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1. 发明专利

DE202005021139U1 Wireless node location estimating method for use in radio frequency environment, involves defining search region based on intersection of radio frequency coverage maps corresponding to receivers 未知
公开(公告)号：DE202005021139U1
公开(公告)日：2007-04-12
申请号：DE202005021139
申请日：2005-04-25
申请人： AIRESPACE INC
IPC分类号： H04W64/00
摘要： The method involves collecting signal strength values detected at radio receivers corresponding to signals (57) transmitted by a wireless node (56). A search region is defined based on intersection of radio frequency (RF) coverage maps corresponding to the receivers. The estimated location of the wireless node is computed based on the collected signal strength values and the coverage maps within the defined search region. An independent claim is also included for an apparatus facilitating a location of a wireless node in a radio frequency (RF) environment.

2. 发明专利

DE202005021141U1 未知
公开(公告)号：DE202005021141U1
公开(公告)日：2007-11-22
申请号：DE202005021141
申请日：2005-02-28
申请人： AIRESPACE INC
IPC分类号： G01S11/06 , G01S3/02 , H04B7/26
摘要： A wireless node location mechanism that dynamically adapts to changes to a surrounding physical environment that affect the propagation of radio signals. The wireless node location mechanism assesses radio signals from transmitters associated with a wireless node location infrastructure to adjust one or more parameters used to estimate location of a wireless node. In one implementation, path loss exponents are re-computed based on the signals transmitted between infrastructure radio transceivers. These path loss exponents are used, in one implementation, to compute the distance between a wireless node and a given infrastructure radio transceiver and, ultimately, to determine the location of the wireless node based on triangulation. In one implementation, path loss exponents are computed on demand based on the signals observed between infrastructure radios that detect the wireless node whose location is to be estimated.

3. 发明专利

CA2558394C LOCATION OF WIRELESS NODES USING SIGNAL STRENGTH WEIGHTING METRIC 未知
公开(公告)号：CA2558394C
公开(公告)日：2011-01-04
申请号：CA2558394
申请日：2005-02-28
申请人： AIRESPACE INC
发明人： DIETRICH PAUL F , DAVI GREGG SCOTT , FRIDAY ROBERT J
IPC分类号： G01S5/02 , G01S19/48 , H04W64/00 , H04W80/04
摘要： Methods, apparatuses, and systems directed to a wireless node location mechanism that uses a signal strength weighting metric to improve the accuracy of estimating the location of a wireless node based on signals detected among a plurality of radio transceivers. In certain implementations, the wireless node location mechanism further incorporates 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 present invention 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 of the invention searches for the locations in the model between each pair of radio receivers where their signal strength is different by an observed amount.

4. 发明专利

CA2561979A1 SYNCHRONIZATION OF UPSTREAM AND DOWNSTREAM DATA TRANSFER IN WIRELESS MESH TOPOLOGIES 未知
公开(公告)号：CA2561979A1
公开(公告)日：2005-11-10
申请号：CA2561979
申请日：2005-04-25
申请人： AIRESPACE INC
发明人： DIETRICH PAUL F , PEIRCE KENNETH LEIGH JR
IPC分类号： H04J3/06 , H04L12/28 , H04L12/56
摘要： Methods, apparatuses and systems directed to synchronizing upstream and downstream transmissions across routing nodes in a wireless mesh network. Th e present invention, in one implementation, reduces radio interference between routing nodes in a wireless mesh network. In one implementation, the present invention, also allows for the use of a single radio dedicated to wireless backbone transmissions thereby reducing the cost of routing nodes. In one implementation, at least some of the routing nodes in the wireless mesh network include a second radio and associated wireless communication functionality to provide wireless access to mobile stations.

5. 发明专利

CA2555614C WIRELESS NODE LOCATION MECHANISM USING ANTENNA PATTERN DIVERSITY TO ENHANCE ACCURACY OF LOCATION ESTIMATES 未知
公开(公告)号：CA2555614C
公开(公告)日：2011-05-03
申请号：CA2555614
申请日：2005-02-18
申请人： AIRESPACE INC
发明人： FRIDAY ROBERT J , DIETRICH PAUL F
IPC分类号： G01S5/04 , G01S5/02 , H04B7/08 , H04B7/185 , H04B17/00 , H04W64/00
摘要： A wireless node RF Fingerprinting location mechanism that uses multiple antenna patterns to enhance the accuracy of wireless node location in an RF environment. In one implementation, substantially non-overlapping antenna pattern diversity is used to provide a degree of sectorization in computing the estimated location of a wireless node.

