CA2441512A1 - Location system and methods - Google Patents

Location system and methods Download PDF

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Publication number
CA2441512A1
CA2441512A1 CA002441512A CA2441512A CA2441512A1 CA 2441512 A1 CA2441512 A1 CA 2441512A1 CA 002441512 A CA002441512 A CA 002441512A CA 2441512 A CA2441512 A CA 2441512A CA 2441512 A1 CA2441512 A1 CA 2441512A1
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Canada
Prior art keywords
location
signal
identifier
location system
object identifier
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Granted
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CA002441512A
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French (fr)
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CA2441512C (en
Inventor
Michael K. Dempsey
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Consortium P Inc
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Individual
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Classifications

    • 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
    • G01S5/16—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using electromagnetic waves other than radio waves
    • 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
    • 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
    • G01S5/02522—The radio-map containing measured values of non-radio values
    • 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
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • 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
    • 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
    • G01S2205/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S2205/01—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations specially adapted for specific applications
    • G01S2205/09—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations specially adapted for specific applications for tracking people
    • G01S2205/10—Elderly or infirm
    • 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
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0081—Transmission between base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • 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
    • 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
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • 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
    • 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
    • Y10S707/99941—Database schema or data structure
    • Y10S707/99943—Generating database or data structure, e.g. via user interface

Abstract

In one embodiment of the invention, a location system (720) is provided usin g both RF and IR signals for the determination of an object. Another embodimen t of the invention provides a direct network connection (400) for a receiver. The direct connection may be provided for connection to an Ethernet network, a telephone network, a cable TV network, a UTP network, a Universal Serial Bus (USB), a medical telemetry network or the Internet. A web server is optional ly provided according to an embodiment of the invention. According to a further embodiment, a fixed location identifier (1000) is provided to receive signal from a transmitter and then transmit a signal to a receiver, which may be connected to a network. According to a further embodiment, two identifiers m ay be transmitted, one identifier corresponding to an object, while a second identifier identifies a group designator of the object.

Claims (118)

