Synchronized, multitransmitter, single frequency paging system

Details Synchronized, multitransmitter, single frequency paging system Synchronized, multitransmitter, single frequency paging system

1982-12-20

1985-03-19

Bookbinder, Marc E.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

34082521, 3408255, 455 54, 455 57, 455 58, H04B 726

Patent

active

045063842

ABSTRACT:
The invention is a synchronized communication system for effectively transmitting messages to a remote mobile receiver where the system includes a plurality of transmitters operating on a single RF communication channel. The system includes a central wide area transmitter which transmits messages over a wide area. The system also includes a plurality of local transmitters which transmit messages over a local area within the wide area served by the wide area transmitter. The transmitters of the system are coordinated by a synchronization link which allows the central wide area transmitter to be keyed only when the local transmitters are not keyed. Correspondingly the synchronization link only allows the local transmitters to be keyed when the central wide area transmitter is not keyed. Normally the synchronization link keys and dekeys the central wide area transmitter and local transmitters in a normal timing cell pattern. If the central wide area transmitter builds up a backlog of messages, the synchronization link may interrupt the normal timing cell and reduce the backlog by holding the central wide area transmitter keyed for an extended period of time.

REFERENCES:
patent: 2509237 (1950-05-01), Labin et al.
patent: 3743937 (1973-07-01), Saillard
patent: 4056780 (1977-11-01), Faulkner
patent: 4160240 (1979-07-01), Partipilo
"Radio Aids Stanford Medical Center" Communications, Feb. 1979 (pp. 60-61).

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