Adaptive sleep circuit using network timing feedback

Details Adaptive sleep circuit using network timing feedback Adaptive sleep circuit using network timing feedback

1997-03-05

1999-01-05

Hofsass, Jeffery

Communications: electrical

Condition responsive indicating system

Specific condition

340540, 371 51, 371 54, G08B 2100

Patent

active

058567860

ABSTRACT:
A method is disclosed for controlling operation of a battery powered modem to implement power conservation by adaptive modem sleep. The method comprises detecting the presence of a periodic network timing signal and detecting transition of the modem processor to a processing ready condition, wherein received RF signals can be processed. A processor ready signal is generated in response to detection of the processing ready condition and compared in time to occurrence of the network timing signal. A sleep error signal is generated which represents the interval between occurrence of the network timing signal and the processor ready signal. A modem is then directed into a sleep mode for periods of time sufficient to reduce the sleep error signal to be within a predetermined error budget.

REFERENCES:
patent: 5566340 (1996-10-01), Stewart et al.
patent: 5602859 (1997-02-01), Kachi

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