1. A location system, comprising:
a first object identifier adapted to transmit an RF signal and an IR signal;
and a location determining module suitable for using said IR signal and said RF
signal to determine a location of at least one of the group of said first object identifier and the location determining module.
2. The location system of claim 1, wherein said location determining module comprises a receiver adapted to receive both said RF signal and said IR
signal.
3. The location system of claim 1, wherein said location determining module comprises a transmitter.
4. The location system of claim 1, wherein said location determining module comprises am electronic device.
5. The location system of claim 1, wherein said location determining module comprises a network.
6. The location system of claim 1, wherein said location determining module comprises a database.
7. The location system of claim 1, wherein said location determining module comprises a network connection element.
8. The location system of claim 1, wherein said location determining module comprises a fixed location identifier.
9. The location system of claim 1, wherein said location determining module comprises a location resolver.
10. The location system of claim 1, wherein said location determining module comprises a fixed location identifier, a network connection element and a location resolver adapted for communication with each other by way of a network.
11. The location system of claim 1, wherein said location determining module is adapted to determine a location of said first object identifier by the use of multilateration.
12. The location system of claim 1, wherein said location determining module is adapted to determine a location of said first object identifier by the use of triangulation.
13. The location system of claim 1, wherein said location determining module is adapted to determine a location of said location determining module by the use of multilateration.
14. The location system of claim 1, wherein said location determining module is adapted to determine a location of said location determining module by the use of triangulation.
15. The location system of claim 1, wherein said location determining module is adapted to initiate an event.
16. The location system of claim 15 wherein said event includes sending information.
17. The location system of claim 1, wherein said object identifier comprises a transmitter.
18. The location system of claim 1, wherein said object identifier comprises a receiver.
19. The location system of claim 1, further comprising an interface adapted to directly couple said location determining module to an Ethernet local area network.
20. The location system of claim 1, further comprising an interface adapted to directly couple said location determining module to a specialized network.
21. The location system of claim 20, wherein said interface is a modem.
22. The location system of claim 20, wherein said interface is a cable TV
modulator.
23. The location system of claim 20, wherein said interface is a UTP network card.
24. The location system of claim 20, wherein said interface is a USB card.
25. The location system of claim 20, wherein said interface is a medical telemetry transmitter.
26. The location system of claim 1, wherein said location determining module further comprises an Ethernet network interface to directly couple said location determining module to an Ethernet network.
27. The location system of claim 1, wherein said location determining module further comprises a web server adapted to provide information to a network.
28. The location system of claim 1, further comprising a second object identifier adapted to transmit a second RF signal and a second IR signal;
wherein said location determining module is adapted to determine a location of said second object identifier.
29. The location system of claim 28, wherein said first object identifier does not retransmit said IR signal and said RF signal and said second object identifier does not retransmit said second IR signal and said second RF signal if said location determining module does not receive said IR signal and said RF signal and said second IR
signal and said second RF signal.
30. The location system of claim 28, wherein said location determining module establishes an association between said first object identifier and said second object identifier.
31. The location system of claim 1, wherein said object identifier is adapted to transmit a first identifier corresponding to said object identifier and a second identifier corresponding to a group designator of said object identifier.
32. The location system of claim 1, wherein said location determining module comprises:
a fixed location identifier, a network connection element and a location resolver adapted for communication with each other by way of a network;
a web server adapted to provide information to a network; and an interface adapted to directly couple said location determining module to an Ethernet local area network.
33. The location system of claim 32, wherein said object identifier is adapted to transmit a first identifier corresponding to said object identifier and a second identifier corresponding to a group designator of said object identifier.
34. A location system, comprising:
a transmitter adapted to transmit a location signal; and a receiver adapted to receive said location signal;
wherein said receiver includes an interface adapted to directly couple said receiver to an Ethernet network; and wherein said location signal is used to determine a location of at least one of the group of said transmitter and said receiver.
35. The location system of claim 34, wherein said receiver further comprises a web server adapted to provide information to a network.
36. The location system of claim 34, wherein said location signal comprises a first identifier corresponding to said transmitter and a second identifier corresponding to a group designator of said transmitter.
37. A location system, comprising:
a transmitter adapted to transmit a location signal;
a receiver adapted to receive said location signal; and wherein said receiver includes a web server adapted to provide information to a network; and wherein said location signal is used to determine a location of at least one of the group of said transmitter and said receiver.
38. The location system of claim 37, wherein said web server provides for an input to said receiver from said Internet.
39. The location system of claim 37, wherein said location signal comprises a first identifier corresponding to said transmitter and a second identifier corresponding to a group designator of said transmitter.
40. A location system, comprising:

a transmitter adapted to transmit a location signal;
a receiver adapted to receive said location signal for the determination of a location of at least one of the group of said transmitter and said receiver;
and an interface adapted to directly couple said receiver to a specialized network.
41. The location system of claim 40, wherein said interface is a modem.
42. The location system of claim 40, wherein said interface is a cable TV
modulator.
43. The location system of claim 40, wherein said interface is a UTP network card.
44. The location system of claim 40, wherein said interface is a USB card interface is a medical telemetry transmitter.
45. The location system of claim 40, wherein said specialized network is a medical telemetry network.
46. The location system of claim 40, wherein said location signal comprises a first identifier corresponding to said transmitter and a second identifier corresponding to a group designator of said transmitter.
47. A location system, comprising:

a transmitter adapted to transmit a first identifier corresponding to said transmitter and a second identifier corresponding to a group designator of said transmitter; and a receiver adapted to receive said first identifier and said second identifier;

wherein said first identifier and said second identifier are used to determine a location of at least one of the group of said transmitter and said receiver.
48. The location system of claim 47, wherein said first identifier is transmitted as an IR signal and said second identifier is transmitted as an RF signal.
49. The location system of claim 47, further comprising a fixed location identifier adapted to receive said first identifier and said second identifier, append a fixed location identifier, and transmit said first identifier, said second identifier and said fixed location identifier to said receiver.
50. A location system, comprising:

