KR20050025582A - 무선 네트워크에서 클록 드리프트의 정정 및 동기의유지를 위한 시스템 및 방법 - Google Patents

무선 네트워크에서 클록 드리프트의 정정 및 동기의유지를 위한 시스템 및 방법 Download PDF

Info

Publication number
KR20050025582A
KR20050025582A KR1020057000177A KR20057000177A KR20050025582A KR 20050025582 A KR20050025582 A KR 20050025582A KR 1020057000177 A KR1020057000177 A KR 1020057000177A KR 20057000177 A KR20057000177 A KR 20057000177A KR 20050025582 A KR20050025582 A KR 20050025582A
Authority
KR
South Korea
Prior art keywords
clock
node
client
value
drift
Prior art date
Application number
KR1020057000177A
Other languages
English (en)
Korean (ko)
Inventor
존 엠 벨세아
Original Assignee
메시네트웍스, 인코포레이티드
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 메시네트웍스, 인코포레이티드 filed Critical 메시네트웍스, 인코포레이티드
Publication of KR20050025582A publication Critical patent/KR20050025582A/ko

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • H04W56/0015Synchronization between nodes one node acting as a reference for the others
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • H04J3/0635Clock or time synchronisation in a network
    • H04J3/0638Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0658Clock or time synchronisation among packet nodes
    • H04J3/0661Clock or time synchronisation among packet nodes using timestamps
    • H04J3/0667Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00Arrangements for synchronising receiver with transmitter
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/06Synchronising arrangements
    • H04J3/0635Clock or time synchronisation in a network
    • H04J3/0685Clock or time synchronisation in a node; Intranode synchronisation
    • H04J3/0697Synchronisation in a packet node
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/18Self-organising networks, e.g. ad-hoc networks or sensor networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Small-Scale Networks (AREA)
KR1020057000177A 2002-07-05 2003-07-03 무선 네트워크에서 클록 드리프트의 정정 및 동기의유지를 위한 시스템 및 방법 KR20050025582A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/188,982 US7072432B2 (en) 2002-07-05 2002-07-05 System and method for correcting the clock drift and maintaining the synchronization of low quality clocks in wireless networks
US10/188,982 2002-07-05

Publications (1)

Publication Number Publication Date
KR20050025582A true KR20050025582A (ko) 2005-03-14

Family

ID=29999584

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020057000177A KR20050025582A (ko) 2002-07-05 2003-07-03 무선 네트워크에서 클록 드리프트의 정정 및 동기의유지를 위한 시스템 및 방법

Country Status (9)

Country Link
US (1) US7072432B2 (US20040005902A1-20040108-P00001.png)
EP (1) EP1520365B1 (US20040005902A1-20040108-P00001.png)
JP (1) JP4224025B2 (US20040005902A1-20040108-P00001.png)
KR (1) KR20050025582A (US20040005902A1-20040108-P00001.png)
AT (1) ATE441984T1 (US20040005902A1-20040108-P00001.png)
AU (1) AU2003281454A1 (US20040005902A1-20040108-P00001.png)
CA (1) CA2490258A1 (US20040005902A1-20040108-P00001.png)
DE (1) DE60329102D1 (US20040005902A1-20040108-P00001.png)
WO (1) WO2004006493A1 (US20040005902A1-20040108-P00001.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150125245A (ko) * 2014-04-30 2015-11-09 주식회사 이에스엠연구소 다시점 카메라를 위한 분산 시스템에서 제어 신호 전달 방법 및 다시점 카메라를 위한 분산 시스템

