Two-way paging system and apparatus

Details Two-way paging system and apparatus Two-way paging system and apparatus

1995-03-13

1998-01-13

Vo, Nguyen

Telecommunications

Transmitter and receiver at separate stations

455343, 34082544, H04B 726

Patent

active

057089710

ABSTRACT:
Paging systems typically include a network of ground stations or orbiting satellites equipped with transmitters and antennas for transmitting paging messages to small, battery-operated paging receivers that are worn about the person, known as pagers. Conventional pagers are receive-only devices and the network receives no confirmation that paging has been successful. The present invention includes the provision of two-way pagers that contain a transmitter for transmitting an acknowledgment confirming reception of a paging message, and a network of receiving stations able to receive said acknowledgments. The network makes use of advanced phased-array antenna signal processing techniques to render the return link operable with much less transmitter power in the portable unit than employed by the base station.

REFERENCES:
patent: 4891637 (1990-01-01), Siwiak et al.
patent: 4932072 (1990-06-01), Toko
patent: 4951044 (1990-08-01), Nelson et al.
patent: 5561848 (1996-10-01), Minami

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