Synchronization establishment circuit and synchronization...

Details Synchronization establishment circuit and synchronization... Synchronization establishment circuit and synchronization...

Filed on

2004-09-21

Date issued

2009-02-03

Examiner

Payne, David C (Department: 2611)

Patent Class

Pulse or digital communications

SubClass

Synchronizers

Other Related Categories

C375S355000, C455S502000, C327S141000

Type

Reexamination Certificate

Status

active

Patent number

07486753

Description

ABSTRACT:
A terminal is wirelessly connected to a base station. The terminal has a timer and a controller. The timer has a register for storing a beacon interval as a comparison value. The timer also includes a beacon counter for counting timer clocks. The timer also includes a comparator for generating an interrupt signal when an output value of the register and a count value of the counter match. The controller causes the counter to start counting when it receives a beacon for the first time. The controller causes the register to store the count value of the beacon counter when it receives a beacon next time. Since the beacon interval is measured using the timer clock in the terminal, instead of using the beacon interval information included in the beacon, it is unnecessary to strictly match the clock precision of the base station and the terminal, and therefore the cost of the system decreases.

REFERENCES:
patent: 5596582 (1997-01-01), Sato et al.
patent: 5694392 (1997-12-01), Gaglione et al.
patent: 5809220 (1998-09-01), Morrison et al.
patent: 6154468 (2000-11-01), Lin et al.
patent: 2002/0181459 (2002-12-01), Ohta et al.
patent: 2003-60652 (2003-02-01), None

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