Quasi-duplex radio system using bi-directional hole extension

Details Quasi-duplex radio system using bi-directional hole extension Quasi-duplex radio system using bi-directional hole extension

1989-12-18

1992-02-25

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 31, 370 32, 455 58, 379 63, H04J 324, H04B 320, H04L 516

Patent

active

050919067

ABSTRACT:
A method for interrupting a radio transmission in a quasi-duplex radio-frequency communication system. The method of the present invention includes the step of transmitting a signal (22), with periodically-occuring holes (24) therein, by a first communicatioin unit (10) to at least a second communication unit (12). The transmitted signal (12) includes an audio information portion (16) and information packets (23). Each information packet (23) specifies the time of occurence of the next hole (24). The second communication unit (12) initiates an interruption of the transmission made by the first communication unit (10) by transmitting an interrupt request signal (31) to the first communication unit (10) at a time specified by an information packet (23) received by the second communication unit (12). When the first communication unit (10) receives the interrupt request signal (31), it processes the interrupt request signal (23) to determine whether it complies with predetermined criteria. If the first communication unit determines that the interrupt request signal complies with the predetermined criteria, it transmits an acknowledgement signal allowing the second communication unit (12) to interrupt the transmission so that the second communication unit (12) may begin transmitting information to be received by at least the first communication unit (10).

REFERENCES:
patent: 4056779 (1977-11-01), Toler
patent: 4672601 (1987-06-01), Ablay
patent: 4949335 (1990-08-01), Moore

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