Time division duplex telecommunication system
    1.
    发明授权
    Time division duplex telecommunication system 失效
    时分双工电信系统

    公开(公告)号:US5416779A

    公开(公告)日:1995-05-16

    申请号:US274581

    申请日:1994-07-13

    摘要: A communication procedure suitable for a cordless telephone system involves time division duplex radio communication between a handset 11 and a base station 3 using alternating bursts of transmission over a single radio channel. Once a radio link has been set up, initial transmissions carry a synchronisation logical channel S and a signalling logical channel D multiplexed together, but the link may switch to bursts carrying a communications logical channel B for the speech data and the signalling logical channel D. Burst synchronisation is achieved by the asynchronous detection of words in a synchronisation channel S. These words have bit patterns reducing the probability of incorrect asynchronous detection of them. If one part ceases to receive handset signals from the other, it transmits a special signal, informing the other part. This enables both parts to detect the failure of a link at substantially the same time, so that their actions to re-establish the link are synchronised.

    摘要翻译: 适用于无绳电话系统的通信过程涉及手机11和基站3之间的时分双工无线电通信,其使用在单个无线电信道上的交替突发传输。 一旦建立无线电链路,初始传输携带同步逻辑信道S和复用在一起的信令逻辑信道D,但是链路可以切换到承载语音数据和信令逻辑信道D的通信逻辑信道B的突发。 突发同步通过异步检测同步信道S中的字来实现。这些字具有减少它们不正确异步检测的可能性的位模式。 如果一个部分停止从另一个部分接收手机信号,它会发送一个特殊信号,通知另一部分。 这使得两个部件能够在基本相同的时间检测到链路的故障,使得它们重新建立链路的动作被同步。