CA2320996A1 - Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system - Google Patents

Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system Download PDF

Info

Publication number
CA2320996A1
CA2320996A1 CA002320996A CA2320996A CA2320996A1 CA 2320996 A1 CA2320996 A1 CA 2320996A1 CA 002320996 A CA002320996 A CA 002320996A CA 2320996 A CA2320996 A CA 2320996A CA 2320996 A1 CA2320996 A1 CA 2320996A1
Authority
CA
Canada
Prior art keywords
base stations
mobile communications
communications system
time
cdma mobile
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
CA002320996A
Other languages
French (fr)
Other versions
CA2320996C (en
Inventor
Erik Bengt Lennart Dahlman
Karim Jamal
Per Johan Anders Nystrom
Mats Cedervall
Patrik Nils Lundqvist
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA2603277A priority Critical patent/CA2603277C/en
Priority to CA2600700A priority patent/CA2600700C/en
Publication of CA2320996A1 publication Critical patent/CA2320996A1/en
Application granted granted Critical
Publication of CA2320996C publication Critical patent/CA2320996C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7083—Cell search, e.g. using a three-step approach
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/002—Mutual synchronization
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface

Abstract

A method for estimating relative timing of base stations in an asynchronous mobile communications system comprises receiving at a first mobile station first and second downlink signals transmitted by first and second base stations;
transmitting an uplink signal from the first mobile station to the first and second base stations; and calculating estimated relative time difference between the time bases of the first and second base stations using receive times at the first and second base stations of said uplink signal, transmit times of the first and second downlink signals, and a time difference at the first mobile station between a receive time of the second downlink signal and the transmit time of said uplink signal to account for propagation delays between first and second mobile stations.
CA002320996A 1998-02-12 1999-02-09 Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system Expired - Lifetime CA2320996C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA2603277A CA2603277C (en) 1998-02-12 1999-02-09 Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system
CA2600700A CA2600700C (en) 1998-02-12 1999-02-09 Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US7449498P 1998-02-12 1998-02-12
US60/074,494 1998-02-12
US09/243,095 1999-02-02
US09/243,095 US6526039B1 (en) 1998-02-12 1999-02-02 Method and system for facilitating timing of base stations in an asynchronous CDMA mobile communications system
PCT/SE1999/000169 WO1999041854A1 (en) 1998-02-12 1999-02-09 Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system

Related Child Applications (2)

Application Number Title Priority Date Filing Date
CA2603277A Division CA2603277C (en) 1998-02-12 1999-02-09 Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system
CA2600700A Division CA2600700C (en) 1998-02-12 1999-02-09 Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system

Publications (2)

Publication Number Publication Date
CA2320996A1 true CA2320996A1 (en) 1999-08-19
CA2320996C CA2320996C (en) 2009-01-20

Family

ID=26755727

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002320996A Expired - Lifetime CA2320996C (en) 1998-02-12 1999-02-09 Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system

Country Status (11)

Country Link
US (1) US6526039B1 (en)
EP (1) EP1055295B1 (en)
JP (1) JP4373002B2 (en)
KR (1) KR100602836B1 (en)
CN (1) CN1126298C (en)
AR (1) AR018283A1 (en)
AU (1) AU761795B2 (en)
BR (1) BR9907857A (en)
CA (1) CA2320996C (en)
DE (1) DE69939008D1 (en)
WO (1) WO1999041854A1 (en)

