CA2195591A1 - Method and apparatus for determining the location of a mobile telephone - Google Patents

Method and apparatus for determining the location of a mobile telephone

Info

Publication number
CA2195591A1
CA2195591A1 CA002195591A CA2195591A CA2195591A1 CA 2195591 A1 CA2195591 A1 CA 2195591A1 CA 002195591 A CA002195591 A CA 002195591A CA 2195591 A CA2195591 A CA 2195591A CA 2195591 A1 CA2195591 A1 CA 2195591A1
Authority
CA
Canada
Prior art keywords
location
mobile telephone
mobile
calculated
area
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
CA002195591A
Other languages
French (fr)
Other versions
CA2195591C (en
Inventor
Nicolas Kauser
Alan Denis Macdonald
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.)
AT&T Mobility II LLC
Original Assignee
AT&T Wireless Services Inc
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
Priority claimed from US08/603,793 external-priority patent/US5724660A/en
Application filed by AT&T Wireless Services Inc filed Critical AT&T Wireless Services Inc
Publication of CA2195591A1 publication Critical patent/CA2195591A1/en
Application granted granted Critical
Publication of CA2195591C publication Critical patent/CA2195591C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

A method and apparatus for determining the location of a mobile telephone within the serving area of a mobile telephone system are disclosed. A mobile switching center analyzes the calling mobile telephone number and called telephone number to determine if a location function is required. Upon initiation of the location function by the mobile switching center, a mobile location module calculates a location estimate of the mobile telephone. The mobile location module receives a list of signal strengths received by the mobile telephone from cell site antennas within the serving area. The distance between the mobile telephone and a plurality of cell site antennas is calculated using a technique which reduces the error component of the calculated distances. These reduced error distances are used togeometrically determine an estimate of the location area. In addition, the mobile telephone comprises a GPS receiver/processor for sending the most recent GPS coordinates of the mobile telephone which are within a predetermined confidence level to the mobile location module. These GPS coordinates are compared with the calculated location area to increase the accuracy of the location determination.
CA002195591A 1996-02-20 1997-01-21 Method and apparatus for determining the location of a mobile telephone Expired - Fee Related CA2195591C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US603,793 1996-02-20
US08/603,793 US5724660A (en) 1995-06-07 1996-02-20 Method and apparatus for locating a mobile station by comparing calculated location area with GPS coordinates

Publications (2)

Publication Number Publication Date
CA2195591A1 true CA2195591A1 (en) 1997-08-21
CA2195591C CA2195591C (en) 2001-09-04

Family

ID=24416939

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002195591A Expired - Fee Related CA2195591C (en) 1996-02-20 1997-01-21 Method and apparatus for determining the location of a mobile telephone

Country Status (2)

Country Link
BR (1) BR9701024B1 (en)
CA (1) CA2195591C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7362239B2 (en) 2004-06-01 2008-04-22 Persen Technologies Incorporated Vehicle warning system
RU2494411C2 (en) * 2002-10-17 2013-09-27 Квэлкомм Инкорпорейтед Method and apparatus for improving accuracy of radar location using measurements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2494411C2 (en) * 2002-10-17 2013-09-27 Квэлкомм Инкорпорейтед Method and apparatus for improving accuracy of radar location using measurements
US7362239B2 (en) 2004-06-01 2008-04-22 Persen Technologies Incorporated Vehicle warning system

Also Published As

Publication number Publication date
CA2195591C (en) 2001-09-04
MX9701205A (en) 1998-05-31
BR9701024A (en) 1998-11-03
BR9701024B1 (en) 2009-08-11

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20170123