an object identifier adapted to transmit a first RF signal and a first IR
signal; and a network connection element adapted to receive said first RF signal and said first IR signal for determining a location of at least one of the group of said object identifier and said network connection element from said first RF signal and said first IR
signal.
51. The location system of claim 50, further comprising a fixed location identifier adapted to receive said first RF signal and said first IR signal from said object identifier, append a fixed location identifier, and transmit a second RF signal and a second IR
signal to said network connection element for the determination of a location of at least one of the group of said object identifier and said network connection element.
52. The location system of claim 51, wherein said object identifier is provided with a receiver.
53. The location system of claim 51, wherein said object identifier and said fixed location identifier are each provided with an input device.
54. The location system of claim 51, wherein said object identifier and said fixed location identifier are each provided with an indicator.
55. The location system of claim 51, wherein at least one of the group of said object identifier and said fixed location identifier transmits a corresponding identifier and a group designator identifier.
56. The location system of claim 51, wherein at least one of the group of said object identifier and said fixed location identifier transmits an RF transmission repetition rate.
57. The location system of claim 51, wherein at least one of the group of said object identifier and said fixed location identifier transmits an IR transmission repetition rate.
58. The location system of claim 51, wherein at least one of the group of said object identifier and said fixed location identifier is provided with an input device and transmits an input device status.
59. The location system of claim 50, further comprising a location resolver, wherein said location resolver comprises a network interface and a controller.
60. The location system of claim 59, wherein said location resolver is adapted to determine a location of said object identifier by the use of multilateration.
61. The location system of claim 59, wherein said location resolver is adapted to determine a location of said object identifier by the use of triangulation.
62. The location system of claim 59, wherein said location resolver is adapted to determine a location of said network connection element by the use of multilateration.
63. The location system of claim 59, wherein said location resolver is adapted to determine a location of said network connection element by the use of triangulation.
64. The location system of claim 59, wherein said location resolver is adapted to initiate an event.
65. The location system of claim 64 wherein said event includes sending information.
66. The location system of claim 59, wherein said location resolver establishes an association between a plurality of said object identifiers.
67. The location system of claim 59, further comprising an electronic device adapted to host said location resolver.
68. The location system of claim 59, wherein said location resolver is adapted to trigger events based on locations of object identifiers.
69. The location system of claim 59, wherein said location resolver further comprises an implementation interface adapted to perform at least one of the group of sending a command and receiving a command.
70. The location system of claim 59, wherein said location resolver further comprises a database interface to enable said location resolver to interact with a database.
71. The location system of claim 59, wherein said location resolver further comprises a web server adapted to provide information to a network.
72. The location system of claim 59, wherein said location resolver determines and maintains associations among a plurality of said object identifiers.
73. The location system of claim 59, wherein said location resolver determines and maintains associations among said object identifier and at least one of the group of said fixed location identifier and said network connection element.
74. The location system of claim 59, wherein said location resolver establishes a privacy status for at least one of the group of said object identifier and said network connection element.
75. The location system of claim 59, wherein said location resolver is adapted to configure at least two of the group of said object identifier, fixed location identifier, and network connection element.
76. The location system of claim 59, wherein said location resolver further comprises a database interface to enable said location resolver to interact with a database.
77. The location system of claim 50, further comprising an interface adapted to directly couple said network connection element to an Ethernet local area network.
78. The location system of claim 50, further comprising an interface adapted to directly couple said network connection element to a specialized network.
