Power saving mobile data communication system using adaptors

Details Power saving mobile data communication system using adaptors Power saving mobile data communication system using adaptors

1995-05-31

1997-10-28

Bost, Dwayne

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379 59, 455 331, 455 383, 455 343, 370311, H04Q 718, H04Q 736

Patent

active

056824173

ABSTRACT:
In a cellular mobile communication system, a first adaptor is connected to a data terminal to convert the output of the modem of the data terminal to a baseband data signal, and determines the absence or presence of the baseband data signal and produces a data absence signal or a data presence signal. A mobile unit is connected to the first adaptor to transmit the baseband data signal or the data absence signal on a voice frequency carrier to one of cellsite base stations, deactivates itself following the transmission of the data absence signal, and reactivates itself in response to the data presence signal. A second adaptor is connected to a mobile telephone switching system for receiving the baseband data signal and the data absence signal. The second adaptor includes an idle flag generator responsive to the data absence signal for generating an idle flag until it receives a baseband data signal. A modem is provided in the second adaptor for modulating the idle flag or baseband data signal on a voice frequency carrier. The mobile telephone switching system is responsive to a dialing signal from the mobile unit for establishing a connection from the base station to the input of the second adaptor and a connection from the output of the second adaptor to a destination terminal via a public switched telephone network to transmit the modulated carrier from the second adaptor.

REFERENCES:
patent: 4654867 (1987-03-01), Labedz et al.
patent: 4903335 (1990-02-01), Shimizu
patent: 4912756 (1990-03-01), Hop
patent: 5237429 (1993-08-01), Zuiss et al.
patent: 5276680 (1994-01-01), Messenger
patent: 5511237 (1996-04-01), Sakaguchi
patent: 5590396 (1996-12-01), Henry

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