Telecommunications – Transmitter and receiver at separate stations
Patent
1993-04-27
1995-06-27
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
455 581, 455 62, 455 671, H04Q 700
Patent
active
054288193
ABSTRACT:
An etiquette controller (112) in a transmitter (14) in a first radio frequency (RF) communications system (10) enables radio frequency communications in a frequency bandwidth shared with heterogeneous RF communication systems (15). The etiquette controller (112) monitors the first RF signals in an isochronous frequency channel in a sub-band of the shared frequency bandwidth to determine whether (124) a frequency channel is free or whether (130, 136) the frequency channel comprises a communication channel which is free. In addition, the etiquette controller (112) causes the RF transceiver (102) to transmit (148) a channel relinquishment signal, monitors (150) the isochronous frequency channel for a predetermined monitoring time, and determines (152) whether the isochronous frequency channel is then free for the channel access.
REFERENCES:
patent: 5040238 (1991-08-01), Comroe et al.
patent: 5095529 (1992-03-01), Comroe et al.
patent: 5125103 (1992-06-01), Grube et al.
patent: 5247701 (1993-09-01), Comroe et al.
Bernhardt Richard C.
D'Amico Thomas V.
Wang Zhonghe
Eisenzopf Reinhard J.
Floam D. Andrew
Motorola Inc.
Rasor Gregg E.
Vo Nguyen
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