CA2403039A1 - Modified transmission method for improving accuracy for emergency calls - Google Patents

Modified transmission method for improving accuracy for emergency calls Download PDF

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Publication number
CA2403039A1
CA2403039A1 CA002403039A CA2403039A CA2403039A1 CA 2403039 A1 CA2403039 A1 CA 2403039A1 CA 002403039 A CA002403039 A CA 002403039A CA 2403039 A CA2403039 A CA 2403039A CA 2403039 A1 CA2403039 A1 CA 2403039A1
Authority
CA
Canada
Prior art keywords
transmission method
emergency calls
improving accuracy
location
modified transmission
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.)
Granted
Application number
CA002403039A
Other languages
French (fr)
Other versions
CA2403039C (en
Inventor
Louis A. Stilp
Robert J. Anderson
Joseph W. Sheehan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Skyhook Holding Inc
Original Assignee
Trueposition, Inc.
Louis A. Stilp
Robert J. Anderson
Joseph W. Sheehan
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Trueposition, Inc., Louis A. Stilp, Robert J. Anderson, Joseph W. Sheehan filed Critical Trueposition, Inc.
Publication of CA2403039A1 publication Critical patent/CA2403039A1/en
Application granted granted Critical
Publication of CA2403039C publication Critical patent/CA2403039C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • G01S5/06—Position of source determined by co-ordinating a plurality of position lines defined by path-difference measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections
    • 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
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/022—Means for monitoring or calibrating
    • G01S1/026—Means for monitoring or calibrating of associated receivers
    • 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
    • G01S2205/001—Transmission of position information to remote stations
    • G01S2205/006—Transmission of position information to remote stations for emergency situations
    • 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
    • G01S2205/001—Transmission of position information to remote stations
    • G01S2205/008—Transmission of position information to remote stations using a mobile telephone network

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Business, Economics & Management (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Public Health (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transmitters (AREA)
  • Steroid Compounds (AREA)
  • Radio Transmission System (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

A wireless location system for providing an accurate location for a mobile unit comprises a signal collection system (10), a TDOA location processor (12), an application processor (14) and a network operation console (16). The location determination process uses a modification of the transmission parameters in order to minimize the interference in the wireless location system.
CA002403039A 2000-03-31 2001-03-22 Modified transmission method for improving accuracy for emergency calls Expired - Lifetime CA2403039C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/541,888 US6334059B1 (en) 1999-01-08 2000-03-31 Modified transmission method for improving accuracy for e-911 calls
US09/541,888 2000-03-31
PCT/US2001/009078 WO2001076093A1 (en) 2000-03-31 2001-03-22 Modified transmission method for improving accuracy for e-911 calls

Publications (2)

Publication Number Publication Date
CA2403039A1 true CA2403039A1 (en) 2001-10-11
CA2403039C CA2403039C (en) 2007-06-19

Family

ID=24161512

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002403039A Expired - Lifetime CA2403039C (en) 2000-03-31 2001-03-22 Modified transmission method for improving accuracy for emergency calls

Country Status (14)

Country Link
US (3) US6334059B1 (en)
EP (1) EP1275209B1 (en)
JP (1) JP4971573B2 (en)
KR (1) KR100735001B1 (en)
CN (1) CN1327634C (en)
AT (1) ATE389304T1 (en)
AU (1) AU2001245917A1 (en)
BR (1) BR0107538A (en)
CA (1) CA2403039C (en)
DE (1) DE60133185D1 (en)
GB (1) GB2377863B (en)
IL (2) IL151754A0 (en)
MX (1) MXPA02009450A (en)
WO (1) WO2001076093A1 (en)

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