Paging radio communications system and method

Details Paging radio communications system and method Paging radio communications system and method

1992-09-29

1994-12-20

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 561, 455 571, 455103, 34082544, H04B 100

Patent

active

053752520

ABSTRACT:
A paging radio communications system includes a plurality of radio receivers, a call controller for receiving a call message which requests a connection with at least one of the radio receivers and for generating a selective call signal having a predetermined format in which a preamble signal and a code word are provided, the code word including information specifying the at least one of the radio receivers, and a plurality of radio transmitters coupled to the call controller. Each of the radio transmitters includes a transmitter unit for transmitting a radio wave corresponding to the selective call signal without storing the selective call signal when one of predetermined transmission delay times has elapsed after receipt of the selective call signal, so that a part of the preamble signal and the code word are transferred to the radio receivers, and code words respectively transmitted by the transmitter unit of the radio transmitters are in phase with one another. The preamble signal contained in the selective call signal has a length equal to or longer than a sum of a maximum one of the transmission delay times and a predetermined minimum length of the preamble signal.

REFERENCES:
patent: 4255814 (1981-03-01), Osborn
patent: 4696051 (1987-09-01), Breeden
patent: 5077759 (1991-12-01), Nakahara
patent: 5127101 (1992-06-01), Rose, Jr.

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