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    • 51. 发明公开
    • A data transmission system and a terminal management method of the same
    • DatenübertragungssystemundAnschlussgerät-Verwaltungsverfahren
    • EP0917388A1
    • 1999-05-19
    • EP98121141.0
    • 1998-11-11
    • NEC CORPORATION
    • Harada, Shigekazu
    • H04Q11/04
    • H04Q11/0478H04L2012/561H04L2012/5625H04L2012/563H04L2012/5652H04L2012/5672
    • For enabling to obtain automatically a proper identifier of a remote terminal and to assign an identification number to the remote terminal in order to perform communication control of a data transmission system wherein upward communication is performed according to a TDMA system and downward communication is performed according to a TDM system making use of cells having fixed length; a local station of the system comprises: a command-cell generation timer (112) for generating a command-cell generation trigger periodically, a command-cell generating unit (113) for generating a command cell to be downward transmitted every time the command-cell generation trigger is supplied by writing an available identification number therein, a window generation timer (111) for enabling a window signal every time the command-cell generation trigger is supplied for inhibiting transmission of upward cells from the remote terminals whereto identification numbers are assigned, a control-data-cell generating/terminating unit (107) for detecting a newly installed remote terminal by receiving a control data cell during the window signal is enabled, wherein a proper identifier of the newly installed remote terminal is written, and a terminal management unit (109) for assigning the available identification number to the newly installed remote terminal.
    • 为了能够自动获得远程终端的适当标识符并向远程终端分配标识号,以便执行根据TDMA系统执行向上通信的数据传输系统的通信控制,并且根据 使用具有固定长度的小区的TDM系统; 该系统的本地站包括:用于周期性地生成命令单元生成触发的命令单元生成定时器(112),用于每当命令单元产生定时器(112)生成命令单元生成单元(113) 通过在其中写入可用的识别号码来提供小区生成触发器,每当提供命令单元生成触发用于禁止从分配了识别号码的远程终端发送向上信元时,启用窗口信号的窗口生成定时器(111) ,启用在窗口信号期间通过接收控制数据单元来检测新安装的远程终端的控制数据单元生成/终止单元(107),其中写入新安装的远程终端的适当标识符,并且终端 管理单元(109),用于将可用的标识号分配给新安装的远程终端。