Families Citing this family (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7221686B1 (en) * 2001-11-30 2007-05-22 Meshnetworks, Inc. System and method for computing the signal propagation time and the clock correction for mobile stations in a wireless network
US7200158B2 (en) * 2002-06-24 2007-04-03 Honeywell International Clock synchronizing method over fault-tolerant Ethernet
KR100758145B1 (ko) 2003-06-06 2007-09-13 메시네트웍스, 인코포레이티드 수신된 신호 강도 표시자 및 신호 전파 시간을 사용하여 도움이 필요한 소방관이 위치한 층 번호를 식별하기 위한 시스템 및 방법
US7286444B1 (en) * 2003-08-26 2007-10-23 United States Of America As Represented By The Secretary Of The Army Method and system for synchronizing separated clocks
US6885969B2 (en) * 2003-08-26 2005-04-26 Mitsubishi Electric Research Laboratories, Inc. Location estimation in partially synchronized networks
US7814188B2 (en) * 2003-12-16 2010-10-12 Honeywell International Inc. Synchronized wireless communications system
JP4442338B2 (ja) * 2004-02-06 2010-03-31 ソニー株式会社 無線通信システム、無線通信装置及び無線通信方法、並びにコンピュータ・プログラム
US7551892B1 (en) 2004-02-26 2009-06-23 Bbn Technologies Corp Low-power ad hoc network entry
US7684015B2 (en) * 2004-03-15 2010-03-23 University Of Maryland, Baltimore County System and method for clock synchronization and position determination using entangled photon pairs
FR2871006B1 (fr) 2004-05-28 2008-09-12 Thales Sa Procede et systeme de synchronisation distribuee
US7239626B2 (en) 2004-06-30 2007-07-03 Sharp Laboratories Of America, Inc. System clock synchronization in an ad hoc and infrastructure wireless networks
US7599398B1 (en) * 2004-07-01 2009-10-06 Cisco Technology, Inc. Method and apparatus for dynamically adjusting system timers in wireless networks to optimize connection performance
ATE426289T1 (de) * 2004-11-25 2009-04-15 Fraunhofer Ges Forschung Verfahren zur synchronisation und datenuebertragung
CN100379183C (zh) * 2004-11-30 2008-04-02 西安电子科技大学 移动无线自组织网络的互同步方法
GB0426446D0 (en) * 2004-12-02 2005-01-05 Koninkl Philips Electronics Nv Measuring the distance between devices
US8145201B2 (en) 2004-12-17 2012-03-27 Raytheon Bbn Technologies Corp. Methods and apparatus for reduced energy communication in an ad hoc network
JP4173141B2 (ja) * 2005-01-31 2008-10-29 沖電気工業株式会社 通信タイミング制御装置、通信タイミング制御方法、ノード及び通信システム
US7773569B2 (en) * 2005-05-19 2010-08-10 Meshnetworks, Inc. System and method for efficiently routing data packets and managing channel access and bandwidth in wireless multi-hopping networks
US7349362B2 (en) * 2005-06-29 2008-03-25 Meshnetworks, Inc. Method and system for implementing the time division multiple access method to AD-HOC multihopping wireless networks
US20070032245A1 (en) * 2005-08-05 2007-02-08 Alapuranen Pertti O Intelligent transportation system and method
US20070070983A1 (en) * 2005-09-28 2007-03-29 Bbn Technologies Corp. Methods and apparatus for improved efficiency communication
US7826374B2 (en) * 2005-12-19 2010-11-02 Trilliant Networks, Inc. Method and apparatus for efficient transfer of data over a network
US7571340B2 (en) * 2006-06-13 2009-08-04 Intel Corporation Eliminating receiver clock drift caused by voltage and temperature change in a high-speed I/O system that uses a forwarded clock
US7738611B2 (en) * 2006-08-07 2010-06-15 Harris Stratex Networks, Inc. Remote monitoring and calibration of system reference clock using network timing reference
US7924728B2 (en) * 2006-08-25 2011-04-12 Raytheon Bbn Technologies Corp Systems and methods for energy-conscious communication in wireless ad-hoc networks
US7729336B2 (en) 2007-03-28 2010-06-01 Harris Corporation Synchronization and timing source priority in an ad-hoc network
