Source: http://www.google.com/patents/US8068855?ie=ISO-8859-1&dq=5,960,411
Timestamp: 2014-12-21 12:06:37
Document Index: 779216718

Matched Legal Cases: ['Application No. 01924271', 'Application No. 01924271', 'Application No. 01924271', 'Application No. 01924271', 'Application No. 01924271', 'Application No. 07717602', 'Application No. 2007']

Patent US8068855 - Location determination using RF fingerprinting - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA method for determining the location of a mobile unit (MU) in a wireless communication system and presenting it to a remote party. The location of a remote MU is determined by comparing a snapshot of a predefined portion of the radio-frequency (RF) spectrum taken by the MU to a reference database containing...http://www.google.com/patents/US8068855?utm_source=gb-gplus-sharePatent US8068855 - Location determination using RF fingerprintingAdvanced Patent SearchPublication numberUS8068855 B2Publication typeGrantApplication numberUS 12/782,500Publication dateNov 29, 2011Filing dateMay 18, 2010Priority dateSep 22, 1998Also published asEP1273184A1, EP1273184A4, US6393294, US6782265, US7167714, US7725111, US20030008668, US20040259575, US20050037776, US20100227626, WO2001072060A1Publication number12782500, 782500, US 8068855 B2, US 8068855B2, US-B2-8068855, US8068855 B2, US8068855B2InventorsRobert Morris Dressler, David Stevenson Spain, Jr.Original AssigneePolaris Wireless, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (82), Non-Patent Citations (41), Referenced by (13), Classifications (14), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetLocation determination using RF fingerprintingUS 8068855 B2Abstract A method for determining the location of a mobile unit (MU) in a wireless communication system and presenting it to a remote party. The location of a remote MU is determined by comparing a snapshot of a predefined portion of the radio-frequency (RF) spectrum taken by the MU to a reference database containing multiple snapshots taken at various locations. The result of the comparison is used to determine if the MU is at a specific location. The comparison may be made in the MU, or at some other location situated remotely from the MU. In the latter case, sufficient information regarding the captured fingerprint is transmitted from the MU to the remote location. The database may be pre-compiled or generated on-line.
SUMMARY OF THE INVENTION The present invention provides a method for determining the location of a mobile unit (MU) in a wireless communication system and presenting it to a remote party.
DETAILED DESCRIPTION The present invention provides a new method for determining the location estimate of a Mobile Unit (MU) in a wireless communication network.
T. Suzuki, et al., The Moving-body Position Detection Method; Patent Application (Showa 63-195800), August 1988. M. Hellebrandt, et al., Estimating Position and Velocity of Mobiles in a Cellular Radio Network, IEEE Trans. On Vehicular Technology, Vol. 46, No. 1, pp. 65-71, February 1997. I. Gaspard, et al., Position Assignment in Digital Cellular Mobile Radio Networks (e.g. GSM) Derived from Measurements at the Protocol Interface, IEEE Journal, pp. 592-596, March 1997. J. Jimenez, et al., Mobile Location Using Coverage Information: Theoretical Analysis and Results, COST 259 TD(98), April 1999. CONCLUSION In conclusion, it can be seen that this invention has one or more of the following significant improvements over prior art for MU location techniques: (1) it can be implemented without requiring any modifications to the existing wireless network infrastructure, (2) only minor software changes in the MU (typically a cellular phone) are required, and (3) it can be utilized in areas where GPS coverage is either not available or not reliable. This follows because the fingerprints are generated by using portions of the RF spectrum that typically have superior coverage and in-building penetration than GPS signals.
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