WO2013090246A1 - Systems and methods for time synchronization of ieds via radio link - Google Patents

Systems and methods for time synchronization of ieds via radio link Download PDF

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Publication number
WO2013090246A1
WO2013090246A1 PCT/US2012/068915 US2012068915W WO2013090246A1 WO 2013090246 A1 WO2013090246 A1 WO 2013090246A1 US 2012068915 W US2012068915 W US 2012068915W WO 2013090246 A1 WO2013090246 A1 WO 2013090246A1
Authority
WO
WIPO (PCT)
Prior art keywords
led
time signal
time
signal
ied
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.)
Ceased
Application number
PCT/US2012/068915
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English (en)
French (fr)
Inventor
Shankar V. ACHANTA
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.)
Schweitzer Engineering Laboratories Inc
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Schweitzer Engineering Laboratories 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 Schweitzer Engineering Laboratories Inc filed Critical Schweitzer Engineering Laboratories Inc
Priority to AU2012352497A priority Critical patent/AU2012352497A1/en
Priority to MX2014005686A priority patent/MX2014005686A/es
Priority to BR112014014512A priority patent/BR112014014512A2/pt
Priority to ES201490048A priority patent/ES2523703B1/es
Priority to IN879KON2014 priority patent/IN2014KN00879A/en
Priority to CA2856444A priority patent/CA2856444A1/en
Publication of WO2013090246A1 publication Critical patent/WO2013090246A1/en
Priority to ZA2014/03947A priority patent/ZA201403947B/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • H04J3/0658—Clock or time synchronisation among packet nodes
    • H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
    • H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays

Definitions

  • a computer may include a processor, such as a microprocessor,
  • Suitable networks for configuration and/or use, as described herein, include any of a wide variety of network infrastructures. Specifically, a network may incorporate landlines, wireless communication, optical connections, various modulators,
  • FIG. 1 illustrates an embodiment of a network 100 of intelligent electronic devices (lEDs) in communication with one another via radio links and/or via direct connections.
  • remote substations 120, 130, 140, and 150 may be in communication with a control center 1 10.
  • Control center 1 10 may include lEDs 1 1 1 , 1 12, and 1 13 in communication with one another.
  • lEDs 1 1 1 , 1 12, and 1 13 may be configured to monitor, protect, and/or control components in an electric power delivery system.
  • lEDs 1 1 1 , 1 12, and 1 13 may be configured to communicate time-sensitive data with each other, such as synchrophasors.
  • idelay is the propagation delay of the signal transmitted from the master lED to the remote lED.
  • the propagation delay is equal to one half of the difference between when the time the response from the remote lED is received, t , and when the master lED transmitted the original query, , less the processing delay ( 3 - 2) of the remote lED.
  • the processing delay may be omitted and/or approximated.
  • FIG. 3C illustrates a diagram 375 of an embodiment of the synchronization of a remote lED (right side) with a master lED (left side) via a radio signal in which the remote lED does not compensate for propagation and/or processing delays.
  • the master lED is associated with a time receiver that receives a common time signal as described herein.
  • the common time signal may provide a common time reference such as a pulse-per second (PPS).
  • PPS pulse-per second
  • the master IED may use a time signal from the time receiver to create its own reference such as a PPS.
  • the IED may provide a common time signal including a PPS to the radio transceiver.
  • an independent time source receiver module 589 may be configured to receive an independent time signal trusted as providing an accurate global time signal. Remote lEDs and master lEDs may synchronize the time signal maintained by their respective time signal modules 581 with an independent time signal received by independent time receiver module 589.
  • independent time source receiver module 589 may be configured to receive a time signal from a global positioning system or other accurate time source.
  • independent time source receiver module 589 may receive a time signal from a time source, such as a VCTCXO, a phase locked loop oscillator, a time locked loop oscillator, a rubidium oscillator, a cesium oscillator, a
  • a time source such as a VCTCXO, a phase locked loop oscillator, a time locked loop oscillator, a rubidium oscillator, a cesium oscillator, a
  • MEM microelectromechanical device