US20080240163A1 (en) * 2007-04-02 2008-10-02 Texas Instruments Incorporated System and method for maintaining transmission synchrony
US7974264B2 (en) * 2007-07-13 2011-07-05 Michael Rothschild Method and a system for determining the spatial location of nodes in a wireless network
US8149716B2 (en) 2007-08-20 2012-04-03 Raytheon Bbn Technologies Corp. Systems and methods for adaptive routing in mobile ad-hoc networks and disruption tolerant networks
US7961554B2 (en) * 2008-01-11 2011-06-14 Cellnet Innovations, Inc. Methods and systems for accurate time-keeping on metering and other network communication devices
EP2245772B1 (en) * 2008-02-19 2019-04-10 Innovative Concepts, Incorporated Mimo slotted aloha (msa) system
AU2014200874B2 (en) * 2008-02-19 2015-10-08 Innovative Concepts, Inc. Mimo slotted aloha (msa) system
ES2435553T3 (es) 2008-03-12 2013-12-20 Genelec Oy Método y sistema de transferencia de datos para altavoces en un sistema de reproducción de sonido digital
US8073976B2 (en) * 2008-03-27 2011-12-06 Microsoft Corporation Synchronizing clocks in an asynchronous distributed system
US8254293B2 (en) * 2008-05-28 2012-08-28 Nivis, Llc Methods and systems for location estimation
US8130146B2 (en) * 2008-07-29 2012-03-06 Motorola Solutions, Inc. Method for measuring the time of arrival of radio signals
US8107989B2 (en) * 2008-07-31 2012-01-31 Honeywell International, Inc. Apparatus and method for transmit power control in a wireless network
WO2010014875A1 (en) * 2008-08-01 2010-02-04 Nivis, Llc Systems and methods for regulating clock precision in distributed devices
WO2010014872A1 (en) * 2008-08-01 2010-02-04 Nivis, Llc Systems and methods for determining link quality
US8139489B2 (en) * 2008-08-06 2012-03-20 International Business Machines Corporation Robust jitter-free remote clock offset measuring method
US8699406B1 (en) 2009-05-13 2014-04-15 Dust Networks, Inc. Timing synchronization for wireless networks
KR101705592B1 (ko) * 2009-05-18 2017-02-10 삼성전자주식회사 노드 간의 시간 동기화를 수행하는 네트워크 동기화 방법 및 장치
US8533355B2 (en) 2009-11-02 2013-09-10 International Business Machines Corporation Techniques for improved clock offset measuring
US8121050B2 (en) * 2010-04-08 2012-02-21 Exelis Inc. Maintaining time of day synchronization
NL2006699A (en) 2010-06-03 2011-12-06 Asml Netherlands Bv Stage apparatus and lithographic apparatus comprising such stage apparatus.
EP2429105B1 (en) * 2010-09-13 2013-03-27 Ntt Docomo, Inc. Node in a wireless system with time and clock frequency synchronizing and corresponding method
WO2012095120A1 (de) * 2011-01-11 2012-07-19 Siemens Enterprise Communications Gmbh & Co.Kg Verfahren zur taktsynchronisation einer mehrzahl von baugruppen
EP2544387B1 (en) * 2011-07-04 2016-03-16 Mitsubishi Electric R&D Centre Europe B.V. Methods and devices for performing synchronization and compensating clock drift among communication devices
ES2503568T3 (es) * 2011-10-31 2014-10-07 Itron, Inc. Sincronización de los nodos en una red
US8737378B2 (en) 2011-10-31 2014-05-27 Itron, Inc. Synchronization of nodes in a network
US8867421B2 (en) 2012-04-12 2014-10-21 Gainspan Corporation Correction of clock errors in a wireless station to enable reduction of power consumption
DE102012209680A1 (de) * 2012-06-11 2013-12-12 Rohde & Schwarz Gmbh & Co. Kg Verfahren und mobiles ad-hoc-Netzwerk zur effektiven Identifizierung von benachbarten Knoten
US9651672B2 (en) * 2012-09-25 2017-05-16 Intel Corporation Systems and methods for time synchronization
