Precise sleep timer using a low-cost and low-accuracy clock

Details Precise sleep timer using a low-cost and low-accuracy clock Precise sleep timer using a low-cost and low-accuracy clock

2007-03-27

2007-03-27

Anderson, Matthew D. (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S502000, C455S343200

Reexamination Certificate

active

11000285

ABSTRACT:
A wireless transmit/receive unit (WTRU) uses an oscillator providing accuracy for synchronized communications parameters in an active mode, and operates at reduced power during a discontinuous reception (DRX) mode. A real time clock (RTC) is used as the frequency standard during the reduced power operation, and a frequency adjustment is effected while the RTC is used as the frequency standard. By effecting the frequency adjustment, the RTC is able to be used as the frequency standard for substantial time periods, thereby reducing power consumption of the WTRU during the DRX mode.

REFERENCES:
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patent: 6016312 (2000-01-01), Storm et al.
patent: 6029061 (2000-02-01), Kohlschmidt
patent: 6240304 (2001-05-01), Blankenstein et al.
patent: 2003/0153368 (2003-08-01), Bussan et al.
patent: 2003/0153370 (2003-08-01), Sako
patent: 2004/0116110 (2004-06-01), Amerga et al.
patent: 2006/0045215 (2006-03-01), Ballantyne et al.

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