Radio telephone system supporting automatic busy and out-of-rang

Details Radio telephone system supporting automatic busy and out-of-rang Radio telephone system supporting automatic busy and out-of-rang

1992-08-25

1994-07-05

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

370 29, 455 541, 455 677, 4551542, H04B 1700

Patent

active

053275780

ABSTRACT:
A radio telephone communication system (200) having a base station (203) including at least one frequency agile time division duplex transceiver (207) for facilitating communication with at lest one radio telephone (100) on the at least one radio frequency channel. The radio telephone (100) scans a plurality of channels capable of being generated by the at least one frequency agile transceiver (207) to find an available channel and provide an indication representing a base station busy status when all the at least one frequency agile transceivers are in use. A base station busy status is indicated when one of a bidirectional time division duplex communication including a base station identification signal is being communicated by the at least one frequency agile transceiver or a unidirectional time division duplex communication including a base station identification signal is being communicated by the at least one frequency agile transceiver (207).

REFERENCES:
patent: 4851820 (1982-07-01), Fernandez
patent: 4873711 (1989-10-01), Roberts et al.
patent: 4882766 (1989-11-01), Akaiwa
patent: 4953198 (1990-08-01), Daly et al.
patent: 5049875 (1991-09-01), DeLuca et al.
patent: 5203013 (1993-04-01), Breeden et al.
MPT 1375 Common Air Interface Specification, May 1989.

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