CA2245290A1 - Telecommunications-assisted satellite positioning system - Google Patents

Telecommunications-assisted satellite positioning system

Info

Publication number
CA2245290A1
CA2245290A1 CA002245290A CA2245290A CA2245290A1 CA 2245290 A1 CA2245290 A1 CA 2245290A1 CA 002245290 A CA002245290 A CA 002245290A CA 2245290 A CA2245290 A CA 2245290A CA 2245290 A1 CA2245290 A1 CA 2245290A1
Authority
CA
Canada
Prior art keywords
wireless terminal
auxiliary system
telecommunications
positioning system
satellite positioning
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
CA002245290A
Other languages
French (fr)
Other versions
CA2245290C (en
Inventor
Giovanni Vannucci
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.)
IDPA Holdings Inc
Original Assignee
Lucent Technologies 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
Application filed by Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of CA2245290A1 publication Critical patent/CA2245290A1/en
Application granted granted Critical
Publication of CA2245290C publication Critical patent/CA2245290C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
    • G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
    • 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
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/05—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing aiding data
    • G01S19/06—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing aiding data employing an initial estimate of the location of the receiver as aiding data or in generating aiding data
    • 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
    • G01S5/0045—Transmission from base station to mobile station
    • G01S5/0063—Transmission from base station to mobile station of measured values, i.e. measurement on base station and position calculation on mobile
    • 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
    • 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
    • G01S5/0018—Transmission from mobile station to base station
    • G01S5/0027—Transmission from mobile station to base station of actual mobile position, i.e. position determined on mobile
    • 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
    • G01S5/0018—Transmission from mobile station to base station
    • G01S5/0036—Transmission from mobile station to base station of measured values, i.e. measurement on mobile and position calculation on base station

Abstract

A wireless terminal and auxiliary system are disclosed that enable the wireless terminal to determine its location based on signals transmitted from navigation satellites In particular, the tasks of signal acquisition and signal processing required of a wireless terminal in the prior art are divided between the wireless terminal and the auxiliary system in accordance with the illustrative embodiment. The auxiliary system assists the wireless terminal by acquiring information about the satellites' ephemerides, by partially processing it and by transmitting the partially processed information to the wireless terminal in a form that is useful to the wireless terminal. The wireless terminal then uses the partially processed information from the auxiliary system to assist the wireless terminal in acquiring the ranging signals from the navigation satellites quickly and when they are weak.
CA002245290A 1997-09-11 1998-08-19 Telecommunications-assisted satellite positioning system Expired - Fee Related CA2245290C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/927,432 US6118977A (en) 1997-09-11 1997-09-11 Telecommunications-assisted satellite positioning system
US08/927,432 1997-09-11

Publications (2)

Publication Number Publication Date
CA2245290A1 true CA2245290A1 (en) 1999-03-11
CA2245290C CA2245290C (en) 2003-01-21

Family

ID=25454713

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002245290A Expired - Fee Related CA2245290C (en) 1997-09-11 1998-08-19 Telecommunications-assisted satellite positioning system

Country Status (6)

Country Link
US (2) US6118977A (en)
EP (1) EP0902300B1 (en)
JP (2) JP3352954B2 (en)
KR (1) KR100327035B1 (en)
CA (1) CA2245290C (en)
DE (1) DE69840661D1 (en)

