发明名称 |
Decentralized data transmission system |
摘要 |
Described is a decentralized data transmission system and a method of operating the system. A relatively high speed transmission medium connects a number of relatively lower speed terminals in a loop or similar configuration. A central or monitoring station is connected in the transmission medium which includes a memory table containing the listing of the station addresses connected to the transmission loop. The monitoring station operates as a control station for transmitting the address of a first station to be enabled to transmit a message. The addressed station recognizes its address and responds either with a message destined for another station or with a signal that no message is to be sent. At the end of a message, an enabled station sends a special character to notify the monitoring station that the next station in the memory table can be addressed to grant usage of the transmission medium.
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申请公布号 |
US4227178(A) |
申请公布日期 |
1980.10.07 |
申请号 |
US19780944453 |
申请日期 |
1978.09.21 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
GERGAUD, CLAUDE J.;GRIMANELLI, ETIENNE;TRACOL, ANDRE G. |
分类号 |
G06F13/00;H04L12/403;H04L12/423;(IPC1-7):H04Q9/00;G06F3/00 |
主分类号 |
G06F13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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