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    • 2. 发明授权
    • Time slot allocation for loop networks
    • 循环网络的时隙分配
    • US5062035A
    • 1991-10-29
    • US64652
    • 1987-06-22
    • Shigeaki TanimotoTadashi KayanoHirobumi KarasawaOsamu YamagishiTomoo Kunikyo
    • Shigeaki TanimotoTadashi KayanoHirobumi KarasawaOsamu YamagishiTomoo Kunikyo
    • G06F13/372
    • G06F13/372
    • An improved time slot allocation method for a loop network. Loop networks in which the present invention is applied include a loop-connecting a control station and a number of branch stations. The control and branch stations each have at least one terminal connected thereto such that interstation communication, when demanded by a terminal, is made by passing a frame through the transmission path. The frame includes a synchronization area for indicating the leading end of the frame, a fixed-length control area, and a data area composed of a plurality of time slots. According to the invention, the control and branch stations are each allocated with a predetermined or unique number of time slots to be used by terminals for interstation communication. When a station has its reserve of unused time slots fall below a preset lower limit, the control station supplements time slots from its own reserve. On the other hand, if a station has its reserve exceed a preset upper limit, the station returns the excess time slots to the control station. Thus, wait times for a communication demand before a line connection is established are reduced, with enhanced control station response. Also, efficiency of time slot use is enhanced, with a considerable reduction in call losses.
    • 用于环路网络的改进的时隙分配方法。 应用本发明的环路网络包括环路连接控制站和多个分支站。 控制站和分支站各自具有至少一个连接到其上的终端,使得当由终端请求时,通过使帧通过传输路径来进行站间通信。 帧包括用于指示帧的前端的同步区,固定长度的控制区和由多个时隙组成的数据区。 根据本发明,控制站和分支站各被分配有预定或唯一数量的时隙,以由终端用于站间通信。 当车站的未使用时隙的储备量低于预设下限时,控制站从其自己的储备中补充时隙。 另一方面,如果站的预留超过预设的上限,则站返回到控制站的超时隙。 因此,在建立线路连接之前的通信需求的等待时间减少,具有增强的控制站响应。 此外,增强了时隙使用的效率,大大减少了呼叫损失。