Method and apparatus for transmitting data over a radio communic

Details Method and apparatus for transmitting data over a radio communic Method and apparatus for transmitting data over a radio communic

1995-10-23

1998-03-31

Ton, Dang

Multiplex communications

Duplex

Communication over free space

370315, 370324, H04J 316

Patent

active

057346437

ABSTRACT:
In a trunked radio data communications system using half-duplex radios, plural data messages are exchanged over a single RF working channel using a technique where a working channel repeater assigned to a data call sends status messages to both the data originating radio and the data receiving radio indicating which radio is currently enabled to transmit a data message over the working channel. Each time the currently enabled radio sends a data message to the working channel repeater, the repeater changes the status message so that the other radio can respond. As a result, data messages can be efficiently and reliably exchanged over the same working channel without collision or having to request and set up a new working channel for each data message.

REFERENCES:
patent: 4599719 (1986-07-01), Breen et al.
patent: 4841521 (1989-06-01), Amada et al.
patent: 4924479 (1990-05-01), Iwao et al.
patent: 5121382 (1992-06-01), Yang et al.
patent: 5365516 (1994-11-01), Jandrell
patent: 5396486 (1995-03-01), Scott
patent: 5533015 (1996-07-01), Makowski et al.

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