Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2011-04-05
2011-04-05
Urban, Edward (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C370S350000, C709S248000
Reexamination Certificate
active
07920881
ABSTRACT:
A method of clock synchronization for a wireless communications system includes receiving a radio frequency (RF) signal at a base station and at a network reference server (NRS). The NRS is also coupled to receive a reference clock signal. A clock offset value is then calculated in response to the RF signal received at the base station, the RF signal received at the NRS, and the reference clock signal. A local clock signal at the base station is then synchronized with the reference clock signal in response to the calculated clock offset value.
REFERENCES:
patent: 6847826 (2005-01-01), Wesby et al.
patent: 2003/0084190 (2003-05-01), Kimball
patent: 2006/0064725 (2006-03-01), Rabinowitz et al.
patent: 2007/0053340 (2007-03-01), Guilford
International Search Report and Written Opinion of the International Searching Authority, PCT/US08/06196 filed May 14, 2008, mailed Jul. 23, 2008.
Matthew Rabinowitz et al., “A New Positioning System Using Television Synchronization Signals,” Rosum Corporation. May 15, 2007 <http://www.rosum.com/rosum—whitepapers.html>.
2Wire, Inc.
Alam Fayyaz
Blakely , Sokoloff, Taylor & Zafman LLP
Urban Edward
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