Families Citing this family (141)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6542481B2 (en) 1998-06-01 2003-04-01 Tantivy Communications, Inc. Dynamic bandwidth allocation for multiple access communication using session queues
US6151332A (en) 1997-06-20 2000-11-21 Tantivy Communications, Inc. Protocol conversion and bandwidth reduction technique providing multiple nB+D ISDN basic rate interface links over a wireless code division multiple access communication system
US6081536A (en) * 1997-06-20 2000-06-27 Tantivy Communications, Inc. Dynamic bandwidth allocation to transmit a wireless protocol across a code division multiple access (CDMA) radio link
US20040160910A1 (en) * 1997-12-17 2004-08-19 Tantivy Communications, Inc. Dynamic bandwidth allocation to transmit a wireless protocol across a code division multiple access (CDMA) radio link
US9525923B2 (en) 1997-12-17 2016-12-20 Intel Corporation Multi-detection of heartbeat to reduce error probability
US6222832B1 (en) * 1998-06-01 2001-04-24 Tantivy Communications, Inc. Fast Acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system
US7496072B2 (en) * 1997-12-17 2009-02-24 Interdigital Technology Corporation System and method for controlling signal strength over a reverse link of a CDMA wireless communication system
US7079523B2 (en) * 2000-02-07 2006-07-18 Ipr Licensing, Inc. Maintenance link using active/standby request channels
US7394791B2 (en) * 1997-12-17 2008-07-01 Interdigital Technology Corporation Multi-detection of heartbeat to reduce error probability
US7936728B2 (en) * 1997-12-17 2011-05-03 Tantivy Communications, Inc. System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system
US6879575B1 (en) * 1998-05-13 2005-04-12 Hitachi, Ltd. Code division multiple access mobile communication system
US8134980B2 (en) * 1998-06-01 2012-03-13 Ipr Licensing, Inc. Transmittal of heartbeat signal at a lower level than heartbeat request
US7773566B2 (en) * 1998-06-01 2010-08-10 Tantivy Communications, Inc. System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system
US7221664B2 (en) * 1998-06-01 2007-05-22 Interdigital Technology Corporation Transmittal of heartbeat signal at a lower level than heartbeat request
GB9819482D0 (en) * 1998-09-07 1998-10-28 Nokia Telecommunications Oy Communication system
US6614776B1 (en) 1999-04-28 2003-09-02 Tantivy Communications, Inc. Forward error correction scheme for high rate data exchange in a wireless system
EP1104977A4 (en) * 1999-06-15 2005-12-21 Ntt Docomo Inc Peripheral base station information updating method, information control method for cell search in mobile communication system, cell search method in mobile station, mobile communication system, base station and control station
GB9920248D0 (en) * 1999-08-26 1999-10-27 Motorola Ltd A method of measuring radio signals and apparatus therefor
JP2001086032A (en) * 1999-09-10 2001-03-30 Pioneer Electronic Corp Communication equioment and communication method
JP2001086035A (en) * 1999-09-14 2001-03-30 Nec Corp Cell search method in cdma
US6675015B1 (en) 1999-09-15 2004-01-06 Nokia Corporation Apparatus, and associated method, for facilitating communication handovers in a bluetooth-public-access radio communication system
US6526034B1 (en) * 1999-09-21 2003-02-25 Tantivy Communications, Inc. Dual mode subscriber unit for short range, high rate and long range, lower rate data communications
EP1094681A1 (en) * 1999-10-19 2001-04-25 Hyundai Electronics Industries Co., Ltd. Method for processing synchronous message in asynchronous mobile communication system
US6704581B1 (en) * 1999-11-13 2004-03-09 Hyundai Electronics Industry Co. Mobile telecommunication system and method for performing handoff between asynchronous base station and synchronous base station
FI19992612A (en) * 1999-12-03 2001-06-04 Nokia Mobile Phones Ltd A method for transmitting communication link coverage
US8463255B2 (en) * 1999-12-20 2013-06-11 Ipr Licensing, Inc. Method and apparatus for a spectrally compliant cellular communication system
US6438117B1 (en) * 2000-01-07 2002-08-20 Qualcomm Incorporated Base station synchronization for handover in a hybrid GSM/CDMA network
AU3673001A (en) 2000-02-07 2001-08-14 Tantivy Communications, Inc. Minimal maintenance link to support synchronization
DE60035768T2 (en) * 2000-03-10 2007-12-06 Mitsubishi Electric Information Technology Centre Europe B.V. Method and apparatus for facilitating faster acquisition of target cell signals
DE1273112T1 (en) * 2000-04-06 2003-05-28 Interdigital Tech Corp SYNCHRONIZATION OF PROGRESSION AND DEVIATION
US6625467B2 (en) 2000-07-13 2003-09-23 Qualcomm, Incorporated Method and apparatus for performing idle mode reacquisition and handoff in an asynchronous communication system
GB0022634D0 (en) * 2000-09-15 2000-11-01 Koninkl Philips Electronics Nv Secondary station and method of operating the station
US7430197B1 (en) * 2000-09-29 2008-09-30 Arraycomm, Llc Radio communications system with a shared broadcast channel
