Paging system capable of calling pagers of different bit rates w

Details Paging system capable of calling pagers of different bit rates w Paging system capable of calling pagers of different bit rates w

1996-05-17

1998-07-14

Hsu, Alpus H.

Multiplex communications

Communication over free space

Message addressed to multiple destinations

370313, 370328, 370350, 370512, 34082544, 455 312, 455426, 455524, H04B 726, H04L 700

Patent

active

057815399

ABSTRACT:
A central station and each base station have a timer indicating time instants coincident with each other. A common transmission start time instant is provided from the central station to each base station so as to match the transmission start time instant to start transmission of the signal frame in each station. The central station makes the call requests of different bit rates contained in one signal frame and broadcasts to each station the transmission start time instant for the signal frame, the order of the call requests within the signal frame, and bit rate switch timings. When the transmission start time instant arrives, the base station reproduces call signals from the call requests in accordance with the designated order. Reproducing clock pulses are switched with reference to the bit rate switch timings sent from the central station. Thus, each station can transmit the call signals of the different bit rates in one signal frame with their phases coincident with each other.

REFERENCES:
patent: 5363377 (1994-11-01), Sharpe
patent: 5448570 (1995-09-01), Toda et al.
patent: 5495233 (1996-02-01), Kawashima et al.
patent: 5663715 (1997-09-01), Godoroia

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