Source: http://www.google.nl/patents/US20110058495
Timestamp: 2017-12-11 15:03:24
Document Index: 33963306

Matched Legal Cases: ['art 2003', 'art 2006', 'art 2003', 'art 2002', 'art 2004', 'art 2007']

Patent US20110058495 - Estimation of Speed and Direction of Travel in a WLAN Positioning System - Google Patenten
A method for estimating the speed and bearing of a Wi-Fi enabled device using WLAN radio signals in a WLAN based location service is provided. A method used to estimate a speed of travel of a Wi-Fi enabled device comprises the Wi-Fi enabled device receiving signals transmitted by Wi-Fi access points...http://www.google.nl/patents/US20110058495?utm_source=gb-gplus-sharePatent US20110058495 - Estimation of Speed and Direction of Travel in a WLAN Positioning System
Publicatienummer US20110058495 A1
Aanvraagnummer US 12/945,266
Aanvraagdatum 12 nov 2010
Ook gepubliceerd als US7835754, US8090386, US8526967, US9008690, US20070259624, US20120100872, US20140160963
Publicatienummer 12945266, 945266, US 2011/0058495 A1, US 2011/058495 A1, US 20110058495 A1, US 20110058495A1, US 2011058495 A1, US 2011058495A1, US-A1-20110058495, US-A1-2011058495, US2011/0058495A1, US2011/058495A1, US20110058495 A1, US20110058495A1, US2011058495 A1, US2011058495A1
Uitvinders Farshid Alizadeh-Shabdiz, Edward J. Morgan, Kaveh Pahlavan
Patentcitaties (98), Verwijzingen naar dit patent (70), Classificaties (9), Juridische gebeurtenissen (2)
US 20110058495 A1
measuring at least one amount of time during which the Wi-Fi enabled device detects signals transmitted by the at least one Wi-Fi access point; and
estimating the speed of travel of the Wi-Fi enabled device based on the at least one amount of time during which signals from the at least one Wi-Fi access points were detected, so that the speed of travel of the Wi-Fi enabled device can be estimated without requiring position estimates of the Wi-Fi enabled device.
V i = Δ   d i Δ   t i = d i - d i - 1 t i - t i - 1 ,  1 ≤ i ≤ n
{ ( d 1 , t 1 ) , ( d 2 , t 2 ) , …  , ( d n , t n ) } ⇒ V avg = d n - d 1 t n - t 1
In order to calculate the average observation period, a time window of W is considered to collect Received Signal Strength samples and calculate average observation period. A total number of access points detected during time window W is m, in which m1 exist in the reference database [104] and m2 do not. If observation period of access point i is denoted by Ci, and the coverage area is denoted by and the nominal average coverage area of all access points in the reference database [104] is denoted by C, the average observation period is calculated as follows:
t _ = ∑ i = 1 m 1  t i C i + ∑ i = 1 m 2  t i C m
d = 2 × R 2 - ( R / 2 ) 2 = 2  R  0.75
V = ∑ i - 1 3  W i  V i
An example method for estimating bearing is as follows. Consider the last m position estimations of the user, and exclude low quality position estimations. The number of acceptable quality position estimations is denoted by M. The direction of movement between the first position estimation and the next M−1 position estimation samples is found; bearing calculation of the first position estimation and position estimation i is denoted by B(1,i), 0<i<(M−1). The method next determines the weighted average of the bearing of M−1 results, weighted according to their quality of estimation. If quality of estimation of location estimation i is denoted by the bearing is calculated as follows:
B = ∑ i = 1 M - 1  B  ( 1 , i )  Q i M - 1
US6097336 * 12 jan 1999 1 aug 2000 Trueposition, Inc. Method for improving the accuracy of a wireless location system
US6978023 * 25 maart 2003 20 dec 2005 Sony Corporation Apparatus and method for location based wireless client authentication
US7020442 * 2 okt 2002 28 maart 2006 Csi Wireless Llc System and method for WLAN signal strength determination