US7110774B1 (en) * 2000-10-27 2006-09-19 Intel Corporation Dual mode uplink/downlink location measurement and multi-protocol location measurement
US7039418B2 (en) * 2000-11-16 2006-05-02 Qualcomm Incorporated Position determination in a wireless communication system with detection and compensation for repeaters
WO2002041530A1 (en) * 2000-11-16 2002-05-23 Sony Corporation Information processing apparatus and communication apparatus
US8155096B1 (en) 2000-12-01 2012-04-10 Ipr Licensing Inc. Antenna control system and method
GB0029739D0 (en) * 2000-12-06 2001-01-17 Univ Surrey Mobile positioning using integrated ad-hoc network
JP3510589B2 (en) * 2000-12-15 2004-03-29 Ｎｅｃエレクトロニクス株式会社 Cell search method and cell search device
US7765422B2 (en) * 2001-01-19 2010-07-27 Alcatel-Lucent Usa Inc. Method of determining a time offset estimate between a central node and a secondary node
US6954448B2 (en) 2001-02-01 2005-10-11 Ipr Licensing, Inc. Alternate channel for carrying selected message types
US7551663B1 (en) 2001-02-01 2009-06-23 Ipr Licensing, Inc. Use of correlation combination to achieve channel detection
KR100464375B1 (en) * 2001-02-21 2005-01-13 삼성전자주식회사 Method for controlling base station transmission time in a CDMA communication system for uplink synchronous transmission
GB2374252A (en) 2001-04-04 2002-10-09 Ubinetics Ltd Identification of neighbouring cell scrambling codes
ES2614202T3 (en) 2001-06-13 2017-05-30 Intel Corporation Method and apparatus for transmitting a heartbeat signal at a lower level than the request for heartbeat
US6894995B2 (en) * 2001-06-22 2005-05-17 Interdigital Technology Corporation Apparatus and method for performing initial cell search in wireless communication systems
US20030007471A1 (en) * 2001-07-03 2003-01-09 Daisuke Terasawa Operation of wideband code division multiple access base stations
US6775242B2 (en) * 2001-07-09 2004-08-10 Qualcomm Incorporated Method and apparatus for time-aligning transmissions from multiple base stations in a CDMA communication system
EP1278074A1 (en) * 2001-07-17 2003-01-22 Cambridge Positioning Systems Limited Radio positioning systems
US6744747B2 (en) * 2001-08-22 2004-06-01 Qualcomm, Incorporated Method & apparatus for W-CDMA handoff searching
KR100438546B1 (en) * 2001-10-26 2004-07-03 엘지전자 주식회사 Automatic time setting method for mobile communication device
KR100557509B1 (en) * 2001-10-27 2006-03-03 삼성전자주식회사 Cell search schedule in umts
US6847630B2 (en) * 2001-11-09 2005-01-25 Qualcomm, Incorporated Communications in an asynchronous cellular wireless network
FI113832B (en) * 2001-11-13 2004-06-15 Nokia Corp A method of performing synchronization to a signal in a wireless terminal and a wireless terminal
DE10156642A1 (en) * 2001-11-17 2003-06-12 Tenovis Gmbh & Co Kg Process for selecting a suitable base station in a multi-cell radio system and mobile telecommunications terminal
CN1192531C (en) * 2001-12-21 2005-03-09 华为技术有限公司 Synchronous realizing method of broad band CDMA system
US20030125045A1 (en) * 2001-12-27 2003-07-03 Riley Wyatt Thomas Creating and using base station almanac information in a wireless communication system having a position location capability
CN1292261C (en) * 2002-01-24 2006-12-27 华为技术有限公司 Localization measurement method of mobile station
US7813311B2 (en) * 2002-02-05 2010-10-12 Interdigital Technology Corporation Method and apparatus for synchronizing base stations
AU2003212004A1 (en) * 2002-02-18 2003-09-04 Sony Corporation Wireless communication system, wireless communication device and wireless communication method, and computer program
KR100856228B1 (en) * 2002-02-20 2008-09-03 삼성전자주식회사 Method for operating ipdl and holding in check overlapping of ipdl in a universal mobile telecommunications system
JP2003259413A (en) * 2002-03-01 2003-09-12 Matsushita Electric Ind Co Ltd Base station equipment and communication terminal
KR100469416B1 (en) * 2002-03-27 2005-02-02 엘지전자 주식회사 Location tracing apparatus and method for mobile terminal
GB2387072B (en) * 2002-03-28 2004-09-22 Motorola Inc Mobile communication stations, methods and systems
AU2003215882A1 (en) * 2002-04-01 2003-10-13 Schema Ltd. Hybrid channel allocation in a cellular network
US20030188029A1 (en) * 2002-04-01 2003-10-02 Schema Ltd. Determining cell service areas in a wireless network
US7236779B2 (en) * 2002-04-01 2007-06-26 Schema Ltd. Classification of cellular network drive test results
US20030210713A1 (en) * 2002-05-13 2003-11-13 Hisham Abdel-Ghaffar Estimating a time offset between link points in a communication network operating in a frequency division duplex mode
US7295808B2 (en) * 2002-09-05 2007-11-13 Soliman Samir S Method of and system for calibrating a repeater
US20040203882A1 (en) * 2002-11-15 2004-10-14 Jaana Laiho Location services
KR100689566B1 (en) * 2003-03-08 2007-03-02 삼성전자주식회사 System and method for handoff using initial ranging in broadband wireless access communication system