Families Citing this family (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6560461B1 (en) 1997-08-04 2003-05-06 Mundi Fomukong Authorized location reporting paging system
US6114991A (en) * 1997-09-11 2000-09-05 Lucent Technologies, Inc. Auxiliary system for assisting a wireless terminal in determining its position from signals transmitted from a navigation satellite
US6353412B1 (en) * 1998-03-17 2002-03-05 Qualcomm, Incorporated Method and apparatus for determining position location using reduced number of GPS satellites and synchronized and unsynchronized base stations
US6538600B1 (en) * 1998-10-16 2003-03-25 Lucent Technologies Inc. Wireless assisted GPS using a reference location
US7215967B1 (en) * 1998-12-22 2007-05-08 Telefonaktiebolaget Lm Ericsson (Publ) System and method for fast cold start of a GPS receiver in a telecommunications environment
GB2347035B (en) * 1999-02-16 2003-10-08 Symmetricom Inc Positioning system
US6829534B2 (en) 1999-04-23 2004-12-07 Global Locate, Inc. Method and apparatus for performing timing synchronization
US6453237B1 (en) * 1999-04-23 2002-09-17 Global Locate, Inc. Method and apparatus for locating and providing services to mobile devices
US7053824B2 (en) * 2001-11-06 2006-05-30 Global Locate, Inc. Method and apparatus for receiving a global positioning system signal using a cellular acquisition signal
US6301545B1 (en) * 1999-04-30 2001-10-09 Sirf Technology, Inc. Global positioning system tag system
AU4831500A (en) * 1999-05-10 2000-11-21 Andrew L. Di Rienzo Authentication
US7142878B1 (en) * 1999-11-12 2006-11-28 Lucent Technologies Inc. Method of timing calibration
FI108895B (en) * 2000-01-04 2002-04-15 Nokia Corp Method for performing location and electronic device determination
US6252545B1 (en) * 2000-02-04 2001-06-26 Lucent Technologies Inc. Enhancement of signal-detection capability of GPS systems
US6970708B1 (en) * 2000-02-05 2005-11-29 Ericsson Inc. System and method for improving channel monitoring in a cellular system
JP3462826B2 (en) * 2000-02-14 2003-11-05 三洋電機株式会社 Wireless base station and wireless telephone device
US6922546B1 (en) * 2000-05-03 2005-07-26 Lucent Technologies Inc. GPS signal acquisition based on frequency-domain and time-domain processing
GB0013148D0 (en) 2000-05-31 2000-07-19 Koninkl Philips Electronics Nv A method of despreading GPS stread spectrum signals
US6775802B2 (en) 2000-08-08 2004-08-10 Qualcomm Incorporated Method, apparatus, and system for signal prediction
US6611756B1 (en) * 2000-08-10 2003-08-26 Lucent Technologies Inc. Method for predicting navigation information in a global positioning system
US7009948B1 (en) * 2000-10-05 2006-03-07 Ericsson Inc. Systems and methods for providing GPS time and assistance in a communications network
US6437734B1 (en) * 2000-10-11 2002-08-20 Seiko Epson Corporation Satellite navigation receiver and method
US7196660B2 (en) * 2000-11-17 2007-03-27 Global Locate, Inc Method and system for determining time in a satellite positioning system
US6937187B2 (en) 2000-11-17 2005-08-30 Global Locate, Inc. Method and apparatus for forming a dynamic model to locate position of a satellite receiver
US20070200752A1 (en) * 2001-06-06 2007-08-30 Global Locate, Inc. Method and apparatus for maintaining integrity of long-term orbits in a remote receiver
US7443340B2 (en) 2001-06-06 2008-10-28 Global Locate, Inc. Method and apparatus for generating and distributing satellite tracking information
US6525688B2 (en) * 2000-12-04 2003-02-25 Enuvis, Inc. Location-determination method and apparatus
US6535815B2 (en) * 2000-12-22 2003-03-18 Telefonaktiebolaget L. M. Ericsson Position updating method for a mobile terminal equipped with a positioning receiver
US6801778B2 (en) * 2001-01-31 2004-10-05 Ericsson Inc. Efficient location of mobile radiotelephones using cellular and GPS information
US8090536B2 (en) * 2001-06-06 2012-01-03 Broadcom Corporation Method and apparatus for compression of long term orbit data
US20080125971A1 (en) * 2001-06-06 2008-05-29 Van Diggelen Frank Method and apparatus for improving accuracy and/or integrity of long-term-orbit information for a global-navigation-satellite system
US20080186229A1 (en) * 2001-06-06 2008-08-07 Van Diggelen Frank Method and Apparatus for Monitoring Satellite-Constellation Configuration To Maintain Integrity of Long-Term-Orbit Information In A Remote Receiver
US8212719B2 (en) * 2001-06-06 2012-07-03 Global Locate, Inc. Method and apparatus for background decoding of a satellite navigation message to maintain integrity of long term orbit information in a remote receiver
US7548816B2 (en) 2001-06-06 2009-06-16 Global Locate, Inc. Method and apparatus for generating and securely distributing long-term satellite tracking information
US8358245B2 (en) * 2001-06-06 2013-01-22 Broadcom Corporation Method and system for extending the usability period of long term orbit (LTO)
US6651000B2 (en) * 2001-07-25 2003-11-18 Global Locate, Inc. Method and apparatus for generating and distributing satellite tracking information in a compact format
US6704652B2 (en) * 2001-10-29 2004-03-09 Total Soft Bank Ltd. Real time self differential global positioning system and method for a moving station in a local area, and terminal global positioning system using the same
US7656350B2 (en) * 2001-11-06 2010-02-02 Global Locate Method and apparatus for processing a satellite positioning system signal using a cellular acquisition signal
US7239271B1 (en) 2002-08-15 2007-07-03 Sirf Technology, Inc. Partial almanac collection system
CN100409029C (en) 2002-08-15 2008-08-06 SiRF技术公司 Interface for a GPS system
US7158080B2 (en) * 2002-10-02 2007-01-02 Global Locate, Inc. Method and apparatus for using long term satellite tracking data in a remote receiver
US7595752B2 (en) * 2002-10-02 2009-09-29 Global Locate, Inc. Method and apparatus for enhanced autonomous GPS
US7139225B2 (en) * 2003-03-27 2006-11-21 Qualcomm, Incorporated Virtual real-time clock based on time information from multiple communication systems
US20040263386A1 (en) * 2003-06-26 2004-12-30 King Thomas M. Satellite positioning system receivers and methods
EP1664829A1 (en) * 2003-09-18 2006-06-07 Sirf Technology, Inc. Partial almanac collection system
FI20031417A0 (en) * 2003-09-30 2003-09-30 Nokia Corp Forwarding of location assistance information to a mobile station
US8046001B2 (en) 2006-11-17 2011-10-25 Yoram Shalmon Method of providing advertising to mobile units
DE102007045711A1 (en) * 2007-09-24 2009-04-02 Astrium Gmbh Method and device for automatically determining the position of transceivers of navigation signals
FR2951832B1 (en) 2009-10-26 2011-12-23 Insiteo METHOD AND SYSTEM FOR ASSISTING THE LOCATION OF A MOBILE TERMINAL IN A CLOSED ENVIRONMENT USING PSEUDOLITE BASE STATIONS
US20110148700A1 (en) * 2009-12-18 2011-06-23 Lasagabaster Javier De Salas Method and system for mobile device based gnss position computation without ephemeris data

