Multiplex communications – Diagnostic testing – Determination of communication parameters
Reexamination Certificate
2011-03-29
2011-03-29
Appiah, Charles N (Department: 2617)
Multiplex communications
Diagnostic testing
Determination of communication parameters
C370S338000
Reexamination Certificate
active
07916661
ABSTRACT:
A method for estimating position using WLAN access point radio propagation characteristics in a WLAN location based service is provided. A location-based services system has a plurality of Wi-Fi access points in a target area. The Wi-Fi access points are positioned at geographic locations and have signal coverage areas. A method of characterizing at least one of the Wi-Fi access points comprises determining the geographic location of the Wi-Fi access point, dividing the signal coverage area of the Wi-Fi access point into at least one section, and determining radio propagation characteristics for each section. The radio propagation characteristics of each section characterize a radio channel of the Wi-Fi access point, and the characterization can be used in a location algorithm.
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Alizadeh-Shabdiz Farshid
Pahlavan Kaveh
Appiah Charles N
Doan Kiet
Skyhook Wireless, Inc.
Wilmer Cutler Pickering Hale and Dorr LLP
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