System and method for asset location in wireless networks

Details System and method for asset location in wireless networks System and method for asset location in wireless networks

2008-05-13

2008-05-13

Eng, George (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S456300, C455S456500, C455S456600, C455S115100

Reexamination Certificate

active

07373154

ABSTRACT:
A computing arrangement for determining a location of a wireless communications device includes a memory arrangement, a communication arrangement and a processor. The memory arrangement stores a location of each of at least three access points. The communication arrangement receives first data which includes at least one of first signal strength data and second signal strength data. The first signal strength data is indicative of a strength of a first signal transmitted by the device and received by the at least three access points. The second signal strength data is indicative of a strength of a second signal transmitted by the at least three access points and received by the device. The processor determines a location area of the device as a function of the first data and the location of each of the at least three access points, the location area being within a predetermined reception range of the at least three access points. The processor determines the location of the device within the location area as a function of second data. The second data is indicative of a travel time of a third signal from the device to each of the at least three access points.

REFERENCES:
patent: 7174172 (2007-02-01), Sharony et al.
patent: 2004/0162084 (2004-08-01), Wang
patent: 2005/0037775 (2005-02-01), Moeglein et al.
patent: 2006/0009240 (2006-01-01), Katz

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