US7305245 * 28 okt 2005 4 dec 2007 Skyhook Wireless, Inc. Location-based services that choose location algorithms based on number of detected access points within range of user device
US7414988 * 28 okt 2005 19 aug 2008 Skyhook Wireless, Inc. Server for updating location beacon database
US7433694 * 28 okt 2005 7 okt 2008 Skyhook Wireless, Inc. Location beacon database
US7471954 * 23 feb 2007 30 dec 2008 Skyhook Wireless, Inc. Methods and systems for estimating a user position in a WLAN positioning system based on user assigned access point locations
US7474646 * 28 nov 2005 6 jan 2009 Hitachi, Ltd. Wireless communication system, node position calculation method and node
US7515548 * 28 sept 2004 7 april 2009 Texas Instruments Incorporated End-point based approach for determining network status in a wireless local area network
US20020147024 * 7 feb 2002 10 okt 2002 Yongbing Wan Power management system for a mobile unit by reduced neighbor cell scanning
US20020167444 * 19 april 2002 14 nov 2002 Lg Electronics, Inc. Apparatus and method for estimating position of mobile communication terminal
US20030054830 * 4 sept 2001 20 maart 2003 Zi Corporation Navigation system for mobile communication devices
US20040110524 * 18 juni 2001 10 juni 2004 Nahoko Takano Mobile communication control method, cellular system, mobile station, base station, and base station control apparatus
US20040162090 * 18 feb 2003 19 aug 2004 Lalitha Suryanarayana Location determination using historical data
US20040166864 * 28 maart 2002 26 aug 2004 Stephen Hill Minimising signal interference within a wireless network
US20040203420 * 10 april 2002 14 okt 2004 Rick Roland R. Method and apparatus for calculating a representative measurement from multiple data measurements
US20050215201 * 25 maart 2004 29 sept 2005 Qiang Cao Radio telecommunications network, and a method of selecting base station antennas for connection with a mobile user terminal
US20050246334 * 30 april 2004 3 nov 2005 Hong Kong Applied Science And Technology Research Institute Co., Ltd. Location determination and location tracking in wireless networks
US20050270236 * 25 juli 2005 8 dec 2005 Microsoft Corporation System and methods for determining the location dynamics of a portable computing device
US20050276276 * 24 sept 2004 15 dec 2005 Mark Davis Wireless probe
US20060025153 * 14 juli 2005 2 feb 2006 Nec Corporation Position information providing system, base station and position information providing method for use therewith
US20060197704 * 21 feb 2006 7 sept 2006 Ariel Luzzatto Measuring distance using wireless communication
US20060256803 * 7 jan 2005 16 nov 2006 Tsuneo Nakata Communication method
US20070077968 * 30 sept 2005 5 april 2007 Alexandr Kuzminskiy Increasing the range of access point cells for a given throughput in a downlink of a wireless local area network
US20070139269 * 16 dec 2005 21 juni 2007 Lucent Technologies Inc. System and method for model-free position estimation and tracking
US20070232892 * 29 maart 2007 4 okt 2007 Terumo Kabushiki Kaisha Image diagnostic system and processing method therefor
US20070259624 * 8 mei 2006 8 nov 2007 Farshid Alizadeh-Shabdiz Estimation of speed and direction of travel in a WLAN positioning system
US8565686 * 30 juni 2011 22 okt 2013 Sprint Communications Company L.P. Power status multipath search window sizing for wireless communications
US20120120816 * 15 nov 2010 17 mei 2012 Qualcomm Innovation Center, Inc. Location and network based mobile device power management
US20130005272 * 30 juni 2011 3 jan 2013 Sprint Communications Company L.P. Power status multipath search window sizing for wireless communications
Internationale classificatie H04L12/26
Coöperatieve classificatie G01S11/02, H04W64/006, G01S11/06, H04W4/02, H04W24/10
Europese classificatie G01S11/06, G01S11/02
17 juni 2015 FPAY Fee payment