79. The location system of claim 78, wherein said interface is a modem.
80. The location system of claim 78, wherein said interface is a cable TV
modulator.
81. The location system of claim 78, wherein said interface is a UTP network card.
82. The location system of claim 78, wherein said interface is a USB card interface is a medical telemetry transmitter.
83. The location system of claim 50, wherein said network connection element further comprises an Ethernet network interface to directly couple said network connection element to an Ethernet network.
84. The location system of claim 50, wherein said network connection element further comprises a web server adapted to provide information to a network.
85. The location system of claim 50, wherein said object identifier further comprises a receiver; and said network connection element further comprises a transmitter.
86. The location system of claim 50, wherein said network connection element further comprises a transmitter.
87. The location system of claim 50, wherein said network connection element further comprises a web server adapted to provide information to a network.
88. The location system of claim 87, wherein said web server is adapted to run a configuration applet, a service applet and a debug applet.
89. The location system of claim 50, wherein said network connection element further comprises a network interface
90. The location system of claim 50, wherein said network connection element further comprises an input device.
91. The location system of claim 50, wherein said network connection element further comprises an indicator.
92. The location system of claim 50, wherein said network connection element is adapted to configure said object identifier, said fixed location identifier and another network connection element.
93. A method of determining location, comprising the steps of:
transmitting a first RF signal from an object identifier;
transmitting a first IR signal from said object identifier;
receiving at least one of said first RF signal and said first IR signal;
determining a location of said object identifier based on receipt of at least one of said first RF signal and said first IR signal.
94. The method of claim 93, further comprising the step of providing a fixed location identifier adapted to receive said first RF signal and said first IR signal and transmit a second RF signal and a second IR signal;
wherein said determining step determines said location based additionally on receipt of at least one of said second RF signal and said second IR signal.
95. The method of claim 93, further comprising the step of providing a network in communication with a network connection element.
96. The method of claim 95, further comprising the step of determining said location of said object identifier by the use of a location resolver in communication with said network.
97. The method of claim 93, further comprising the step of determining said location of said object identifier by the use of a location resolver integral to a network connection element.
98. The location system of claim 93, wherein said first RF signal and said first IR
signal comprise a first identifier corresponding to said object identifier and a second identifier corresponding to a group designator of said object identifier.
99. A method of determining location, comprising the steps of:
transmitting a first RF signal from an object identifier;
transmitting a first IR signal from said object identifier;
receiving at least one of said first RF signal and said first IR signal at a location determining module;
determining a location of said location determining module based on receipt of at least one of said first RF signal and said first IR signal.
100. The method of claim 99, further comprising the step of providing a fixed location identifier adapted to receive said first RF signal and said first IR signal and transmit a second RF signal and a second IR signal;
wherein said determining step determines said location based additionally on receipt of at least one of said second RF signal and said second IR signal.
101. The method of claim 99, further comprising the step of providing a network in communication with a network connection element.
102. The location system of claim 99, wherein said first RF signal and said first IR
signal comprise a first identifier corresponding to said object identifier and a second identifier corresponding to a group designator of said object identifier.
103. A method of determining location, comprising the steps of:
transmitting a first RF signal from an object identifier;
transmitting a first IR signal from said object identifier;
receiving said first RF signal at a network connection element;
receiving said first IR signal at said network connection element; and determining a location of said object identifier by analysis of said first RF
signal and said first IR signal.
104. A method of determining location, comprising the steps of:
transmitting a first RF signal from an object identifier;
transmitting a first IR signal from said object identifier;
receiving said first RF signal at a network connection element;