Family Cites Families (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US35498A (en) * 1862-06-10 Improvement in school-globes
US4313183A (en) 1980-06-27 1982-01-26 Saylors James A Acoustic distance measuring method and apparatus
US5062151A (en) 1983-01-13 1991-10-29 Fisher Berkeley Corporation Communication system
US4445118A (en) 1981-05-22 1984-04-24 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Navigation system and method
US5025457A (en) 1989-04-21 1991-06-18 Codex Corporation Synchronizing continuous bit stream oriented terminals in a communications network
GB2241623A (en) * 1990-02-28 1991-09-04 Philips Electronic Associated Vehicle location system
US5327572A (en) * 1990-03-06 1994-07-05 Motorola, Inc. Networked satellite and terrestrial cellular radiotelephone systems
US5208785A (en) 1990-09-26 1993-05-04 Rowe, Deines Instruments Incorporated Broadband acoustic doppler current profiler
US5239671A (en) * 1990-11-13 1993-08-24 Pagemart, Inc. Simulcast satellite paging system with provision for signal interruption
US5390207A (en) * 1990-11-28 1995-02-14 Novatel Communications Ltd. Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators
US5365544A (en) 1990-12-05 1994-11-15 Interdigital Technology Corporation CDMA communications and geolocation system and method
US5175557A (en) 1991-07-18 1992-12-29 Motorola, Inc. Two channel global positioning system receiver
US5524136A (en) 1992-04-20 1996-06-04 International Business Machines Corporation Tracking mobile users in wireless networks
US5515419A (en) 1992-06-01 1996-05-07 Trackmobile Tracking system and method for tracking a movable object carrying a cellular phone unit, and integrated personal protection system incorporating the tracking system
US5689245A (en) 1992-10-19 1997-11-18 Radio Satellite Corporation Integrated communications terminal
US5548583A (en) 1992-11-24 1996-08-20 Stanford Telecommuncations, Inc. Wireless telephone user location capability for enhanced 911 application
US5365450A (en) * 1992-12-17 1994-11-15 Stanford Telecommunications, Inc. Hybrid GPS/data line unit for rapid, precise, and robust position determination
US5422813A (en) * 1992-12-17 1995-06-06 Stanford Telecommunications, Inc. No-outage GPS/commercial RF positioning system
US5523761A (en) 1993-01-12 1996-06-04 Trimble Navigation Limited Differential GPS smart antenna device
US5587715A (en) * 1993-03-19 1996-12-24 Gps Mobile, Inc. Method and apparatus for tracking a moving object
US5510797A (en) 1993-04-15 1996-04-23 Trimble Navigation Limited Provision of SPS timing signals
US5604920A (en) * 1993-04-21 1997-02-18 Motorola, Inc. Satellite cellular telephone and data communication system
US5515062A (en) 1993-08-11 1996-05-07 Motorola, Inc. Location system and method with acquisition of accurate location parameters
US5500648A (en) 1993-08-11 1996-03-19 Motorola, Inc. Geolocation responsive radio telecommunication system and method therefor
US5444450A (en) 1993-08-11 1995-08-22 Motorola, Inc. Radio telecommunications system and method with adaptive location determination convergence
US5479482A (en) 1993-08-30 1995-12-26 At&T Corp. Cellular terminal for providing public emergency call location information
US5404376A (en) 1993-09-09 1995-04-04 Ericsson-Ge Mobile Communications Inc. Navigation assistance for call handling in mobile telephone systems
US5572216A (en) * 1993-11-19 1996-11-05 Stanford Telecommunications, Inc. System for increasing the utility of satellite communication systems
US5559520A (en) 1994-09-26 1996-09-24 Lucent Technologies Inc. Wireless information system for acquiring location related information
