Satellite selective call signalling system

Details Satellite selective call signalling system Satellite selective call signalling system

1992-01-17

1993-10-26

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082544, 34082547, 455 381, H04Q 700

Patent

active

052570193

ABSTRACT:
A signalling system provides for efficient reception of message by a plurality of Earth based selective call receivers such as pagers. The signals are transmitted from satellites in orbit above the Earth. Each satellite includes a multiple lobe antenna capable of transmitting messages to a selected portion of the surface of the Earth. Methods for conserving satellite transmission power in the communication of message information are described. Furthermore, a signalling protocol transmitted by the satellite provides for power conservation by Earth based selective call receivers. Additionally, a method enabling an area of the Earth to receive messages from multiple satellites is described.

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