US9226251B2 (en) 2012-11-30 2015-12-29 Qualcomm Incorporated Systems and methods for optimization of synchronization message transmission intervals in a peer-to-peer network
US9078050B2 (en) 2012-12-28 2015-07-07 Elster Solutions, Llc Techniques for clock recovery in a mobile information collection network following a power outage
JPWO2014174806A1 (ja) 2013-04-22 2017-02-23 株式会社Joled El表示装置の製造方法
JP2014238357A (ja) * 2013-06-10 2014-12-18 ソニー株式会社 受信装置、時刻差算出方法、およびプログラム
US9226253B2 (en) * 2013-12-04 2015-12-29 Mitsubishi Electric Research Laboratories, Inc. Passive synchronization in wireless networks
US9602270B2 (en) 2014-02-21 2017-03-21 Landis+Gyr Innovations, Inc. Clock drift compensation in a time synchronous channel hopping network
CN103874177B (zh) * 2014-03-27 2017-12-08 北京工业大学 基于移动参考节点的无线传感器网络实时同步方法
MX2016014037A (es) * 2014-05-08 2017-02-14 ERICSSON TELEFON AB L M (publ) Metodo y aparato para determinar el retardo de propagacion en una red de comunicaciones.
IN2015CH03249A (US20040005902A1-20040108-P00001.png) * 2015-06-27 2015-07-10 Wipro Ltd
US10069839B2 (en) 2016-02-11 2018-09-04 Microsoft Technology Licensing, Llc Determine approximate current time on a client using secure protocol metadata
US10298346B2 (en) * 2016-06-02 2019-05-21 Cisco Technology, Inc. Directed acyclic graph optimization based on timing information for generating optimized network clock
GB2551327B (en) * 2016-06-10 2020-02-19 Bluwireless Tech Ltd Clock synchronisation in wireless mesh communications networks
GB2551328B (en) * 2016-06-10 2020-02-19 Bluwireless Tech Ltd Clock synchronisation in wireless mesh communications networks
AU2018276459B2 (en) * 2017-06-02 2021-03-11 Sony Corporation Wireless device and processing method for wireless device
US10433197B2 (en) 2017-07-20 2019-10-01 Itron Networked Solutions, Inc. Compensating for oscillator drift in wireless mesh networks
US10849086B2 (en) 2017-07-20 2020-11-24 Itron Networked Solutions, Inc. Compensating for oscillator drift in wireless mesh networks
EP3656071A4 (en) * 2017-07-20 2021-04-21 Itron Networked Solutions, Inc. COMPENSATION OF THE OSCILLATOR DEVIATION IN WIRELESS MESH NETWORKS
JP7072078B2 (ja) * 2017-12-06 2022-05-19 テアテ オーユー 自己組織化ノード及び自己組織化ノードを有するセンサネットワーク
IL257997B (en) * 2018-03-08 2019-09-26 Connected Intelligence Systems Ltd Method and system for synchronizing a mesh network
US11836721B2 (en) * 2018-06-29 2023-12-05 Intel Corporation Protection of information in an information exchange
EP3813444A1 (en) * 2019-10-23 2021-04-28 Mitsubishi Electric R&D Centre Europe B.V. Synchronizing a connected node
JP7439474B2 (ja) 2019-11-25 2024-02-28 富士電機株式会社 プログラマブルコントローラシステムおよびモジュール
US11367014B2 (en) 2020-05-05 2022-06-21 Qubit Moving And Storage, Llc System and method for quantum cache
US11614771B2 (en) 2020-11-25 2023-03-28 Qubit Moving And Storage, Llc Method for synchronizing and locking clocks
US11616644B2 (en) 2020-11-25 2023-03-28 Qubit Moving And Storage, Llc System and method of verification and authentication using entangled photons
US12003626B2 (en) 2020-11-25 2024-06-04 Qubit Moving And Storage, Llc System and method of verification, authentication, and/or certification using entangled photons
US20230327779A1 (en) 2022-04-06 2023-10-12 Qubit Moving And Storage, Llc System and Method for Entangled State Identification Using Metadata
US11933608B2 (en) 2022-05-19 2024-03-19 Qubit Moving And Storage, Llc Quantum interferometer with improved entangled photon identification
US12007272B2 (en) 2022-10-15 2024-06-11 Qubit Moving And Storage, Llc Entangled photon identification system and method for quantum optical measurement

