Telecommunications – Transmitter and receiver at separate stations – Single message via plural carrier wave transmission
Patent
1995-09-05
1996-11-12
Faile, Andrew
Telecommunications
Transmitter and receiver at separate stations
Single message via plural carrier wave transmission
455 511, 455 383, 455 331, H04B 726
Patent
active
055749755
ABSTRACT:
Transmitters (18) in a two-way radio communication system (10) transmit location inquiries to subscribing pagers (14), each transmission occurring at a given power output level. Each pager (14) is capable of responding with an acknowledgment signal identifying a particular transmitter whose signal was captured. Messages are sent to those pagers which respond with proper acknowledgments. To locate a pager which failed to acknowledge receipt of a signal from a particular transmitter, the power output level of at least one transmitter, and preferably a group of transmitters, is changed, and the transmitters re-transmit the location inquiry at the changed power output levels. A similar power-shifting technique is provided for transmitters in a one-way communication system.
REFERENCES:
patent: 5457808 (1995-10-01), Osawa et al.
patent: 5533094 (1996-07-01), Sanmugam
Faile Andrew
Moore John H.
Motorola Inc.
Vu Tuyen Q.
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