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Electric Clocks (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
PCT/US2012/068915 2011-12-15 2012-12-11 Systems and methods for time synchronization of ieds via radio link Ceased WO2013090246A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
AU2012352497A AU2012352497A1 (en) 2011-12-15 2012-12-11 Systems and methods for time synchronization of IEDs via radio link
MX2014005686A MX2014005686A (es) 2011-12-15 2012-12-11 Sistemas y metodos para sincronizacion de tiempo de los ied por medio de enlace de radio.
BR112014014512A BR112014014512A2 (pt) 2011-12-15 2012-12-11 dispositivo eletrônico inteligente, e, método para sincronizar um primeiro e um segundo dispositivo eletrônico inteligente
ES201490048A ES2523703B1 (es) 2011-12-15 2012-12-11 Sistemas y métodos para sincronización de tiempo de ied mediante enlace de radio
IN879KON2014 IN2014KN00879A (enExample) 2011-12-15 2012-12-11
CA2856444A CA2856444A1 (en) 2011-12-15 2012-12-11 Systems and methods for time synchronization of ieds via radio link
ZA2014/03947A ZA201403947B (en) 2011-12-15 2014-05-29 Systems and methods for time synchronization of ieds via radio link

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/327,531 2011-12-15
US13/327,531 US9590411B2 (en) 2011-12-15 2011-12-15 Systems and methods for time synchronization of IEDs via radio link

Publications (1)

Publication Number Publication Date
WO2013090246A1 true WO2013090246A1 (en) 2013-06-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/068915 Ceased WO2013090246A1 (en) 2011-12-15 2012-12-11 Systems and methods for time synchronization of ieds via radio link

Country Status (9)

Country Link
US (1) US9590411B2 (enExample)
AU (1) AU2012352497A1 (enExample)
BR (1) BR112014014512A2 (enExample)
CA (1) CA2856444A1 (enExample)
ES (1) ES2523703B1 (enExample)
IN (1) IN2014KN00879A (enExample)
MX (1) MX2014005686A (enExample)
WO (1) WO2013090246A1 (enExample)
ZA (1) ZA201403947B (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103579948A (zh) * 2013-11-28 2014-02-12 国家电网公司 整合型电力变压器智能组件
WO2016103227A1 (en) * 2014-12-24 2016-06-30 Abb Technology Ltd. A method for time synchronization of devices in a control network

