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    Redundant switchover system for a TDMA satellite communication equipment
    2.
    发明公开
    Redundant switchover system for a TDMA satellite communication equipment 失效
    用于TDMA卫星通信设备的冗余切换系统

    公开(公告)号：EP0119841A3

    公开(公告)日：1985-11-21

    申请号：EP84301774

    申请日：1984-03-15

    申请人： FUJITSU LIMITED

    发明人： Aoki, Shinichiro ,  Yoshizawa, Ryushiro

    IPC分类号： H04B01/74 ,  H04B07/185

    CPC分类号： H04B1/74 ,  H04B7/212

    摘要： In a radundant switchover system for a TDMA satellite communication system for relaying messages from earth station to earth station via a communication satellite, each earth station comprises an initially active TDMA terminal unit (1) and an initially stand-by TDMA terminal unit (2). Determination of loss of transmit burst synchronization in the initially stand-by terminal unit is carried out more than one round trip time period later than the determination of loss of transmit burst synchronization in the initially active terminal unit. Switching of the initially active and stand-by terminal units to the stand-by mode and the active mode, respectively, is effected when loss of transmit burst synchronization is determined in the initially active terminal unit.

    Redundant switchover system for a TDMA satellite communication equipment
    3.
    发明公开
    Redundant switchover system for a TDMA satellite communication equipment 失效
    冗余电力系统TDMA-Satellitenübertragungseinrichtung。

    公开(公告)号：EP0119841A2

    公开(公告)日：1984-09-26

    申请号：EP84301774.0

    申请日：1984-03-15

    申请人： FUJITSU LIMITED

    发明人： Aoki, Shinichiro ,  Yoshizawa, Ryushiro

    IPC分类号： H04B1/74 ,  H04B7/185

    CPC分类号： H04B1/74 ,  H04B7/212

    摘要： In a radundant switchover system for a TDMA satellite communication system for relaying messages from earth station to earth station via a communication satellite, each earth station comprises an initially active TDMA terminal unit (1) and an initially stand-by TDMA terminal unit (2). Determination of loss of transmit burst synchronization in the initially stand-by terminal unit is carried out more than one round trip time period later than the determination of loss of transmit burst synchronization in the initially active terminal unit. Switching of the initially active and stand-by terminal units to the stand-by mode and the active mode, respectively, is effected when loss of transmit burst synchronization is determined in the initially active terminal unit.

    摘要翻译： 在用于经由通信卫星将来自地球站的消息中继的TDMA卫星通信系统的广泛切换系统中，每个地球站包括最初有效的TDMA终端单元（1）和最初备用的TDMA终端单元（2） 。 在初始待机终端单元中确定发送突发同步的丢失在比起始活动终端单元中的发送突发同步丢失确定之后多于一个往返时间段执行。 当初始活动终端单元确定丢失发送脉冲串同步时，分别将初始激活和待机终端单元切换到待机模式和激活模式。