Family Cites Families (108)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4910521A (en) 1981-08-03 1990-03-20 Texas Instruments Incorporated Dual band communication receiver
US4494192A (en) 1982-07-21 1985-01-15 Sperry Corporation High speed bus architecture
JPS59115633A (ja) 1982-12-22 1984-07-04 Toshiba Corp 情報伝送方式
US4677614A (en) * 1983-02-15 1987-06-30 Emc Controls, Inc. Data communication system and method and communication controller and method therefor, having a data/clock synchronizer and method
US4675863A (en) 1985-03-20 1987-06-23 International Mobile Machines Corp. Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
US4747130A (en) 1985-12-17 1988-05-24 American Telephone And Telegraph Company, At&T Bell Laboratories Resource allocation in distributed control systems
CA1261080A (en) 1985-12-30 1989-09-26 Shunichiro Tejima Satellite communications system with random multiple access and time slot reservation
US4742357A (en) 1986-09-17 1988-05-03 Rackley Ernie C Stolen object location system
GB2229064B (en) 1987-06-11 1990-12-12 Software Sciences Limited An area communications system
US5210846B1 (en) 1989-05-15 1999-06-29 Dallas Semiconductor One-wire bus architecture
US5555425A (en) 1990-03-07 1996-09-10 Dell Usa, L.P. Multi-master bus arbitration system in which the address and data lines of the bus may be separately granted to individual masters
US5068916A (en) 1990-10-29 1991-11-26 International Business Machines Corporation Coordination of wireless medium among a plurality of base stations
US5369748A (en) 1991-08-23 1994-11-29 Nexgen Microsystems Bus arbitration in a dual-bus architecture where one bus has relatively high latency
US5241542A (en) 1991-08-23 1993-08-31 International Business Machines Corporation Battery efficient operation of scheduled access protocol
US5386542A (en) 1991-10-31 1995-01-31 International Business Machines Corporation System for generating a time reference value in the MAC layer of an ISO/OSI communications model among a plurality of nodes
DE4140017C2 (de) 1991-12-04 1995-01-05 Nec Electronics Germany Verfahren zum Betreiben von über einen Datenbus durch seriellen Datenaustausch miteinander kommunizierenden Rechnereinheiten
US5231634B1 (en) 1991-12-18 1996-04-02 Proxim Inc Medium access protocol for wireless lans
US5392450A (en) 1992-01-08 1995-02-21 General Electric Company Satellite communications system
US5896561A (en) 1992-04-06 1999-04-20 Intermec Ip Corp. Communication network having a dormant polling protocol
FR2690252B1 (fr) 1992-04-17 1994-05-27 Thomson Csf Procede et systeme de determination de la position et de l'orientation d'un mobile, et applications.
US5233604A (en) 1992-04-28 1993-08-03 International Business Machines Corporation Methods and apparatus for optimum path selection in packet transmission networks
GB9304638D0 (en) 1993-03-06 1993-04-21 Ncr Int Inc Wireless data communication system having power saving function
US5696903A (en) 1993-05-11 1997-12-09 Norand Corporation Hierarchical communications system using microlink, data rate switching, frequency hopping and vehicular local area networking
US5408506A (en) 1993-07-09 1995-04-18 Apple Computer, Inc. Distributed time synchronization system and method
US5317566A (en) 1993-08-18 1994-05-31 Ascom Timeplex Trading Ag Least cost route selection in distributed digital communication networks
US5631897A (en) 1993-10-01 1997-05-20 Nec America, Inc. Apparatus and method for incorporating a large number of destinations over circuit-switched wide area network connections
US5857084A (en) 1993-11-02 1999-01-05 Klein; Dean A. Hierarchical bus structure access system
US5412654A (en) 1994-01-10 1995-05-02 International Business Machines Corporation Highly dynamic destination-sequenced destination vector routing for mobile computers
JP2591467B2 (ja) 1994-04-18 1997-03-19 日本電気株式会社 アクセス方式
US5502722A (en) 1994-08-01 1996-03-26 Motorola, Inc. Method and apparatus for a radio system using variable transmission reservation
JP3043958B2 (ja) 1994-09-29 2000-05-22 株式会社リコー 無線通信によるネットワーク通信方式
US6029217A (en) 1994-10-03 2000-02-22 International Business Machines Corporation Queued arbitration mechanism for data processing system
EP0709982B1 (en) 1994-10-26 2004-06-30 International Business Machines Corporation Medium access control scheme for wireless LAN using a variable length interleaved time division frame
US5535217A (en) 1994-12-20 1996-07-09 International Business Machines Corporation Method and apparatus for probabilistic clock synchronization with interval arithmetic
US5618045A (en) 1995-02-08 1997-04-08 Kagan; Michael Interactive multiple player game system and method of playing a game between at least two players
US5555540A (en) 1995-02-17 1996-09-10 Sun Microsystems, Inc. ASIC bus structure
US5796741A (en) 1995-03-09 1998-08-18 Nippon Telegraph And Telephone Corporation ATM bus system