CN100397914C (en) * 2003-07-03 2008-06-25 华为技术有限公司 A method for implementing location update registration
US7123928B2 (en) 2003-07-21 2006-10-17 Qualcomm Incorporated Method and apparatus for creating and using a base station almanac for position determination
US7369534B2 (en) * 2003-08-27 2008-05-06 Qualcomm Incorporated Reducing search time using known scrambling code offsets
BRPI0414097A (en) * 2003-09-05 2006-11-14 Qualcomm Inc method to minimize maximum system time uncertainty for a mobile station
KR100557080B1 (en) * 2003-09-29 2006-03-03 삼성전자주식회사 Apparatus and method for locating mobile terminals
KR100605937B1 (en) * 2004-01-14 2006-08-01 삼성전자주식회사 Method for processing call in dual mode mobile communication terminal and the terminal
US9137771B2 (en) 2004-04-02 2015-09-15 Qualcomm Incorporated Methods and apparatuses for beacon assisted position determination systems
KR100965694B1 (en) * 2004-06-15 2010-06-24 삼성전자주식회사 System and method for supporting soft handover in a broadband wireless access communication system
US8099094B2 (en) 2004-07-12 2012-01-17 Interdigital Technology Corporation Neighbor scanning in wireless local area networks
UA92462C2 (en) * 2004-07-15 2010-11-10 Кьюбик Корпорейшн Method for prediction of position of aiming point in simulated medium (variants), system and computer system for its realization and method for improved tracking of aiming points to targets in simulated medium
CN100401838C (en) * 2004-07-31 2008-07-09 华为技术有限公司 Switch synchronization method for asynchronous CDMA system
KR100576002B1 (en) * 2004-12-17 2006-05-02 삼성전자주식회사 Positioning information service method, an internet protocol network system thereof, a mobile communicational terminal for receiving the service, and method thereof
US7813383B2 (en) 2005-03-10 2010-10-12 Qualcomm Incorporated Method for transmission of time division multiplexed pilot symbols to aid channel estimation, time synchronization, and AGC bootstrapping in a multicast wireless system
JP4592477B2 (en) * 2005-03-31 2010-12-01 株式会社エヌ・ティ・ティ・ドコモ Wireless communication system, base station, mobile station, and wireless communication method
US7477913B2 (en) * 2005-04-04 2009-01-13 Research In Motion Limited Determining a target transmit power of a wireless transmission according to security requirements
US8320356B2 (en) * 2005-04-28 2012-11-27 Panasonic Corporation Wireless communication apparatus and wireless communication method
TWI325733B (en) * 2005-05-10 2010-06-01 Qualcomm Inc Base station synchronization using multi-communication mode user equipment
US8364148B2 (en) 2005-07-07 2013-01-29 Qualcomm Incorporated Methods and devices for interworking of wireless wide area networks and wireless local area networks or wireless personal area networks
US8311543B2 (en) * 2005-07-07 2012-11-13 Qualcomm Incorporated Methods and devices for interworking of wireless wide area networks and wireless local area networks or wireless personal area networks
US8126477B2 (en) * 2005-07-07 2012-02-28 Qualcomm Incorporated Methods and devices for interworking of wireless wide area networks and wireless local area networks or wireless personal area networks
CN100438695C (en) * 2005-07-19 2008-11-26 华为技术有限公司 Method and device for detecting transmission time delay difference between soft exchange activating pole every base state
EP1941746B1 (en) * 2005-10-26 2018-10-24 Telefonaktiebolaget LM Ericsson (publ) Methods and arrangements in a mobile telecommunication network
CN100433613C (en) 2005-11-16 2008-11-12 华为技术有限公司 Method for detecting link disturbing code configuration conformance
JP4999425B2 (en) * 2005-11-29 2012-08-15 パナソニック株式会社 Communication apparatus and communication method
US8437288B2 (en) 2006-03-07 2013-05-07 Qualcomm Incorporated Network selection by wireless terminals
US7782806B2 (en) 2006-03-09 2010-08-24 Qualcomm Incorporated Timing synchronization and channel estimation at a transition between local and wide area waveforms using a designated TDM pilot
US20070280332A1 (en) * 2006-06-05 2007-12-06 Srikathyayani Srikanteswara Systems and Techniques for Radio Frequency Environment Awareness and Adaptation
US7570962B2 (en) * 2006-07-12 2009-08-04 Intel Corporation Wireless access network base station and method for determining location information for a mobile station using uplink time-difference of arrival
WO2008016246A1 (en) * 2006-07-31 2008-02-07 Electronics And Telecommunications Research Institute Ue data transmitting method and apparatus using cell search signal in synchronized cellular system
US7974633B2 (en) * 2006-08-18 2011-07-05 Andrew, Llc System and method for single sensor geolocation
US20080095133A1 (en) * 2006-10-23 2008-04-24 Shu Kodo Method for reducing inter-cell interference in communications system
KR101140053B1 (en) 2006-10-26 2012-05-02 콸콤 인코포레이티드 Method and apparatus for carrier frequency offset estimation and frame synchronization in a wireless communications system
