BR0006781A - Método de ajuste de tempo - Google Patents

Método de ajuste de tempo

Info

Publication number
BR0006781A
BR0006781A BR0006781-4A BR0006781A BR0006781A BR 0006781 A BR0006781 A BR 0006781A BR 0006781 A BR0006781 A BR 0006781A BR 0006781 A BR0006781 A BR 0006781A
Authority
BR
Brazil
Prior art keywords
gps
timing
time adjustment
frame limit
time
Prior art date
Application number
BR0006781-4A
Other languages
English (en)
Inventor
Christopher Burke Barroso
Byron Hua Chen
Giovanni Vannucci
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 BR0006781A publication Critical patent/BR0006781A/pt

Links

Classifications

    • 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
    • H04B7/155—Ground-based stations
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G7/00—Synchronisation
    • G04G7/02—Synchronisation by radio
    • 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
    • G01S19/14—Receivers specially adapted for specific applications

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Navigation (AREA)

Abstract

<B>MéTODO DE AJUSTE DE TEMPO<D> Revela-se um método para derivar, com precisão, temporização de satélite de posicionamento global (GPS) mediante ajuste dos limites de quadro para temporização GPS. O ajuste de tempo é obtida determinando-se uma diferença de tempo <30>t entre um tempo de referência (ou pulso) GPS e um enésimo limite de quadro. A diferença de tempo <30>t e um identificador de limite de quadro especificando o enésimo limite de quadro são fornecidos por um aparelho equipado com um receptor GPS, total ou parcial, de modo a que o aparelho equipado com GPS possa sincronizar-se com a temporização GPS. Ao sincronizar-se com a temporização GPS, o aparelho equipado com GPS pode buscar correspondentes sinais usando informação fornecida por um servidor de localização geográfica, por exemplo, o servidor WAG.
BR0006781-4A 1999-11-12 2000-11-08 Método de ajuste de tempo BR0006781A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/439,217 US7142878B1 (en) 1999-11-12 1999-11-12 Method of timing calibration

Publications (1)

Publication Number Publication Date
BR0006781A true BR0006781A (pt) 2001-07-24

Family

ID=23743788

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0006781-4A BR0006781A (pt) 1999-11-12 2000-11-08 Método de ajuste de tempo

Country Status (8)

Country Link
US (1) US7142878B1 (pt)
EP (1) EP1099955A3 (pt)
JP (1) JP2001194443A (pt)
KR (1) KR20010051654A (pt)
CN (1) CN1297155A (pt)
AU (1) AU7141400A (pt)
BR (1) BR0006781A (pt)
CA (1) CA2324798A1 (pt)

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US7929928B2 (en) * 2000-05-18 2011-04-19 Sirf Technology Inc. Frequency phase correction system
US6748202B2 (en) * 2001-12-12 2004-06-08 Nokia Corporation Method, apparatus and system for synchronizing a cellular communication system to GPS time
CN1192531C (zh) * 2001-12-21 2005-03-09 华为技术有限公司 一种宽带码分多址***同步的实现方法
US6944540B2 (en) * 2002-03-28 2005-09-13 Motorola, Inc. Time determination in satellite positioning system receivers and methods therefor
FI20020964A0 (fi) 2002-05-22 2002-05-22 Nokia Corp Menetelmä satelliittitietoliikennejärjestelmän ohjaamiseksi, ajoitusyksikkö ja ajoitusyksikön ohjausyksikkö
EP1763682A1 (en) * 2004-06-29 2007-03-21 Telefonaktiebolaget LM Ericsson (publ) Assisted satellite-based positioning
US7453956B2 (en) * 2004-08-16 2008-11-18 Sony Ericsson Mobile Communications Ab Apparatus, methods and computer program products for signal acquisition using common demodulation templates
EP2074711A2 (en) * 2006-10-06 2009-07-01 ViaSat, Inc. Forward and reverse calibration for ground-based beamforming
US9363633B2 (en) 2010-02-22 2016-06-07 Nokia Technologies Oy Accurate GNSS time handling in dual/multi-SIM terminals
EP2539730B1 (en) * 2010-02-22 2015-07-08 Nokia Technologies Oy Accurate gnss time handling in dual/multi-sim terminals
CN104808742A (zh) * 2015-01-28 2015-07-29 浪潮集团有限公司 一种基于bds的时间校准方法
DE102015121724A1 (de) * 2015-12-14 2017-06-14 Symeo Gmbh System und Verfahren mit zumindest drei Signale empfangenden Stationen
CN113939005B (zh) * 2020-06-29 2024-05-07 北京小米移动软件有限公司 下行同步方法、用户设备、电子设备及计算机存储介质
CN112434108A (zh) * 2020-11-10 2021-03-02 深圳市明源云科技有限公司 一种数据库同步的方法、装置及设备
CN113890841B (zh) * 2021-09-16 2023-03-24 清华大学 高效的大规模单向延迟测量方法及装置

