Enhanced wireless node location using differential signal...

Details Enhanced wireless node location using differential signal... Enhanced wireless node location using differential signal...

2011-06-21

2011-06-21

Santiago-Cordero, Marivelisse (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S456500, C455S456600

Reexamination Certificate

active

07966021

ABSTRACT:
A wireless node location mechanism that employs a differential signal strength metric to reduce the errors caused by variations in wireless node transmit power, errors in signal strength detection, and/or direction-dependent path loss. As opposed to using the absolute signal strength or power of an RF signal transmitted by a wireless node, implementations of the location mechanism compare the differences between signal strength values detected at various pairs of radio receivers to corresponding differences characterized in a model of the RF environment. One implementation searches for the locations in the model between each pair of radio receivers where their signal strength is different by an observed amount.

REFERENCES:
patent: 4254467 (1981-03-01), Davis et al.
patent: 5028848 (1991-07-01), Bankston et al.
patent: 5327144 (1994-07-01), Stilp et al.
patent: 5375140 (1994-12-01), Bustamante et al.
patent: 5394158 (1995-02-01), Chia
patent: 5396582 (1995-03-01), Kahkoska
patent: 5564079 (1996-10-01), Olsson
patent: 5570412 (1996-10-01), LeBlanc
patent: 5666662 (1997-09-01), Shibuya
patent: 5684860 (1997-11-01), Milani
patent: 5717406 (1998-02-01), Sanderford et al.
patent: 5732354 (1998-03-01), MacDonald
patent: 5945948 (1999-08-01), Buford et al.
patent: 6112095 (2000-08-01), Wax et al.
patent: 6115605 (2000-09-01), Siccardo et al.
patent: 6122514 (2000-09-01), Spaur et al.
patent: 6134338 (2000-10-01), Solberg et al.
patent: 6134448 (2000-10-01), Shoji et al.
patent: 6140964 (2000-10-01), Sugiura et al.
patent: 6167274 (2000-12-01), Smith
patent: 6198935 (2001-03-01), Saha et al.
patent: 6212391 (2001-04-01), Saleh et al.
patent: 6226400 (2001-05-01), Doll
patent: 6236365 (2001-05-01), LeBlanc et al.
patent: 6243811 (2001-06-01), Patel
patent: 6249252 (2001-06-01), Dupray
patent: 6269246 (2001-07-01), Rao et al.
patent: 6272541 (2001-08-01), Cromer et al.
patent: 6275190 (2001-08-01), Sugiura et al.
patent: 6282427 (2001-08-01), Larsson et al.
patent: 6304218 (2001-10-01), Sugiura et al.
patent: 6317599 (2001-11-01), Rappaport et al.
patent: 6317604 (2001-11-01), Kovach et al.
patent: 6386050 (2002-05-01), Yin et al.
patent: 6414634 (2002-07-01), Tekinay
patent: 6415155 (2002-07-01), Koshima et al.
patent: 6441777 (2002-08-01), McDonald
patent: 6456892 (2002-09-01), Dara-Abrams et al.
patent: 6526283 (2003-02-01), Jang
patent: 6556942 (2003-04-01), Smith
patent: 6581000 (2003-06-01), Hills et al.
patent: 6650896 (2003-11-01), Haymes et al.
patent: 6664925 (2003-12-01), Moore et al.
patent: 6674403 (2004-01-01), Gray et al.
patent: 6704352 (2004-03-01), Johnson
patent: 6728782 (2004-04-01), D'Souza et al.
patent: 6754488 (2004-06-01), Won et al.
patent: 6760318 (2004-07-01), Bims
patent: 6766453 (2004-07-01), Nessett et al.
patent: 6788658 (2004-09-01), Bims
patent: 6799047 (2004-09-01), Bahl et al.
patent: 6804394 (2004-10-01), Hsu
patent: 6850946 (2005-02-01), Rappaport et al.
patent: 6925070 (2005-08-01), Proctor
patent: 6990428 (2006-01-01), Kaiser et al.
patent: 7116987 (2006-10-01), Spain et al.
patent: 7116988 (2006-10-01), Dietrich et al.
patent: 7123924 (2006-10-01), Cuffaro
patent: 7433696 (2008-10-01), Dietrich et al.
patent: 7519372 (2009-04-01), MacDonald et al.
patent: 2002/0036569 (2002-03-01), Martin
patent: 2002/0045424 (2002-04-01), Lee
patent: 2002/0102988 (2002-08-01), Myllymaki
patent: 2002/0115445 (2002-08-01), Myllymaki
patent: 2002/0118118 (2002-08-01), Myllymaki et al.
patent: 2002/0154134 (2002-10-01), Matsui
patent: 2002/0168958 (2002-11-01), Ford et al.
patent: 2002/0174335 (2002-11-01), Zhang et al.
patent: 2002/0176366 (2002-11-01), Ayyagari et al.
patent: 2002/0188723 (2002-12-01), Choi
patent: 2003/0023746 (2003-01-01), Loguinov
patent: 2003/0117985 (2003-06-01), Fujii et al.