US20080240013A1 (en) * 2007-03-30 2008-10-02 Sony Ericsson Mobile Communications Ab Power Control for Compressed Mode in WCDMA System
KR100846344B1 (en) * 2007-01-05 2008-07-15 삼성전자주식회사 Apparatus and method for reducing transmission control protocol latency in portable communication system
US20090023448A1 (en) * 2007-02-21 2009-01-22 Qualcomm Incorporated Method and apparatus for inter-system handover
CN101047434B (en) * 2007-04-10 2010-09-29 华为技术有限公司 Time tag synchronous method, system and device
EP2168390B1 (en) * 2007-06-19 2018-05-16 Telefonaktiebolaget LM Ericsson (publ) Improved resource reservation during handover in a wireless communication system
JP5135946B2 (en) * 2007-08-14 2013-02-06 富士通株式会社 Wireless positioning system
US8233432B2 (en) * 2007-08-31 2012-07-31 Silicon Image, Inc. Ensuring physical locality of entities sharing data
US8103267B2 (en) * 2007-09-26 2012-01-24 Via Telecom, Inc. Femtocell base station with mobile station capability
US8937936B2 (en) * 2007-10-05 2015-01-20 Via Telecom Inc. Acquiring time synchronization and location information with a femtocell
US9363770B2 (en) * 2007-10-05 2016-06-07 Ipcomm Automatic provisioning of handoff parameters for femtocell
US8223683B2 (en) * 2007-10-05 2012-07-17 VIA Telecom, Inc Automatic provisioning of femtocell
US8213391B2 (en) * 2007-10-05 2012-07-03 Via Telecom, Inc. Time synchronization of femtocell
US8248923B2 (en) * 2007-10-05 2012-08-21 Via Telecom, Inc. Automatic provisioning of admission policy for femtocell
US8472374B2 (en) * 2007-11-07 2013-06-25 Telefonaktiebolaget L M Ericsson (Publ) Distinguishing between synchronized and asynchronous mobile communications networks
KR101532107B1 (en) * 2007-11-21 2015-06-26 노오텔 네트웍스 리미티드 Computing an action time for allocation of resources to a mobile station that is handing over from a source to a target base station
KR101425440B1 (en) * 2008-01-14 2014-08-04 삼성전자주식회사 Mobile telecommunication system and joint resource allocation method for multi-station joint resource allocation and joint group handover
KR101500310B1 (en) * 2008-01-29 2015-03-18 알카텔-루센트 유에스에이 인코포레이티드 Method for positioning mobile devices and apparatus for positioning mobile devices
US8432878B2 (en) * 2008-05-02 2013-04-30 Industrial Technology Research Institute Method and apparatus for wireless communication
US8699450B2 (en) * 2008-05-11 2014-04-15 Qualcomm Incorporated Systems and methods for multimode wireless communication handoff
US9036599B2 (en) * 2008-05-11 2015-05-19 Qualcomm Incorporated Systems and methods for multimode wireless communication handoff
US8744493B2 (en) * 2008-05-28 2014-06-03 Via Telecom, Inc. Localized silence area for mobile devices
JP5233454B2 (en) * 2008-07-08 2013-07-10 富士通株式会社 Mobile terminal station and reception quality measuring method
JP5343747B2 (en) * 2008-09-30 2013-11-13 日本電気株式会社 Wireless communication system, management server, network selection method, and management server program
US8478228B2 (en) * 2008-10-20 2013-07-02 Qualcomm Incorporated Mobile receiver with location services capability
WO2010047102A1 (en) * 2008-10-24 2010-04-29 日本電気株式会社 Wireless base station, wireless access network, communication control circuit, storage medium and communication control method
US8892722B1 (en) * 2009-06-22 2014-11-18 Marvell International Ltd. Peer-to-peer discovery systems and methods
US8600297B2 (en) * 2009-07-28 2013-12-03 Qualcomm Incorporated Method and system for femto cell self-timing and self-locating
US9037163B2 (en) * 2009-10-09 2015-05-19 Qualcomm Incorporated Method and apparatus for continuity of positioning determination at handover
EP2456106B1 (en) * 2010-11-22 2013-11-06 Sequans Communications Cell search method for a downlink channel of an OFDMA transmission system
CN102547961B (en) * 2010-12-10 2016-06-08 华为技术有限公司 The method of synchronization among base stations, Apparatus and system
JP5644672B2 (en) * 2011-05-24 2014-12-24 富士通株式会社 Mobile station apparatus and synchronization timing determination method
US8738042B2 (en) 2011-10-12 2014-05-27 Qualcomm Incorporated Methods, systems, and devices for determining a closest base station to a multi-mode mobile device
US9369845B2 (en) 2012-03-23 2016-06-14 Skyhook Wireless, Inc. Methods and systems of assigning estimated positions and attributes to wireless access points in a positioning system
US9801155B2 (en) * 2012-09-17 2017-10-24 Intel Corporation Apparatus system and method of time-of-flight positioning via neighbor list
CN103983275B (en) * 2014-04-28 2016-11-09 上海融军科技有限公司 Double reference signal source aircraft directions scaling method
CN110161545B (en) * 2018-02-12 2022-04-15 清华大学 Positioning system and positioning signal generation method thereof
US11696279B2 (en) * 2020-03-31 2023-07-04 Qualcomm Incorporated Mitigating receive time difference when using a single beam in inter-band carrier aggregation
US11395252B2 (en) 2020-07-23 2022-07-19 Skyhook Wireless, Inc. Crowd sourced RTT-based positioning