US5572528A (en) 1995-03-20 1996-11-05 Novell, Inc. Mobile networking method and apparatus
US5886992A (en) 1995-04-14 1999-03-23 Valtion Teknillinen Tutkimuskeskus Frame synchronized ring system and method
US5517491A (en) 1995-05-03 1996-05-14 Motorola, Inc. Method and apparatus for controlling frequency deviation of a portable transceiver
US5822309A (en) 1995-06-15 1998-10-13 Lucent Technologies Inc. Signaling and control architecture for an ad-hoc ATM LAN
US5623495A (en) 1995-06-15 1997-04-22 Lucent Technologies Inc. Portable base station architecture for an AD-HOC ATM lan
US5781540A (en) 1995-06-30 1998-07-14 Hughes Electronics Device and method for communicating in a mobile satellite system
GB2303763B (en) 1995-07-26 2000-02-16 Motorola Israel Ltd Communications system and method of operation
US5907685A (en) 1995-08-04 1999-05-25 Microsoft Corporation System and method for synchronizing clocks in distributed computer nodes
GB9517943D0 (en) 1995-09-02 1995-11-01 At & T Corp Radio communication device and method
US6132306A (en) 1995-09-06 2000-10-17 Cisco Systems, Inc. Cellular communication system with dedicated repeater channels
US6192053B1 (en) 1995-09-07 2001-02-20 Wireless Networks, Inc. Enhanced adjacency detection protocol for wireless applications
US5615212A (en) 1995-09-11 1997-03-25 Motorola Inc. Method, device and router for providing a contention-based reservation mechanism within a mini-slotted dynamic entry polling slot supporting multiple service classes
US5805593A (en) 1995-09-26 1998-09-08 At&T Corp Routing method for setting up a service between an origination node and a destination node in a connection-communications network
US5805842A (en) 1995-09-26 1998-09-08 Intel Corporation Apparatus, system and method for supporting DMA transfers on a multiplexed bus
US5701294A (en) 1995-10-02 1997-12-23 Telefonaktiebolaget Lm Ericsson System and method for flexible coding, modulation, and time slot allocation in a radio telecommunications network
US5717689A (en) 1995-10-10 1998-02-10 Lucent Technologies Inc. Data link layer protocol for transport of ATM cells over a wireless link
US5920821A (en) 1995-12-04 1999-07-06 Bell Atlantic Network Services, Inc. Use of cellular digital packet data (CDPD) communications to convey system identification list data to roaming cellular subscriber stations
US5991279A (en) 1995-12-07 1999-11-23 Vistar Telecommunications Inc. Wireless packet data distributed communications system
US5878036A (en) 1995-12-20 1999-03-02 Spartz; Michael K. Wireless telecommunications system utilizing CDMA radio frequency signal modulation in conjunction with the GSM A-interface telecommunications network protocol
KR100197407B1 (ko) 1995-12-28 1999-06-15 유기범 전전자 교환기에 있어서 프로세서들간 통신버스구조
US5680392A (en) 1996-01-16 1997-10-21 General Datacomm, Inc. Multimedia multipoint telecommunications reservation systems
US5684794A (en) 1996-01-25 1997-11-04 Hazeltine Corporation Validation of subscriber signals in a cellular radio network
US5706428A (en) 1996-03-14 1998-01-06 Lucent Technologies Inc. Multirate wireless data communication system
US5652751A (en) 1996-03-26 1997-07-29 Hazeltine Corporation Architecture for mobile radio networks with dynamically changing topology using virtual subnets
US5796732A (en) 1996-03-28 1998-08-18 Cisco Technology, Inc. Architecture for an expandable transaction-based switching bus
US5805977A (en) 1996-04-01 1998-09-08 Motorola, Inc. Method and apparatus for controlling transmissions in a two-way selective call communication system
US5943322A (en) 1996-04-24 1999-08-24 Itt Defense, Inc. Communications method for a code division multiple access system without a base station
US5787080A (en) 1996-06-03 1998-07-28 Philips Electronics North America Corporation Method and apparatus for reservation-based wireless-ATM local area network
US5845097A (en) 1996-06-03 1998-12-01 Samsung Electronics Co., Ltd. Bus recovery apparatus and method of recovery in a multi-master bus system
SE518132C2 (sv) 1996-06-07 2002-08-27 Ericsson Telefon Ab L M Metod och anordning för synkronisering av kombinerade mottagare och sändare i ett cellulärt system
US5774876A (en) 1996-06-26 1998-06-30 Par Government Systems Corporation Managing assets with active electronic tags
US5844905A (en) 1996-07-09 1998-12-01 International Business Machines Corporation Extensions to distributed MAC protocols with collision avoidance using RTS/CTS exchange
US5909651A (en) 1996-08-02 1999-06-01 Lucent Technologies Inc. Broadcast short message service architecture
US5987011A (en) 1996-08-30 1999-11-16 Chai-Keong Toh Routing method for Ad-Hoc mobile networks
US6044062A (en) 1996-12-06 2000-03-28 Communique, Llc Wireless network system and method for providing same
US5903559A (en) 1996-12-20 1999-05-11 Nec Usa, Inc. Method for internet protocol switching over fast ATM cell transport