receiving said first IR signal at said network connection element;
receiving said first RF signal at a fixed location identifier;
receiving said first IR signal at said fixed location identifier;
transmitting a second RF signal from said fixed location identifier;
transmitting a second IR signal from said fixed location identifier; and receiving said second RF signal at said network connection element;
receiving said second IR signal at said network connection element;
determining a location of said object identifier by analysis of said first RF
signal, said first IR signal, said second RF signal and said second IR signal.
105. The method of claim 104, further comprising the step of providing a network in communication with the network connection element.
106. The method of claim 105, wherein said step of determining is performed by a location resolver in communication with said network.
107. The method of claim 104, wherein said step of determining is performed by a location resolver integral to said network connection element.
108. A method of determining location of a transmitter, comprising the steps of:
transmitting a first identifier corresponding to said transmitter;
transmitting a second identifier corresponding to a group designator of said transmitter; and receiving said first identifier and said second identifier at a receiver;

determining a location of at least one of the group of said transmitter and said receiver based on said first identifier and said second identifier.
109. The method of claim 108, further comprising the step of sending information pertaining to said location to a group corresponding to said group designator.
110. The method of claim 108, further comprising the steps of receiving said first identifier and said second identifier at a fixed location identifier;
appending a fixed location identifier to said first identifier and said second identifier; and transmitting a signal comprising said first identifier, said second identifier and said fixed location identifier to said receiver;
wherein said determining step includes determining said location based on said first identifier, said second identifier and said signal.
111. A method of providing location information of an object identifier, comprising the steps of:
obtaining said location information;
receiving a signal from an input device of said object identifier;
preventing dissemination of said location information as requested by said signal.
112. A method of providing location information of an object identifier, comprising the steps of:
obtaining said location information;
receiving a signal from an input device of said object identifier;
enabling dissemination of said location information as requested by said signal.
113. A method of operating a location system, comprising the steps of:
obtaining a signal from an input device of said object identifier;
preventing dissemination of information relating to a location of said object identifier as requested by said signal.
114. A method of operating a location system, comprising the steps of:
obtaining a signal from an input device of said object identifier;
enabling dissemination of information relating to a location of said object identifier as requested by said signal.
115. A method of operating a location system, comprising the steps of:
obtaining a signal from an input device of each of a plurality of object identifiers;
establishing eligibility of information dissemination of information relating to each location of each of said plurality of object identifiers as requested by each of said signals corresponding to each of said object identifiers.
116. The method of claim 115, wherein at least one of said signals is disregarded and said information pertaining to said location of said corresponding object identifier is disseminated.
117. In a location system, said location system including a medium holding computer-executable steps for a method, comprising the steps of:
transmitting a first RF signal from an object identifier;
transmitting a first IR signal from said object identifier;
receiving said first RF signal at a network connection element;
receiving said first IR signal at said network connection element; and determining a location of at least one of the group of said object identifier and said network connection element by analysis of said first RF signal and said first IR
signal.
118. In a location system, said location system including a medium holding computer-executable steps for a method, comprising the steps of:
transmitting a first RF signal from an object identifier;
transmitting a first IR signal from said object identifier;
receiving said first RF signal at a network connection element;
receiving said first IR signal at said network connection element;
receiving said first RF signal at a fixed location identifier;
receiving said first IR signal at said fixed location identifier;
transmitting a second RF signal from said fixed location identifier;
transmitting a second IR signal from said fixed location identifier; and determining a location of at least one of the group of said object identifier and said network connection element by analysis of said first RF signal, said first IR signal, said second RF signal and said second IR signal.
CA2441512A 2001-03-09 2002-03-11 Location system and methods Expired - Lifetime CA2441512C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US27454401P 2001-03-09 2001-03-09
US60/274,544 2001-03-09
PCT/US2002/007329 WO2002073828A1 (en) 2001-03-09 2002-03-11 Location system and methods

Publications (2)

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CA2441512A1 true CA2441512A1 (en) 2002-09-19
CA2441512C CA2441512C (en) 2010-06-29

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CA002439002A Expired - Lifetime CA2439002C (en) 2001-03-09 2002-03-11 A system and method for performing object association using a location tracking system
CA2441512A Expired - Lifetime CA2441512C (en) 2001-03-09 2002-03-11 Location system and methods
CA002439005A Abandoned CA2439005A1 (en) 2001-03-09 2002-03-11 A system and method for performing object association at a tradeshow using a location tracking system

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CA002439002A Expired - Lifetime CA2439002C (en) 2001-03-09 2002-03-11 A system and method for performing object association using a location tracking system

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US8190730B2 (en) 2012-05-29
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