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3673642D1 (en) 1986-04-11 1990-09-27 Ant Nachrichtentech METHOD FOR DETERMINING THE STAY RADIO CELL OF A MOBILE STATION WITHIN A MOBILE RADIO NETWORK.
US5440561A (en) 1991-09-30 1995-08-08 Motorola, Inc. Method for establishing frame synchronization within a TDMA communication system
EP0659326B1 (en) * 1993-06-14 2002-09-04 Telefonaktiebolaget Lm Ericsson Time alignment of transmission in a down-link of a cdma system
FR2739244B1 (en) * 1995-09-26 1997-11-14 Alcatel Mobile Comm France BASE STATION FOR CELLULAR MOBILE RADIOCOMMUNICATIONS SYSTEM AND SYSTEM FOR SYNCHRONIZING SUCH BASE STATIONS
AU733935B2 (en) 1996-06-06 2001-05-31 Qualcomm Incorporated Using a signal with increased power for determining the position of a mobile subscriber in a CDMA cellular telephone system
US5859612A (en) * 1996-06-06 1999-01-12 Qualcomm Incorporated Method for using an antenna with a rotating beam for determining the position of a mobile subscriber in a CDMA cellular telephone system
EP0845877A3 (en) * 1996-11-28 2002-03-27 Oki Electric Industry Co., Ltd. Mobile communication system for accomplishing handover with phase difference of frame sync signals corrected
JP2845228B2 (en) * 1996-12-10 1999-01-13 日本電気株式会社 Neighbor cell synchronization detection method
US5991330A (en) * 1997-06-27 1999-11-23 Telefonaktiebolaget L M Ericsson (Pub1) Mobile Station synchronization within a spread spectrum communication systems
US6307840B1 (en) * 1997-09-19 2001-10-23 Qualcomm Incorporated Mobile station assisted timing synchronization in CDMA communication system
US5872774A (en) * 1997-09-19 1999-02-16 Qualcomm Incorporated Mobile station assisted timing synchronization in a CDMA communication system
US6101175A (en) * 1997-10-31 2000-08-08 Motorola, Inc. Method and apparatus for handoff within a communication system
US6208871B1 (en) * 1998-02-27 2001-03-27 Motorola, Inc. Method and apparatus for providing a time adjustment to a wireless communication system
FI106494B (en) * 1998-11-05 2001-02-15 Nokia Networks Oy Ramsynkroniseringsmekanism
MXPA01008595A (en) * 1999-02-26 2002-03-14 Qualcomm Inc Method and system for handoff between an asynchronous cdma base station and a synchronous cdma base station.