US5877724A (en) 1997-03-25 1999-03-02 Trimble Navigation Limited Combined position locating and cellular telephone system with a single shared microprocessor
US6073005A (en) 1997-04-22 2000-06-06 Ericsson Inc. Systems and methods for identifying emergency calls in radiocommunication systems
US6052594A (en) 1997-04-30 2000-04-18 At&T Corp. System and method for dynamically assigning channels for wireless packet communications
US5881095A (en) 1997-05-01 1999-03-09 Motorola, Inc. Repeater assisted channel hopping system and method therefor
TW375529B (en) * 1997-05-14 1999-12-01 Sega Corp Data transmission method and game system using the same
US5870350A (en) 1997-05-21 1999-02-09 International Business Machines Corporation High performance, high bandwidth memory bus architecture utilizing SDRAMs
US6240294B1 (en) 1997-05-30 2001-05-29 Itt Manufacturing Enterprises, Inc. Mobile radio device having adaptive position transmitting capabilities
GB2326065B (en) 1997-06-05 2002-05-29 Mentor Graphics Corp A scalable processor independent on-chip bus
US6108738A (en) 1997-06-10 2000-08-22 Vlsi Technology, Inc. Multi-master PCI bus system within a single integrated circuit
US5987033A (en) 1997-09-08 1999-11-16 Lucent Technologies, Inc. Wireless lan with enhanced capture provision
US6163699A (en) 1997-09-15 2000-12-19 Ramot University Authority For Applied Research And Industrial Development Ltd. Adaptive threshold scheme for tracking and paging mobile users
US6067291A (en) 1997-09-23 2000-05-23 Lucent Technologies Inc. Wireless local area network with enhanced carrier sense provision
US6034542A (en) 1997-10-14 2000-03-07 Xilinx, Inc. Bus structure for modularized chip with FPGA modules
US5936953A (en) 1997-12-18 1999-08-10 Raytheon Company Multi-mode, multi-channel communication bus
US6047330A (en) 1998-01-20 2000-04-04 Netscape Communications Corporation Virtual router discovery system
US6157957A (en) 1998-01-22 2000-12-05 Cisco Technology, Inc. Clock synchronization system and method using a continuous conversion function for a communication network
US6065085A (en) 1998-01-27 2000-05-16 Lsi Logic Corporation Bus bridge architecture for a data processing system capable of sharing processing load among a plurality of devices
GB2353450B (en) * 1998-03-25 2001-09-12 Alstom Uk Ltd Method for detecting processor-clock drift in a communication system
US6130881A (en) 1998-04-20 2000-10-10 Sarnoff Corporation Traffic routing in small wireless data networks
US6078566A (en) 1998-04-28 2000-06-20 Genesys Telecommunications Laboratories, Inc. Noise reduction techniques and apparatus for enhancing wireless data network telephony
US6400683B1 (en) * 1998-04-30 2002-06-04 Cisco Technology, Inc. Adaptive clock recovery in asynchronous transfer mode networks
US6064626A (en) 1998-07-31 2000-05-16 Arm Limited Peripheral buses for integrated circuit
US6304556B1 (en) 1998-08-24 2001-10-16 Cornell Research Foundation, Inc. Routing and mobility management protocols for ad-hoc networks
US6115580A (en) 1998-09-08 2000-09-05 Motorola, Inc. Communications network having adaptive network link optimization using wireless terrain awareness and method for use therein
US6208870B1 (en) 1998-10-27 2001-03-27 Lucent Technologies Inc. Short message service notification forwarded between multiple short message service centers
US6285892B1 (en) 1998-11-24 2001-09-04 Philips Electronics North America Corp. Data transmission system for reducing terminal power consumption in a wireless network
US6104712A (en) 1999-02-22 2000-08-15 Robert; Bruno G. Wireless communication network including plural migratory access nodes
US6147975A (en) 1999-06-02 2000-11-14 Ac Properties B.V. System, method and article of manufacture of a proactive threhold manager in a hybrid communication system architecture
US6275707B1 (en) 1999-10-08 2001-08-14 Motorola, Inc. Method and apparatus for assigning location estimates from a first transceiver to a second transceiver
US6349091B1 (en) * 1999-11-12 2002-02-19 Itt Manufacturing Enterprises, Inc. Method and apparatus for controlling communication links between network nodes to reduce communication protocol overhead traffic
US6349210B1 (en) * 1999-11-12 2002-02-19 Itt Manufacturing Enterprises, Inc. Method and apparatus for broadcasting messages in channel reservation communication systems
US7103124B1 (en) 1999-12-30 2006-09-05 Telefonaktiebolaget Lm Ericsson (Publ) Synchronization of nodes
US6839547B2 (en) * 2000-03-30 2005-01-04 Cellguide Ltd. Enhanced GPS receiver utilizing wireless infrastructure
US6873839B2 (en) 2000-11-13 2005-03-29 Meshnetworks, Inc. Prioritized-routing for an ad-hoc, peer-to-peer, mobile radio access system
US7047435B2 (en) * 2000-12-19 2006-05-16 Siemens Corporate Research, Inc. System and method for clock-synchronization in distributed systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150125245A (ko) * 2014-04-30 2015-11-09 주식회사 이에스엠연구소 다시점 카메라를 위한 분산 시스템에서 제어 신호 전달 방법 및 다시점 카메라를 위한 분산 시스템

