System frame number (SFN) evaluator

Telecommunications – Transmitter – Power control – power supply – or bias voltage supply

Reexamination Certificate

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Details

C455S067110, C455S574000

Reexamination Certificate

active

07734264

ABSTRACT:
An access terminal (102) reacquires a system frame number (SFN) when a difference between a continuous counter elapsed time (220) and a calculated elapsed time (222) exceeds a threshold. The continuous counter elapsed time (220) is generated by a continuous counter (122) remaining active during a sleep state of the access terminal (102) and the calculated elapsed time (222) is based on a SFN derived from a counter value generated by a discontinuous counter (124) that is deactivated during the sleep state. In one aspect, the continuous counter (122) may be clocked by a continuous clock (118) during a sleep mode and the discontinuous counter (124) may be clocked by a faster clock (120) that is deactivated during the sleep mode. During reactivation after the sleep mode, the discontinuous counter (120) is set, at the counter set time, to a reset counter value (126) corresponding to an SFN indicated by the continuous counter (122).

REFERENCES:
patent: 6088602 (2000-07-01), Banister
patent: 6625467 (2003-09-01), New et al.
patent: 2006/0182147 (2006-08-01), Sanchez
patent: 2007/0064662 (2007-03-01), Bultan et al.
patent: 2329795 (1999-03-01), None
patent: 9510141 (1995-04-01), None
patent: WO 9810609 (1998-03-01), None
patent: WO 9858460 (1998-12-01), None
patent: 0133870 (2001-05-01), None
International Search Report—PCT/US07/077028, international Search Authority—European Patent Office—Jan. 24, 2008.

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