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公开(公告)号：US3643031A
公开(公告)日：1972-02-15
申请号：US3643031D
申请日：1969-09-15
申请人： KOKUSAI DENSHIN DENWA CO LTD , FUJITSU LTD , HIROSHI SASAKI , TATSUO MARUYAMA , HISAO KANZAKI , YASUHIKO SAKAMOTO , NOBUYUKI YASOSHIMA
CPC分类号： H04B7/2123
摘要： A time division multiplexing communication system has a plurality of stations and a switching station. Two of the stations communicate with each other via the switching station by utilizing signals comprising a block having a plurality of words each comprising a plurality of frames which are bursts of a constant time length. Each of the stations comprises channel rearrangement control means for rearranging ground channels to satellite channels and for rearranging satellite channels to ground channels in accordance with informations from an order data channel. Burst synchronism control means connected to the channel rearrangement control means provides the timing of transmission and reception of bursts. Order word controls means connected to the channel rearrangement control means receives command data, provides an order data channel, changes the command data to the format of the order data channel, transmits the format to the other stations and assembles a word from the order data channel information received from the other stations. Command control means is connected to the order word control means, the channel rearrangement control means and the burst synchronism control means and is controlled by a program to discriminate the condition of operation of the channel rearrangement control means, the burst synchronism control means and the order word control means, and supplies thereto command data commanding the means to operate. The order word control means transfers the work assembled from the order data channel received from the other stations to the command control unit when the word is directed to the station. Block synchronism controlling means controls the timing of transmission and reception of the blocks and provides block synchronism for blocks of period TB determined in accordance with the equations nTB > OR = Tl +TP and (n- 1)TB
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2.发明授权
公开(公告)号：US3641274A
公开(公告)日：1972-02-08
申请号：US3641274D
申请日：1969-10-13
CPC分类号： H04J3/0602 , H04B7/2125
摘要： A memory stores a unique word pattern and a predicted receiving time for each burst in a frame in a communication synchronization system of a time division multiple access communication system. A counter counts the timing of a frame. A coincidence detection circuit couples the counter to a receiving time circuit and determines coincidence between the count of the counter and the predicted receiving time stored in the memory and actuates the receiving time circuit when coincidence is detected. A unique word register stores the unique word pattern. A unique word detector having outputs and an input is coupled to the receiving time circuit via the unique word register and determines coincidence between the unique word pattern and the unique word pattern of a received burst. The unique word detector is initiated in operation by a signal from the receiving time circuit. A correcting circuit coupled to the outputs of the unique word detector determines a deviation between the time of reception of the burst and the predicted receiving time and corrects the predicted receiving time in accordance with the deviation.
摘要翻译： 存储器存储时分多址通信系统的通信同步系统中的帧中的每个突发的唯一字模式和预测接收时间。 计数器计数帧的时序。 一致检测电路将计数器耦合到接收时间电路，并且确定计数器计数与存储在存储器中的预测接收时间之间的一致性，并且当检测到符合时致动接收时间电路。 唯一的字寄存器存储唯一的字模式。 具有输出和输入的唯一字检测器经由唯一字寄存器耦合到接收时间电路，并且确定唯一字模式与接收脉冲串的唯一字模式之间的一致性。 通过来自接收时间电路的信号来操作独特的字检测器。 耦合到唯一字检测器的输出的校正电路确定突发的接收时间与预测的接收时间之间的偏差，并根据偏差校正预测的接收时间。
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公开(公告)号：US3644680A
公开(公告)日：1972-02-22
申请号：US3644680D
申请日：1969-09-19
申请人： FUJITSU LTD
发明人： AMANO KITSUTARO , OTA CHUICHI , HASHIMOTO MASAO , KANZAKI HISAO , SAKAMOTO YASUHIKO , YASOSHIMA NOBUYUKI
摘要： A TASI system for satellite use is disclosed in which voice signals from the individual trunks are stored prior to being transmitted and in which TASI control data are transmitted in a frame preceding the frame in which associated speech data are transmitted.
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