki FutakataTomohiro Dohi
    • Takayuki IshiguroMayu YamadaSung Uk MoonHiroyuki IshiiToshiyuki FutakataTomohiro Dohi
    • H04W36/00
    • H04W36/32H04W36/14Y02D70/00Y02D70/164
    • There is provided a control device enabling switching of communication of a mobile terminal with one system to communication with another system while reducing power consumption and workload of the mobile terminal. The control device is used in a communication system including a first mobile communication system, a second mobile communication system, and a mobile terminal being in communication with the first mobile communication system. The control device comprises a position measuring unit for measuring the position of the mobile terminal, a judgment unit for making a determination whether or not to switch the communication of the mobile terminal from the first mobile communication system to the second mobile communication system according to a position measurement result of the position measuring unit, and a switching unit for performing the above switching operation according to the determination of the judgment unit.
    • 提供了一种控制装置,其能够使移动终端与一个系统的通信切换,以与另一个系统通信,同时减少移动终端的功耗和工作量。 控制装置用于包括与第一移动通信系统通信的第一移动通信系统,第二移动通信系统和移动终端的通信系统中。 控制装置包括:位置测量单元,用于测量移动终端的位置;判断单元,用于根据第一移动通信系统确定是否将移动终端的通信从第一移动通信系统切换到第二移动通信系统 位置测量单元的位置测量结果,以及根据判断单元的确定执行上述切换操作的切换单元。
    • 7. 发明授权
    • Radio access network system, radio communication method, synchronous server and node
    • 无线接入网系统,无线通信方式,同步服务器和节点
    • US07447237B2
    • 2008-11-04
    • US10724829
    • 2003-12-02
    • Masayuki KoshinoMayu YamadaTakehiro Nakamura
    • Masayuki KoshinoMayu YamadaTakehiro Nakamura
    • H04J3/06
    • H04J3/0658H04J3/0664
    • An apparatus and method prevent an out-of-sync state of clocks from occurring in an IP network or an IP-based radio access network in which network fluctuation delays occur. A synchronous server includes a clock generator configured to periodically generate a clock and a synchronous message transmitter configured to generate a synchronous message for notifying information regarding the generated clock, and to transmit the generated synchronous message to the node using an IP packet. The node includes a time calculator configured to obtain a time of receiving the synchronous message and a clock correction processor configured to calculate a clock correction value in accordance with the time of receiving the synchronous message and the information regarding the clock notified by the synchronous message, and to correct a generated timing of a clock in the node in accordance with the clock correction value.
    • 一种装置和方法防止在IP网络或发生网络波动延迟的基于IP的无线电接入网络中发生时钟的不同步状态。 同步服务器包括被配置为周期性地生成时钟的时钟发生器和被配置为生成用于通知关于所生成的时钟的信息的同步消息的同步消息发送器,并且使用IP分组将生成的同步消息发送到节点。 节点包括:时间计算器,被配置为获得接收同步消息的时间;以及时钟校正处理器,被配置为根据接收到同步消息的时间和由同步消息通知的时钟的信息来计算时钟校正值, 并且根据时钟校正值校正所生成的节点中的时钟定时。