Also Published As

Publication number Publication date
CN1296679A (en) 2001-05-23
AU2650899A (en) 1999-08-30
AU761795B2 (en) 2003-06-12
CA2320996C (en) 2009-01-20
BR9907857A (en) 2000-10-24
US6526039B1 (en) 2003-02-25
KR100602836B1 (en) 2006-07-19
AR018283A1 (en) 2001-11-14
EP1055295B1 (en) 2008-07-02
CN1126298C (en) 2003-10-29
EP1055295A1 (en) 2000-11-29
JP4373002B2 (en) 2009-11-25
DE69939008D1 (en) 2008-08-14
JP2002503913A (en) 2002-02-05
KR20010052164A (en) 2001-06-25
WO1999041854A1 (en) 1999-08-19

Similar Documents

Publication Publication Date Title
CA2320996A1 (en) Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system
CA2310006A1 (en) Mobile station positioning system and method in mobile communication system
CA2203475A1 (en) Method of synchronizing satellite switched cdma communication system
CA2397323A1 (en) Apparatus and method for measuring propagation delay in an nb-tdd cdma mobile communication system
WO1998006228A3 (en) Method of determining communications mode
CA2737848A1 (en) Method and apparatus for providing wireless communication system synchronization
TW361021B (en) Method and apparatus for providing diversity in hard handoff for a CDMA system
WO2002019569A1 (en) Data transmitting apparatus, radio communication system and radio communication method
CA2015237A1 (en) Multiplex communications network pseudo-synchronisation method
WO2000008706A3 (en) Device and method for controlling initial transmission power of forward link channel in mobile communications system
CA2304133A1 (en) Channel communication apparatus and method in cdma communication system
WO1999025125A3 (en) A method of synchronising radio signal transmission slots in packet radio telephone services
WO1999021375A3 (en) Random access in a mobile telecommunications system
TW200742313A (en) Improved path loss measurements in wireless communications
WO1999008451A3 (en) Synchronous wireless access protocol method and apparatus
WO2002059638A3 (en) Position determination in a wireless communication system with detection and compensation for repeaters
TW200503459A (en) System and method for setting the reverse link gain of repeaters in wireless communication systems
AU5440899A (en) Communication system
WO2001069947A3 (en) Method and system for fast access to an uplink channel in a mobile communications network
WO2000016437A3 (en) Device and method for performing frame sync using sync channel in mobile communication system
WO1998020627A3 (en) Method for propagation delay control
KR100946899B1 (en) Synchronization method for terminal-to-terminal direct communication in time division duplex mobile communication system
WO1999022527A3 (en) Method and arrangement for transmitting data over a radio interface in a radiocommunications system
WO2004034593A3 (en) Uplink power control using loopback communications carriers
JPH06224835A (en) Digital mobile radio communication system

Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20190211

MKEX Expiry

Effective date: 20190211