patent: 2003/0130987 (2003-07-01), Edlund et al.
patent: 2003/0135486 (2003-07-01), Edlund et al.
patent: 2003/0135762 (2003-07-01), Macaulay
patent: 2003/0188006 (2003-10-01), Bard
patent: 2003/0198208 (2003-10-01), Koos, Jr. et al.
patent: 2004/0066757 (2004-04-01), Molteni et al.
patent: 2004/0072577 (2004-04-01), Myllymaki et al.
patent: 2004/0111397 (2004-06-01), Chen et al.
patent: 2004/0151377 (2004-08-01), Boose et al.
patent: 2004/0166878 (2004-08-01), Erskine et al.
patent: 2004/0176108 (2004-09-01), Misikangas
patent: 2004/0186847 (2004-09-01), Rappaport et al.
patent: 2004/0198373 (2004-10-01), Ford et al.
patent: 2004/0198392 (2004-10-01), Harvey et al.
patent: 2004/0203910 (2004-10-01), Hind et al.
patent: 2004/0236547 (2004-11-01), Rappaport et al.
patent: 2004/0259554 (2004-12-01), Rappaport et al.
patent: 2004/0259555 (2004-12-01), Rappaport et al.
patent: 2005/0128139 (2005-06-01), Misikangas et al.
patent: 2005/0131635 (2005-06-01), Myllymaki et al.
patent: 2005/0136944 (2005-06-01), Misikangas et al.
patent: 2005/0185615 (2005-08-01), Zegelin
patent: 0 930 514 (1999-07-01), None
patent: 0 967 816 (1999-12-01), None
patent: 1 018 457 (2000-07-01), None
patent: 1 296 531 (2003-03-01), None
patent: 1 301 055 (2003-04-01), None
patent: 02044929 (1990-02-01), None
patent: WO 97/33386 (1997-09-01), None
patent: WO 98/41048 (1998-09-01), None
patent: WO 99/08909 (1999-02-01), None
patent: WO 02/43425 (2002-05-01), None
patent: WO 02/054813 (2002-07-01), None
patent: WO 03/023443 (2003-03-01), None
“Ekahau Logical Areas-location enabling the Wi-Fi network.” Apr. 4, 2003. Ekahau, Inc., Saratoga, CA. Company's URL: www.ekahau.com.
“Ekahau Positioning Engine 2.0: Product Overview.” Apr. 4, 2003. Ekahau, Inc., Saratoga, CA. URL: http://www.ekahau.com/products/positioningengine/.
“Ekahau Positioning Engine 2.0: Data Sheet.” Apr. 4, 2003. Ekahau, Inc., Saratoga, CA. URL: http://www.ekahau.com/pdf/EPE—2.0—datasheet.PDF.
“Indoor Positioning in 802.11b Networks.” Apr. 4, 2003. Ekahau, Inc., Saratoga, CA. URL: http://www.ekahau.com/products/positioningengine/features.html.
“InFielder.” Apr. 22, 2003. Wireless Valley, Austin, TX. URL: http://www.wirelessvalley.com/Products/InFielder/InFielder.asp.
“LANFielder.” Apr. 22, 2003. Wireless Valley, Austin, TX. URL: http://www.wirelessvalley.com/Products/LANFielder/LANFielder.asp.
“Optimatic.” Apr. 22, 2003. Wireless Valley, Austin, TX. URL: http://www.wirelessvalley.com/Products/Optimatic/Optimatic.asp.
“Predictor.” Apr. 22, 2003. Wireless Valley, Austin, TX. URL: http://www.wirelessvalley.com/Products/Predictor/Predictor.asp.
“LANFielder Product Literature.” Feb. 10, 2004. Wireless Valley, Austin, TX. URL: http://www.wirelessvalley.com/Assets/brochures/LanFielder.pdf.
Conley, C.. “Securing WLANS with Location-Enabled Networks.”Wireless Security Perspectives, vol. 5,No. 3.Mar. 2003. Organization's URL: www.cnp-wireless.com/wsp.html.
“Company Information.” Apr. 6, 2004. Corsair Communications:A LightBridge Company, Burlington, MA. Company's URL: www.lightbridge.com.
“Corporate Fact Sheet.” Aruba Wireless Networks, San Jose, CA. Feb. 10, 2004. URL: http://www.arubanetworks.com/pdf/coporate fact sheet.pdf.
“Airwave Rogue Access Point Detection.” 2002. Airwave Wireless, Inc. San Mateo, CA. URL: http://airwave.com/features.html.
Geier, J. “Identifying Rogue Access Points.” Jan. 6, 2003. Wi-Fi Planet Tutorials. URL: http://www.wi-fiplanet.com/tutorials/article.php/1564431.
Brewin, B. “IBM Develops Tool to Detect Rogue Wireless LAN Access Points.” Jun. 17, 2002. Computerworld, Framingham, MA. URL: http://www.computerworld.com/mobiletopics/mobile/story/0,10801,72065,00.html.
Bulusu, N., Heidemann, J., Estrin, D. “GPS-less Low Cost Outdoor Localization for Very Small Devices.”IEEE Personal Communications, Oct. 2000. URL: http://lecs.cs.ucla.edu/˜bulusu/papers/Bulusu00a.pdf.
“AeroScout WLAN Location System.” Downloaded on Nov. 10, 2003 from http://www.bluesoft-inc.com/wlan.asp Bluesoft, Inc., San Mateo, CA.
“Cognio Announces Breakthrough Location Technology for WLAN Deploymen

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