System clock synchronization in an ad hoc and infrastructure...

Multiplex communications – Communication over free space – Combining or distributing information via time channels

Reexamination Certificate

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Details

C370S350000

Reexamination Certificate

active

10882918

ABSTRACT:
A method of synchronizing clocks in the stations of ad hoc and infrastructure networks includes providing a time stamp field in a header; reading the header by all stations in a network; extracting the time stamp information from the header by each station in the network as time information; sending extracted time information to a station clock; and adjusting the station clock as a function of the extracted time information. A system for synchronizing clocks in the stations of ad hoc and infrastructure networks includes a DLL having a comparator for receiving the time stamp information and a low-pass filter having a long time-constant for adjusting the station clock in a gradual manner; a time stamp field in a header; and time information extracted from the time stamp information of the header by each station in the network.

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patent: 2002/0131398 (2002-09-01), Taylor
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patent: 2004/0005902 (2004-01-01), Belcea
patent: 2004/0008661 (2004-01-01), Myles et al.
patent: WO 2003073304 (2003-09-01), None

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