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JPS58111784A (ja) * 1981-12-25 1983-07-02 Nec Corp 時刻の遠隔較正方式
JPH0555975A (ja) * 1991-08-26 1993-03-05 Fujitsu Ltd 衛星同報通信方式及び衛星同報通信装置
US6266008B1 (en) * 1991-12-10 2001-07-24 Charles D. Huston System and method for determining freight container locations
US5245634A (en) * 1992-03-23 1993-09-14 Motorola, Inc. Base-site synchronization in a communication system
CA2091962A1 (en) * 1992-03-31 1993-10-01 Mark L. Witsaman Clock synchronization system
US5510797A (en) * 1993-04-15 1996-04-23 Trimble Navigation Limited Provision of SPS timing signals
US5697082A (en) * 1993-10-01 1997-12-09 Greer; Steven Craig Self-calibrating frequency standard system
US5477458A (en) * 1994-01-03 1995-12-19 Trimble Navigation Limited Network for carrier phase differential GPS corrections
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
GB9524754D0 (en) 1995-12-04 1996-04-24 Symmetricom Inc Mobile position determination
US5945944A (en) * 1996-03-08 1999-08-31 Snaptrack, Inc. Method and apparatus for determining time for GPS receivers
US6215442B1 (en) * 1997-02-03 2001-04-10 Snaptrack, Inc. Method and apparatus for determining time in a satellite positioning system
US5995820A (en) * 1997-06-17 1999-11-30 Lsi Logic Corporation Apparatus and method for calibration of sleep mode clock in wireless communications mobile station
US6201802B1 (en) * 1997-08-29 2001-03-13 Qualcomm Inc. Method and apparatus for analyzing base station timing
US6118977A (en) * 1997-09-11 2000-09-12 Lucent Technologies, Inc. Telecommunications-assisted satellite positioning system
US6070078A (en) 1997-10-15 2000-05-30 Ericsson Inc. Reduced global positioning system receiver code shift search space for a cellular telephone system
US6181932B1 (en) * 1998-02-25 2001-01-30 Ericsson Inc. Methods and systems for reducing location update procedures in satellite communications systems
US6411811B2 (en) 1998-04-20 2002-06-25 Ericsson Inc. System and method for provisioning assistance global positioning system information to a mobile station
JP4267092B2 (ja) * 1998-07-07 2009-05-27 富士通株式会社 時刻同期方法
US6415154B1 (en) * 1998-10-06 2002-07-02 Ericsson Inc. Method and apparatus for communicating auxilliary information and location information between a cellular telephone network and a global positioning system receiver for reducing code shift search time of the receiver
US6166685A (en) * 1998-11-19 2000-12-26 Qualcomm Incorporated Wireless user position update using infrastructure measurements
JP2001116821A (ja) * 1999-10-15 2001-04-27 Sony Corp Ｇｐｓ測位方法およびｇｐｓ受信装置

Also Published As

Publication number Publication date
EP1099955A2 (en) 2001-05-16
CN1297155A (zh) 2001-05-30
JP2001194443A (ja) 2001-07-19
EP1099955A3 (en) 2003-05-02
KR20010051654A (ko) 2001-06-25
CA2324798A1 (en) 2001-05-12
AU7141400A (en) 2001-05-17
US7142878B1 (en) 2006-11-28

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Legal Events

Date Code Title Description
B11A Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing
B11Y Definitive dismissal acc. article 33 of ipl - extension of time limit for request of examination expired
B15K Others concerning applications: alteration of classification

Free format text: PROCEDIMENTO AUTOMATICO DE RECLASSIFICACAO. AS CLASSIFICACOES IPC ANTERIORES ERAM: H04Q 7/22; G01S 1/04.

Ipc: G04G 7/00 (2006.01), G01S 19/14 (2010.01)

Ipc: G04G 7/00 (2006.01), G01S 19/14 (2010.01)