Communications localization system

• US 5,959,580 A
• Filed: 11/03/1994
• Issued: 09/28/1999
• Est. Priority Date: 11/03/1994
• Status: Expired due to Term

• Current Assignee: TruePosition Incorporated
• Original Assignee: KSI Inc. (Liberty Broadband Corp.)
• Inventors: Maloney, John E., Stevenson, James O., Hinkle, Charles J. Jr.
• Primary Examiner(s): Blum, Theodore M.
• Application Number:
  US08/335,331
• Time in Patent Office: 1,790 Days
• Field of Search: 342/457, 364/449, 364/438, 364/436, 364/458, 364/460, 701/207
• US Class Current: 342/457
• CPC Class Codes: G01S 2205/06 Emergency
• CPC Class Codes: G01S 5/02 using radio waves using satellite radio beacon systems for determining position G01S19/00
• CPC Class Codes: G01S 5/04 Position of source determined by a plurality of spaced direction-finders
• CPC Class Codes: G01S 5/12 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A method and apparatus for locating a mobile radio communications transceiver in a cellular-telephone or cell-like communications system uses a simplified system for passive monitoring of the signals emitted by the transceiver. A single base station can determine a line of bearing to the remote transceiver. This line of bearing is then combined with collateral, position-sensitive information to determine the likely location of the transceiver. The present invention has particular applicability to roadway transportation in that it facilitates enhanced emergency (9-1-1) services and roadside assistance in response to calls for assistance, and it permits the passive monitoring of traffic flow.

Claims

1. An apparatus for locating a mobile radio communications transceiver in an operating environment served by a wireless communications system, comprising:

at least a single sensor station having a directionally sensitive receiving antenna to receive a radio signal from the mobile transceiver,

a signal characterization processing unit for determining, from the radio signal, at least one directional line of bearing from the single sensor station to the mobile radio transceiver,

a source of collateral information about the operating environment of the mobile transceiver,

a multidimensional parametric correlation processing unit for determining a probable position of the mobile transceiver directly from (1) the line of bearing information from the single sensor station and (2) the collateral information, and

an output indicative of the probable position of the mobile transceiver.

2. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 1, wherein the multidimensional parametric correlation processing unit comprises a means for determining the relative motion of the radio transceiver from the line of bearing signal.

3. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 1, wherein the collateral information comprises databased information.

4. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 3, wherein the databased information comprises topological information.

5. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 4, wherein the topological information comprises map information.

6. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 4, wherein the topological information comprises roadway configuration information.

7. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 6, wherein the roadway configuration information comprises speed limit information.

8. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 4, wherein the topological information comprises information concerning landmarks.

9. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 3, wherein the databased information comprises signal propagation characteristics of the operating environment of the mobile transceiver.

10. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 3, wherein the databased information comprises traffic flow characteristics.

11. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 10, wherein the traffic flow characteristics comprise speed distribution information.

12. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 3, wherein the databased information comprises localized event information.

13. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 3, wherein the databased information comprises descriptions of users of the wireless communication system.

14. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 1, wherein the collateral information comprises communicated information.

15. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 14, wherein the communicated information comprises input from an operator.

16. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 14, wherein the communicated information comprises information on traffic conditions.

17. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 14, wherein the communicated information comprises road identification information.

18. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 1, wherein the collateral information comprises a measured physical characteristic of the radio signal in addition to the line of bearing information.

19. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 18, wherein the additional measured physical characteristic comprises signal strength.

20. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 18, wherein the additional measured physical characteristic comprises two way signal travel time.

21. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 8, wherein the additional measured physical characteristic comprises a time of arrival of the signal from the mobile radio transceiver.

22. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 1, wherein the collateral information comprises information supplied by the wireless communication system.

23. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 22, wherein the information supplied by the wireless communication system comprises signal strength information.

24. An apparatus for locating a mobile radio communications transceiver in a wireless communications system as claimed in claim 1, wherein the sensor station has a transportable configuration.

25. A method for locating a mobile radio communications transceiver operating in an environment served by a cellular communications system, comprising:

measuring at least one line of bearing from at least a single sensor station to the mobile transceiver based on radio emissions from the mobile transceiver,

inputting collateral information related to the operating environment of the mobile transceiver,

correlating a probable position of the mobile transceiver directly from (1) the line of bearing information from the single sensor station and (2) the collateral information, and

indicating a probable position of the mobile transceiver.

26. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 25, wherein the collateral information comprises databased information.

27. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 26, wherein the databased information comprises signal propagation characteristics of the operating environment of the mobile transceiver.

28. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 26, wherein the databased information comprises traffic flow characteristics.

29. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 26, wherein the traffic flow characteristics comprise speed distribution information.

30. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 26, wherein the databased information comprises localized event information.

31. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 26, wherein the databased information comprises descriptions of users of the wireless communication system.

32. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 26, wherein the databased information comprises inputting topological information.

33. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 32, wherein the topological information comprises map information.

34. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 33, wherein the topological information comprises information concerning landmarks.

35. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 32, wherein the topological information comprises roadway configuration information.

36. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 35, wherein the topological information comprises speed limit information.

37. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 25, wherein the collateral information comprises communicated information.

38. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 37, wherein the communicated information comprises input from an operator.

39. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 37, wherein the communicated information comprises information on traffic conditions.

40. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 25, wherein the collateral information comprises a measured physical characteristic of the radio signal in addition to the line of bearing information.

41. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 40, wherein the additional measured physical characteristic comprises signal strength information.

42. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 40, wherein the additional measured physical characteristic comprises two way signal travel time.

43. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 40, wherein the additional measured physical characteristic comprises measuring a time of arrival of the signal from the mobile radio transceiver.

44. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 25, wherein the collateral information comprises information supplied by the wireless communication system.

45. A method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 44, wherein the information supplied by the wireless communication system comprises signal strength information.

46. An method for locating a mobile radio communications transceiver in a cellular communications system as claimed in claim 25, further comprising measuring a plurality of lines of bearing from the sensor station and determining the relative motion of the plurality of lines of bearing.

47. An apparatus for locating a mobile radio transceiver operating in an environment served by a wireless communications system, comprising:

at least a single sensor station,

means for determining at least one line of bearing from the sensor station to the mobile radio communications transceiver, and

means for directly combining (1) the collateral information about the operating environment of the mobile radio transceiver with (2) the line of bearing from the single sensor station to determine the location of the mobile radio transceiver.

48. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 47, wherein the collateral information comprises databased information.

49. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 48, wherein the databased information comprises signal propagation characteristics of the operating environment of the mobile transceiver.

50. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 49, wherein the databased information comprises descriptions of users of the wireless communications system.

51. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 49, wherein the collateral information comprises topological information.

52. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 51, wherein the topological information comprises map information.

53. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 51, wherein the topological information comprises roadway configuration information.

54. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 53, wherein the roadway configuration information comprises speed limit information.

55. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 51, wherein the topological information comprises landmark information.

56. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 48, wherein the databased information comprises traffic flow characteristics.

57. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 48, wherein the traffic flow characteristics comprise speed distribution information.

58. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 48, wherein the databased information comprises localized event information.

59. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 47, wherein the collateral information comprises communicated information.

60. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 59, wherein the communicated information comprises operator input information.

61. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 59, wherein the communicated information comprises information traffic condition information.

62. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 59, wherein the communicated information comprises road identification information.

63. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 47, wherein the collateral information comprises a measured physical characteristic of the radio signal in addition to the line of bearing information.

64. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 63, wherein the collateral information comprises signal strength information.

65. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 63, wherein the additional measured physical characteristic comprises two way signal travel time.

66. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 63, wherein the additional measured physical characteristic comprises a time of arrival of the signal from the mobile radio transceiver.

67. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 47, wherein the collateral information comprises information supplied by the wireless communication system.

68. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 67, wherein the information supplied by the wireless communication system comprises signal strength information.

69. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 47, wherein combining means comprises a means for determining multiple lines of bearing and means for determining any motion of the radio transceiver from the directional signal.

70. An apparatus for locating a mobile radio transceiver in a wireless communications system as claimed in claim 47, wherein the sensor station has a transportable configuration.

71. A method for locating a mobile radio transceiver operating in an environment served by a wireless communications system, comprising:

determining at least one line of bearing to the mobile radio communications transceiver from a single sensor station, and

directly combining (1) collateral information with (2) the line of bearing from the single sensor station to determine the location of the mobile radio transceiver.

72. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 71, wherein the collateral information comprises databased information.

73. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 72, wherein the databased information comprises signal propagation characteristics of the operating environment of the mobile transceiver.

74. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 72, wherein the databased information comprises traffic flow characteristics.

75. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 74, wherein the traffic flow characteristics comprise speed distribution information.

76. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 72, wherein the databased information comprises localized event information.

77. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 72, wherein the databased information comprises descriptions of users of the wireless communication system.

78. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 72, wherein the databased information comprises topological information.

79. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 78, wherein the topological information comprises map information.

80. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 78, wherein the topological information comprises roadway configuration information.

81. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 80, wherein the roadway configuration information comprises speed limit information.

82. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 78, wherein the topological information comprises information concerning landmarks.

83. A method for locating a mobile radio transceiver in a wireless communications system as claimed in claim 71, wherein the collateral information comprises communicated information.

84. A method for locating a mobile radio transceiver in a wireless communications system as claimed in claim 83, wherein the collateral information comprises operator input information.

85. A method for locating a mobile radio transceiver in a wireless communications system as claimed in claim 83, wherein the communicated information comprises traffic condition information.

86. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 71, wherein the collateral information comprises a measured physical characteristic of the radio signal in addition to the line of bearing information.

87. A method for locating a mobile radio transceiver in a wireless communications system as claimed in claim 86, wherein the additional measured physical characteristic of the radio signal comprises signal strength information.

88. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 86, wherein the additional measured physical characteristic comprises two way signal travel time.

89. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 86, wherein the additional measured physical characteristic comprises measuring a time of arrival of the signal from the mobile radio transceiver.

90. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 71, wherein the collateral information comprises information supplied by the wireless communication system.

91. A method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 90, wherein the information supplied by the wireless communication system comprises signal strength information.

92. An method for locating a mobile radio transceiver in a cellular communications system as claimed in claim 71, further comprising measuring a plurality of lines of bearing from the sensor station and determining the relative motion of the plurality of lines of bearing.