US20110035420A1 - Location Beacon Database - Google Patents
Location Beacon Database Download PDFInfo
- Publication number
- US20110035420A1 US20110035420A1 US12/906,338 US90633810A US2011035420A1 US 20110035420 A1 US20110035420 A1 US 20110035420A1 US 90633810 A US90633810 A US 90633810A US 2011035420 A1 US2011035420 A1 US 2011035420A1
- Authority
- US
- United States
- Prior art keywords
- location
- access point
- access points
- data
- scanning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/45—Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement
- G01S19/46—Determining position by combining measurements of signals from the satellite radio beacon positioning system with a supplementary measurement the supplementary measurement being of a radio-wave signal type
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0205—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0205—Details
- G01S5/021—Calibration, monitoring or correction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0205—Details
- G01S5/0226—Transmitters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0205—Details
- G01S5/0242—Determining the position of transmitters to be subsequently used in positioning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0284—Relative positioning
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/08—Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
- G06Q10/087—Inventory or stock management, e.g. order filling, procurement or balancing against orders
- G06Q10/0875—Itemisation or classification of parts, supplies or services, e.g. bill of materials
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/029—Location-based management or tracking services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0252—Radio frequency fingerprinting
- G01S5/02521—Radio frequency fingerprinting using a radio-map
- G01S5/02524—Creating or updating the radio-map
- G01S5/02525—Gathering the radio frequency fingerprints
- G01S5/02526—Gathering the radio frequency fingerprints using non-dedicated equipment, e.g. user equipment or crowd-sourcing
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/20—Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99931—Database or file accessing
- Y10S707/99933—Query processing, i.e. searching
- Y10S707/99936—Pattern matching access
Definitions
- a proprietary hardware chip receives TV signals from these various towers and uses the known positions of these towers as reference points.
- the challenges facing this model are the cost of the new hardware receiver and the limitations of using such a small set of reference points. For example, if a user is outside the perimeter of towers, the system has a difficult time providing reasonable accuracy.
- the classic example is a user along the shoreline. Since there are no TV towers out in the ocean, there is no way to provide reference symmetry among the reference points resulting in a calculated positioning well inland of the user.
- Performance and reliability of the underlying positioning system are the key drivers to the successful deployment of any location based service. Performance refers to the accuracy levels that the system achieves for that given use case. Reliability refers to the percentage of time that the desired performance levels are achieved.
- the calculated locations for the identified Wi-Fi access points are filtered to determine if the corresponding Wi-Fi access points have moved since the time the information about the Wi-Fi access points was included in the reference database.
- the choice of location-determination algorithm is further based on the user application making the location request.
- FIG. 3 depicts an example of a scanning scenario to illustrate the problem of arterial bias in data collection
- FIG. 5 depicts an example scenario to illustrate the problem of lack of reference symmetry of Wi-Fi access points in locating a user device
- the Location Calculation component uses the reference data from the access point database and the signal strength readings from the Scanner to compute the location of the device at that moment. Before that location data is sent back to the Locator, it is processed by the Smoothing engine [ 909 ] which averages a past series of location readings to remove any erratic readings from the previous calculation. The adjusted location data is then sent back to the Locator.
- the Parser and Filter process [ 803 ] begins.
- the Parser and Filter process reads all of the upload scanning data and loads it up into the appropriate tables of the database. During this exercise the data is evaluated for quality issues. In some cases the GPS receiver may record erroneous or error records for some period of time, which could negatively affect the final access point location calculation.
- the parser and filter process identifies these bad records and either corrects them or removes them from the system.
- the filtering process users clustering techniques to weed out error prone GPS readings.
- the triangulated position is found by applying the algorithm as follows:
- the Data Pack Builder [ 805 ] creates subsets of the database based on regions of the country or world.
- the pack builder facilitates distribution of the database for a variety of use cases in which only region certain geographies are of interest.
