Method and system for collecting locationing information in...

Locks – Special application – For automotive vehicles

Reexamination Certificate

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C370S445000, C370S328000, C370S395210, C370S461000, C370S462000, C370S447000

Reexamination Certificate

active

08033149

ABSTRACT:
A technique is provided for determining estimated location of a wireless communication device (WCD) in a network. A first AP transmits a first RSSI data request message, including a BSSID to the WCD at a first time over a radio channel. The WCD then transmits a first response message to the first AP, which then transmits a first measured RSSI value to a trilateration engine (TE). At a different, second time, a second AP can switch to the radio channel and transmit a second RSSI data request message that includes the BSSID of first AP to the WCD over the radio channel. In response, the WCD transmits a second response message to the second AP, which then transmits a second measured RSSI value to the TE. A third AP performs a similar message exchange. This technique collects RSSI information from the WCD at the APs without disrupting any of their connections.

REFERENCES:
patent: 6907229 (2005-06-01), Shpak
patent: 7065325 (2006-06-01), Zegelin et al.
patent: 7385345 (2008-06-01), Chang
patent: 2009/0102642 (2009-04-01), Huseth et al.
patent: 2009/0197613 (2009-08-01), Wu et al.

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