发明名称 |
METHOD FOR COMMUNICATING VARIABLE LENGTH MESSAGES BETWEEN A PRIMARY STATION AND REMOTE STATIONS OF A DATA COMMUNICATIONS SYSTEM |
摘要 |
A data communications system is described in which variable length messages are communicated between a general communications controller (GCC) and a plurality of portable and mobile radios. The variable length messages include a bit synchronization field, a message synchronization field and a plurality of channel data blocks for efficiently and reliably handling long strings of data or text. Each channel data block includes an information field, a parity field for error-connecting the information field and a channel state field indicating whether or not the radio channel is busy or free. The GCC is coupled to a cellular arrangement of channel communications modules (CCM's), which each include a radio transmitter and/or radio receiver. The mobile and portable radios communicate with the GCC by way of the CCM's. |
申请公布号 |
DE3473106(D1) |
申请公布日期 |
1988.09.01 |
申请号 |
DE19843473106 |
申请日期 |
1984.06.28 |
申请人 |
MOTOROLA, INC. |
发明人 |
KREBS, JAY;FREEBURG, THOMAS, ARTHUR |
分类号 |
H04W28/06;(IPC1-7):H04J3/06;H04L5/22;H04L13/00;G08B5/22 |
主分类号 |
H04W28/06 |
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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