US5584046A (en) * 1994-11-04 1996-12-10 Cornell Research Foundation, Inc. Method and apparatus for spectrum sharing between satellite and terrestrial communication services using temporal and spatial synchronization
JPH08256085A (en) * 1995-03-17 1996-10-01 Sony Corp Spread spectrum communication system, and transmitter and receiver for the same
US5508708A (en) 1995-05-08 1996-04-16 Motorola, Inc. Method and apparatus for location finding in a CDMA system
US6023489A (en) * 1995-05-24 2000-02-08 Leica Geosystems Inc. Method and apparatus for code synchronization in a global positioning system receiver
US5790939A (en) * 1995-06-29 1998-08-04 Hughes Electronics Corporation Method and system of frame timing synchronization in TDMA based mobile satellite communication system
US5642377A (en) 1995-07-25 1997-06-24 Nokia Mobile Phones, Ltd. Serial search acquisition system with adaptive threshold and optimal decision for spread spectrum systems
US5872810A (en) 1996-01-26 1999-02-16 Imec Co. Programmable modem apparatus for transmitting and receiving digital data, design method and use method for said modem
ATE511662T1 (en) * 1995-10-09 2011-06-15 Snaptrack Inc GPS RECEIVER AND METHOD FOR PROCESSING GPS SIGNALS
US5874914A (en) * 1995-10-09 1999-02-23 Snaptrack, Inc. GPS receiver utilizing a communication link
US5790602A (en) * 1995-12-15 1998-08-04 E-Systems, Inc. Receiver synchronization using punctured preamble
US5748144A (en) * 1996-01-26 1998-05-05 Trimble Navigation Limited GPS timing receiver using oversampling
JP3231624B2 (en) 1996-05-17 2001-11-26 松下電器産業株式会社 GPS receiver
US5646630A (en) * 1996-05-20 1997-07-08 Trimble Navigation Limited Network of equivalent ground transmitters
US5739786A (en) * 1996-06-12 1998-04-14 The Charles Stark Draper Laboratory, Inc. GPS transfer initialization system
US5857155A (en) * 1996-07-10 1999-01-05 Motorola, Inc. Method and apparatus for geographic based control in a communication system
US5864579A (en) * 1996-07-25 1999-01-26 Cd Radio Inc. Digital radio satellite and terrestrial ubiquitous broadcasting system using spread spectrum modulation
US5781151A (en) * 1996-09-19 1998-07-14 Parker-Hannifin Corporation Interferometric trajectory reconstruction technique for flight inspection of radio navigation aids
US5687116A (en) 1996-10-09 1997-11-11 Programmable Microelectronics Corp. Programming pulse ramp control circuit
US5893044A (en) * 1997-01-21 1999-04-06 Motorola Inc. Real time clock apparatus for fast acquisition or GPS signals
US6101178A (en) * 1997-07-10 2000-08-08 Ksi Inc. Pseudolite-augmented GPS for locating wireless telephones
US5912644A (en) 1997-08-05 1999-06-15 Wang; James J. M. Spread spectrum position determination, ranging and communication system
US5959577A (en) * 1997-08-28 1999-09-28 Vectorlink, Inc. Method and structure for distribution of travel information using network
US6114991A (en) * 1997-09-11 2000-09-05 Lucent Technologies, Inc. Auxiliary system for assisting a wireless terminal in determining its position from signals transmitted from a navigation satellite

Also Published As

Publication number Publication date
EP0902300A2 (en) 1999-03-17
DE69840661D1 (en) 2009-04-30
US6256475B1 (en) 2001-07-03
JPH11174142A (en) 1999-07-02
KR100327035B1 (en) 2002-04-17
JP3352954B2 (en) 2002-12-03
US6118977A (en) 2000-09-12
JP2003043130A (en) 2003-02-13
JP4112281B2 (en) 2008-07-02
CA2245290C (en) 2003-01-21
EP0902300A3 (en) 1999-09-29
EP0902300B1 (en) 2009-03-18
KR19990029722A (en) 1999-04-26

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