6. 发明专利

DE202005021259U1 Wireless node location estimating method, involves collecting signal strength values at radio receivers, and computing estimated location of wireless node based on collected signal strength values and RF coverage maps 未知
公开(公告)号：DE202005021259U1
公开(公告)日：2007-06-28
申请号：DE202005021259
申请日：2005-02-28
申请人： AIRESPACE INC
IPC分类号： H04W64/00
摘要： The method involves collecting a signal strength values detected at the radio receivers corresponding to signals transmitted by a wireless node, and computing the location of the wireless node based on the collected signal strength values and the RF coverage maps of radio receivers. The detected signal strength value is weighted with a weighting function that varies with the signal strength values of the radio receivers. Independent claims are also included for the following: (A) an apparatus facilitating the location of a wireless node in a RF environment, comprising radio receivers to detect the strength of signals transmitted by wireless nodes (B) a wireless node location mechanism operating in association with a wireless network environment.

7. 发明专利

CA2558442A1 WIRELESS NODE LOCATION MECHANISM RESPONSIVE TO OBSERVED PROPAGATION CHARACTERISTICS OF WIRELESS NETWORK INFRASTRUCTURE SIGNALS 未知
公开(公告)号：CA2558442A1
公开(公告)日：2005-10-06
申请号：CA2558442
申请日：2005-02-28
申请人： AIRESPACE INC
发明人： DAVI GREGG SCOTT , DIETRICH PAUL F , HILLS ALEXANDER H
IPC分类号： G01S3/02
摘要： A wireless node location mechanism that dynamically adapts to changes to a surrounding physical environment that affect the propagation of radio signals. The wireless node location mechanism assesses radio signals from transmitters associated with a wireless node location infrastructure to adjust one or more parameters used to estimate location of a wireless node. In one implementation, path loss exponents are re-computed based on the signals transmitted between infrastructure radio transceivers. These path loss exponents are used, in one implementation, to compute the distance between a wireless node and a given infrastructure radio transceiver and, ultimately, to determine the location of the wireless node based on triangulation. In one implementation, path loss exponents are computed on demand based on the signals observed between infrastructure radios that detect the wireless node whose location is to be estimated.

8. 发明专利

CA2558394A1 LOCATION OF WIRELESS NODES USING SIGNAL STRENGTH WEIGHTING METRIC 未知
公开(公告)号：CA2558394A1
公开(公告)日：2005-10-06
申请号：CA2558394
申请日：2005-02-28
申请人： AIRESPACE INC
发明人： DAVI GREGG SCOTT , DIETRICH PAUL F , FRIDAY ROBERT J
IPC分类号： G01S19/48 , G01S5/02 , H04W64/00
摘要： Methods, apparatuses, and systems directed to a wireless node location mechanism that uses a signal strength weighting metric to improve the accuracy of estimating the location of a wireless node based on signals detected among a plurality of radio transceivers. In certain implementations, the wireless node location mechanism further incorporates 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 present invention 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 of the invention searches for the locations in the model between each pair of radio receivers where their signal strength is different by an observed amount.

9. 发明专利

CA2555572A1 SELECTIVE TERMINATION OF WIRELESS CONNECTIONS TO REFRESH SIGNAL INFORMATION IN WIRELESS NODE LOCATION INFRASTRUCTURE 未知
公开(公告)号：CA2555572A1
公开(公告)日：2005-09-15
申请号：CA2555572
申请日：2005-02-25
申请人： AIRESPACE INC
发明人： FRIDAY ROBERT J , HILLS ALEXANDER H
IPC分类号： H04W8/00 , H04W64/00 , H04W76/06 , H04W84/12 , H04W88/08
摘要： Methods, apparatuses and systems directed to refreshing signal information i n an infrastructure wireless node location mechanism. The wireless node locati on mechanism selectively terminates connections with wireless clients to refres h signal strength information used to compute an estimated location for the wireless clients. The wireless node location mechanism terminates the connection between a WLAN and a given wireless node, causing in typical WLAN protocol implementations, the mobile station to transmit frames or packets o n all available operating channels in a given band. This allows access points and other WLAN elements, operating on different frequency channels, to detec t frames transmitted by the mobile station and provide refreshed signal streng th information to a wireless node location mechanism.

10. 发明专利

CA2555614A1 WIRELESS NODE LOCATION MECHANISM USING ANTENNA PATTERN DIVERSITY TO ENHANCE ACCURACY OF LOCATION ESTIMATES 未知
公开(公告)号：CA2555614A1
公开(公告)日：2005-09-09
申请号：CA2555614
申请日：2005-02-18
申请人： AIRESPACE INC
发明人： FRIDAY ROBERT J , DIETRICH PAUL F
IPC分类号： G01S5/04 , G01S5/02 , H04B7/08 , H04B7/185 , H04B17/00 , H04Q7/36
摘要： A wireless node RF Fingerprinting location mechanism that uses multiple antenna patterns to enhance the accuracy of wireless node location in an RF environment. In one implementation, substantially non-overlapping antenna pattern diversity is used to provide a degree of sectorization in computing the estimated location of a wireless node.

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