Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2008-10-06
2011-12-06
Gary, Erika (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S423000
Reexamination Certificate
active
08073463
ABSTRACT:
A system and method for estimating a location of a wireless device in a wireless communication system having a plurality of nodes and a plurality of location measurement units (“LMUs”). A set of signal samples from a first wireless device and a second wireless device may be collected by one or more LMUs in a search window. A first time of arrival (“TOA”) is determined, and a second search window is estimated as a function of the first TOA. A second TOA may be determined within the second search window at a second node or one of the LMUs from the set of signal samples. A range estimate of the wireless device may then be determined, and an estimated location of the wireless device may be determined as a function of the first uplink TOA, the second uplink TOA, or the range estimate and second TOA.
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Al-Mufti Khalid
Carlson John
Hannan Ariful
Islam Tariqul
Andrew LLC
Duane Morris LLP
Gary Erika
LandOfFree
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