- the pack builder is configured with region coordinates representing countries, time zones and metropolitan areas. Utilizing this technique a user can download just the location data for the west coast of the United States. The pack builder segments the data records and then compresses them.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/906,338 US20110035420A1 (en) | 2004-10-29 | 2010-10-18 | Location Beacon Database |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US62310804P | 2004-10-29 | 2004-10-29 | |
US11/261,988 US7305245B2 (en) | 2004-10-29 | 2005-10-28 | Location-based services that choose location algorithms based on number of detected access points within range of user device |
US11/950,242 US7818017B2 (en) | 2004-10-29 | 2007-12-04 | Location-based services that choose location algorithms based on number of detected wireless signal stations within range of user device |
US12/906,338 US20110035420A1 (en) | 2004-10-29 | 2010-10-18 | Location Beacon Database |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/950,242 Division US7818017B2 (en) | 2004-10-29 | 2007-12-04 | Location-based services that choose location algorithms based on number of detected wireless signal stations within range of user device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110035420A1 true US20110035420A1 (en) | 2011-02-10 |
Family
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Family Applications (14)
Application Number | Title | Priority Date | Filing Date |
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US11/261,898 Active 2026-09-30 US7414988B2 (en) | 2004-10-29 | 2005-10-28 | Server for updating location beacon database |
US11/261,848 Active 2026-12-06 US7433694B2 (en) | 2004-10-29 | 2005-10-28 | Location beacon database |
US11/261,988 Active 2026-07-29 US7305245B2 (en) | 2004-10-29 | 2005-10-28 | Location-based services that choose location algorithms based on number of detected access points within range of user device |
US11/261,987 Active 2026-09-30 US7403762B2 (en) | 2004-10-29 | 2005-10-28 | Method and system for building a location beacon database |
US11/950,242 Active 2026-10-19 US7818017B2 (en) | 2004-10-29 | 2007-12-04 | Location-based services that choose location algorithms based on number of detected wireless signal stations within range of user device |
US11/950,178 Active 2026-10-26 US7769396B2 (en) | 2004-10-29 | 2007-12-04 | Location-based services that choose location algorithms based on number of detected access points within range of user device |
US12/190,683 Active 2026-04-30 US8031657B2 (en) | 2004-10-29 | 2008-08-13 | Server for updating location beacon database |
US12/906,338 Abandoned US20110035420A1 (en) | 2004-10-29 | 2010-10-18 | Location Beacon Database |
US12/907,825 Active 2026-12-28 US8630664B2 (en) | 2004-10-29 | 2010-10-19 | Access point database |
US13/225,848 Active US8837363B2 (en) | 2004-10-29 | 2011-09-06 | Server for updating location beacon database |
US13/790,517 Active 2025-12-06 US8965412B2 (en) | 2004-10-29 | 2013-03-08 | Location-based services that choose location algorithms based on number of detected access points within range of user device |
US14/456,310 Active US9369884B2 (en) | 2004-10-29 | 2014-08-11 | Techniques for computing location of a mobile device based on observed Wi-Fi access points |
US15/181,057 Active US9554247B2 (en) | 2004-10-29 | 2016-06-13 | Techniques for computing location of a mobile device based on observed Wi-Fi access points |
US15/411,278 Active US9918295B2 (en) | 2004-10-29 | 2017-01-20 | Techniques for computing location of a mobile device using calculated locations of Wi-Fi access points from a reference database |
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US11/261,898 Active 2026-09-30 US7414988B2 (en) | 2004-10-29 | 2005-10-28 | Server for updating location beacon database |
US11/261,848 Active 2026-12-06 US7433694B2 (en) | 2004-10-29 | 2005-10-28 | Location beacon database |
US11/261,988 Active 2026-07-29 US7305245B2 (en) | 2004-10-29 | 2005-10-28 | Location-based services that choose location algorithms based on number of detected access points within range of user device |
US11/261,987 Active 2026-09-30 US7403762B2 (en) | 2004-10-29 | 2005-10-28 | Method and system for building a location beacon database |
US11/950,242 Active 2026-10-19 US7818017B2 (en) | 2004-10-29 | 2007-12-04 | Location-based services that choose location algorithms based on number of detected wireless signal stations within range of user device |
US11/950,178 Active 2026-10-26 US7769396B2 (en) | 2004-10-29 | 2007-12-04 | Location-based services that choose location algorithms based on number of detected access points within range of user device |
US12/190,683 Active 2026-04-30 US8031657B2 (en) | 2004-10-29 | 2008-08-13 | Server for updating location beacon database |
Family Applications After (6)
Application Number | Title | Priority Date | Filing Date |
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US12/907,825 Active 2026-12-28 US8630664B2 (en) | 2004-10-29 | 2010-10-19 | Access point database |
US13/225,848 Active US8837363B2 (en) | 2004-10-29 | 2011-09-06 | Server for updating location beacon database |
US13/790,517 Active 2025-12-06 US8965412B2 (en) | 2004-10-29 | 2013-03-08 | Location-based services that choose location algorithms based on number of detected access points within range of user device |
