Communication device with time assigned duplex operation

Details Communication device with time assigned duplex operation Communication device with time assigned duplex operation

1993-07-06

1995-01-03

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

455 581, 370 84, H04B 156

Patent

active

053792793

ABSTRACT:
The communication device (100) operates in full duplex mode by allowing its transmitter (106) to periodically interrupt transmission to allow for a second communication device (702) to send its request-to-transmit signal. This signal is received by the receiver (108) and coupled to a controller (110). The controller (110) dynamically reduces the rate at which it codes the voice in response to the activity on the channel. The coded signal is then coupled to the transmitter (108) for transmission. A sync and control header is included at the beginning of each transmission to allow the two communication devices (100 and 702) to remain in sync and to be aware of the coding rate each of the communication devices (100 and 702) has employed in its most recent transmission. With the two communication devices (100 and 702) operating at dynamically adjusted voice coding rates, each occupies the channel for a portion of time in each frame commensurate with the information flow, thereby providing for full duplex operation.

REFERENCES:
patent: 4754450 (1988-06-01), Lynk, Jr. et al.
patent: 5001703 (1991-03-01), Johnson et al.
patent: 5091906 (1992-02-01), Reed et al.
patent: 5117423 (1992-05-01), Shepherd et al.
patent: 5231629 (1993-07-01), Kolzin et al.

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