Also Published As

Publication number Publication date
EP1520365A1 (en) 2005-04-06
DE60329102D1 (de) 2009-10-15
ATE441984T1 (de) 2009-09-15
CA2490258A1 (en) 2004-01-15
AU2003281454A1 (en) 2004-01-23
WO2004006493A1 (en) 2004-01-15
JP4224025B2 (ja) 2009-02-12
US20040005902A1 (en) 2004-01-08
EP1520365A4 (en) 2007-04-11
EP1520365B1 (en) 2009-09-02
US7072432B2 (en) 2006-07-04
JP2005536919A (ja) 2005-12-02

Similar Documents

Publication Publication Date Title
KR20050025582A (ko) 무선 네트워크에서 클록 드리프트의 정정 및 동기의유지를 위한 시스템 및 방법
JP4810169B2 (ja) 無線通信ネットワークにおいて送信機の送信クロックと受信機の受信クロックとを同期させるための方法
US10284359B2 (en) Clock synchronization frequency offset estimation method adapted to WIA-PA network
KR20100131015A (ko) 시분할 다중 접속 방법을 애드-혹 멀티호핑 무선 네트워크에 구현하는 방법 및 시스템
Jasperneite et al. Enhancements to the time synchronization standard IEEE-1588 for a system of cascaded bridges
EP2429105B1 (en) Node in a wireless system with time and clock frequency synchronizing and corresponding method
JP2004186877A (ja) 無線アクセスネットワークシステム、無線通信方法、同期サーバ及びノード装置
US20130155945A1 (en) Methods And Apparatus For Communication Synchronization
US9651984B2 (en) Feed-forward time transfer mechanism for time synchronization
JP2014238357A (ja) 受信装置、時刻差算出方法、およびプログラム
US7440474B1 (en) Method and apparatus for synchronizing clocks on packet-switched networks
JP2007184687A (ja) 伝搬遅延時間測定方法、同期方法、及び無線lanシステム
JP4467478B2 (ja) 伝送装置および時刻同期方法
Lennvall et al. A new wireless sensor network TDMA timing synchronization protocol
Krummacker et al. Intra-network clock synchronization for wireless networks: From state of the art systems to an improved solution
WO2018098791A1 (zh) 适用于多跳无线传感器网络的时钟同步频率偏移估计方法
Zhou et al. A scalable and adaptive clock synchronization protocol for IEEE 802.11-based multihop ad hoc networks
CN106162856A (zh) 一种无线AdHoc网络中的节点同步方法
König et al. Maintaining constructive interference using well-synchronized sensor nodes
Lam et al. An improved precision time protocol for industrial WLAN communication systems
Diarra et al. Improved clock synchronization start-up time for Ethernet AVB-based in-vehicle networks
EP2627040B1 (en) Method for eliminating systematical error components in a set of one-way delay measurement results for communications between two or more computing systems in a communication network, apparatus for performing the method and computer program product
CN108924922A (zh) 一种wsn簇型拓扑的链同步时间同步方法
KR20100048124A (ko) 근거리 통신망에서의 시간 동기화 방법
Zhou et al. On the scalability of IEEE 802.11 ad-hoc-mode timing synchronization function

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application