US14/456,310 Active US9369884B2 (en) | 2004-10-29 | 2014-08-11 | Techniques for computing location of a mobile device based on observed Wi-Fi access points |
US15/181,057 Active US9554247B2 (en) | 2004-10-29 | 2016-06-13 | Techniques for computing location of a mobile device based on observed Wi-Fi access points |
US15/411,278 Active US9918295B2 (en) | 2004-10-29 | 2017-01-20 | Techniques for computing location of a mobile device using calculated locations of Wi-Fi access points from a reference database |
Country Status (11)
Country | Link |
---|---|
US (14) | US7414988B2 (fr) |
EP (2) | EP1820120B1 (fr) |
JP (2) | JP4866361B2 (fr) |
KR (1) | KR101099151B1 (fr) |
CN (2) | CN101980550B (fr) |
AU (1) | AU2005330513B2 (fr) |
CA (1) | CA2585495C (fr) |
ES (1) | ES2391566T3 (fr) |
HK (1) | HK1108037A1 (fr) |
SG (1) | SG157355A1 (fr) |
WO (1) | WO2006110181A2 (fr) |
Cited By (38)
Publication number | Priority date | Publication date | Assignee | Title |
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US20080008118A1 (en) * | 2006-07-07 | 2008-01-10 | Skyhook Wireless, Inc. | System and method of gathering wlan packet samples to improve position estimates of wlan positioning device |
US20090042557A1 (en) * | 2007-02-05 | 2009-02-12 | Wefi, Inc. | System and Method For Mapping Wireless Access Points |
US20090149197A1 (en) * | 2005-02-22 | 2009-06-11 | Skyhook Wireless, Inc. | Continuous data optimization of new access points in positioning systems |
US20090175189A1 (en) * | 2006-05-08 | 2009-07-09 | Skyhook Wireless, Inc. | Calculation of quality of wlan access point characterization for use in a wlan positioning system |
US20090252138A1 (en) * | 2006-05-08 | 2009-10-08 | Skyhook Wireless, Inc. | Estimation of speed and direction of travel in a wlan positioning system using multiple position estimations |
US20090303112A1 (en) * | 2008-06-06 | 2009-12-10 | Skyhook Wireless, Inc. | System and method for refining a wlan-ps estimated location using satellite measurements in a hybrid positioning system |
US20090312036A1 (en) * | 2008-06-16 | 2009-12-17 | Skyhook Wireless, Inc. | Methods and systems for improving the accuracy of expected error estimation in location determinations using a hybrid cellular and wlan positioning system |
US20110012784A1 (en) * | 2009-07-16 | 2011-01-20 | Skyhook Wireless, Inc. | Methods and systems for determining location using a hybrid satellite and wlan positioning system by selecting the best sps measurements |
US20110012780A1 (en) * | 2009-07-16 | 2011-01-20 | Skyhook Wireless, Inc. | Systems and methods for using a satellite positioning system to detect moved wlan access points |
US20110045840A1 (en) * | 2009-08-18 | 2011-02-24 | Skyhook Wireless, Inc. | Method and system for estimating range of mobile device to wireless installation |
US20110058495A1 (en) * | 2006-05-08 | 2011-03-10 | Skyhook Wireless, Inc. | Estimation of Speed and Direction of Travel in a WLAN Positioning System |
US20110074626A1 (en) * | 2009-09-29 | 2011-03-31 | Skyhook Wireless, Inc. | Improvement of the accuracy and performance of a hybrid positioning system |
US20110080318A1 (en) * | 2009-10-02 | 2011-04-07 | Skyhook Wireless, Inc. | Determining A Dilution of Precision Metric Using Two or Three GPS Satellites |
US20110080317A1 (en) * | 2009-10-02 | 2011-04-07 | Skyhook Wireless, Inc. | Method of determining position in a hybrid positioning system using a dilution of precision metric |
US20110080841A1 (en) * | 2006-11-07 | 2011-04-07 | Skyhook Wireless, Inc. | System and Method for Estimating Positioning Error within a WLAN-Based Positioning System |
US20110235532A1 (en) * | 2010-03-24 | 2011-09-29 | Skyhook Wireless, Inc. | System and Method for Resolving Multiple Location Estimate Conflicts in a WLAN-Positioning System |
US20120135729A1 (en) * | 2010-11-30 | 2012-05-31 | Chiou Ta-Gang | Apparatus and Method for Competitor Network Monitoring |
US20120303556A1 (en) * | 2011-05-27 | 2012-11-29 | Microsoft Corporation | Comparison of modeling and inference methods at multiple spatial resolutions |
US8559974B2 (en) | 2010-06-11 | 2013-10-15 | Skyhook Wireless, Inc. | Methods of and systems for measuring beacon stability of wireless access points |
US8565766B2 (en) | 2007-02-05 | 2013-10-22 | Wefi Inc. | Dynamic network connection system and method |
US8606294B2 (en) | 2010-10-05 | 2013-12-10 | Skyhook Wireless, Inc. | Method of and system for estimating temporal demographics of mobile users |
US8644828B2 (en) | 2007-02-05 | 2014-02-04 | Wefi Inc. | Method and system for selecting a wireless network |
US8768315B2 (en) | 2012-09-05 | 2014-07-01 | Motorola Solutions, Inc. | Method and apparatus for identifying a suspect through multiple correlated device identities |
US8866674B2 (en) | 2009-10-16 | 2014-10-21 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Concept of generating experience messages for updating a reference database |
US8890746B2 (en) | 2010-11-03 | 2014-11-18 | Skyhook Wireless, Inc. | Method of and system for increasing the reliability and accuracy of location estimation in a hybrid positioning system |
US8892132B2 (en) | 2012-09-05 | 2014-11-18 | Motorola Solutions, Inc. | Analytic and tracking systems and methods using over-the-air identifiers of mobile devices |
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