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9590411B2 (en) 2011-12-15 2017-03-07 Schweitzer Engineering Laboratories, Inc. Systems and methods for time synchronization of IEDs via radio link
US9709680B2 (en) 2012-09-08 2017-07-18 Schweitzer Engineering Laboratories, Inc. Quality of precision time sources
US9400330B2 (en) 2012-10-19 2016-07-26 Schweitzer Engineering Laboratories, Inc. Manipulation resilient time distribution network
US9599719B2 (en) 2012-10-19 2017-03-21 Schweitzer Engineering Laboratories, Inc. Detection of manipulated satellite time signals
US9520860B2 (en) 2012-10-19 2016-12-13 Schweitzer Engineering Laboratories, Inc. Time distribution switch
ES2547028R1 (es) 2012-10-19 2015-12-02 Schweitzer Engineering Laboratories, Inc. Dispositivo de distribución de tiempo con antena multibanda
US9759816B2 (en) 2013-01-11 2017-09-12 Schweitzer Engineering Laboratories, Inc. Multi-constellation GNSS integrity check for detection of time signal manipulation
US9709682B2 (en) 2013-05-06 2017-07-18 Schweitzer Engineering Laboratories, Inc. Multi-constellation GNSS integrity check for detection of time signal manipulation
US9083503B2 (en) 2013-05-02 2015-07-14 Schweitzer Engineering Laboratories, Inc. Synchronized clock event report
US9319100B2 (en) 2013-08-12 2016-04-19 Schweitzer Engineering Laboratories, Inc. Delay compensation for variable cable length
JP6327866B2 (ja) * 2014-01-28 2018-05-23 東芝エネルギーシステムズ株式会社 保護リレー装置および保護システム
US9270442B2 (en) * 2014-04-29 2016-02-23 Schweitzer Engineering Laboratories, Inc. Time signal propagation delay correction
US9425652B2 (en) 2014-06-16 2016-08-23 Schweitzer Engineering Laboratories, Inc. Adaptive holdover timing error estimation and correction
US9813173B2 (en) * 2014-10-06 2017-11-07 Schweitzer Engineering Laboratories, Inc. Time signal verification and distribution
KR101596756B1 (ko) * 2014-11-03 2016-03-07 현대자동차주식회사 리던던트 그랜드마스터를 이용한 차량 내 네트워크 시간 동기화 제공 방법 및 장치
US10534090B2 (en) 2015-03-19 2020-01-14 Mitsubishi Electric Corporation Process bus-applied protection system
US10474119B2 (en) * 2015-09-15 2019-11-12 Rockwell Automation Technologies, Inc. Industrial automation packaged power solution for intelligent motor control and intelligent switchgear with energy management
US10303127B2 (en) 2015-09-15 2019-05-28 Rockwell Automation Technologies, Inc. Apparatus to interface process automation and electrical automation systems
US10021661B2 (en) 2015-11-24 2018-07-10 At&T Mobility Ii Llc Meshed GPS time synchronized network
US10375108B2 (en) 2015-12-30 2019-08-06 Schweitzer Engineering Laboratories, Inc. Time signal manipulation and spoofing detection based on a latency of a communication system
US10527732B2 (en) 2017-02-09 2020-01-07 Schweitzer Engineering Laboratories, Inc. Verification of time sources
US11630424B2 (en) 2018-07-13 2023-04-18 Schweitzer Engineering Laboratories, Inc. Time signal manipulation detection using remotely managed time
US11121551B2 (en) * 2018-08-23 2021-09-14 Smart Wires Inc. Modular time synchronized injection modules
US10819727B2 (en) 2018-10-15 2020-10-27 Schweitzer Engineering Laboratories, Inc. Detecting and deterring network attacks
US10912104B2 (en) 2019-02-01 2021-02-02 Schweitzer Engineering Laboratories, Inc. Interleaved, static time division multiple access (TDMA) for minimizing power usage in delay-sensitive applications
EP3703241B1 (en) 2019-02-26 2022-07-13 Hitachi Energy Switzerland AG Communication in a converter device
EP3859926A1 (en) 2020-01-31 2021-08-04 ABB Power Grids Switzerland AG Time synchronization between ieds of different substations
US11360505B2 (en) * 2020-02-11 2022-06-14 Simmonds Precision Products, Inc. Distributed network time synchronization
CN113840321B (zh) * 2020-06-24 2024-01-30 大唐移动通信设备有限公司 一种信息指示方法、装置及通信设备
US12418351B2 (en) 2022-03-31 2025-09-16 Jio Platforms Limited System and design method of a clock synchronizer for a combined centralized and distributed unit
US12449550B2 (en) 2023-03-22 2025-10-21 Schweitzer Engineering Laboratories, Inc. GNSS authentication through multi-site observables and data comparisons
US12556358B2 (en) 2024-01-02 2026-02-17 Schweitzer Engineering Laboratories, Inc. Adaptive clock offset estimation for protection devices without time-based synchronization

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5537143A (en) * 1992-08-14 1996-07-16 Steingold; Harold Interactive communication system
US6061573A (en) * 1997-02-21 2000-05-09 Motorola, Inc. Method and apparatus in a radio communication system for synchronizing transmissions while maintaining full user traffic
US6940931B2 (en) * 2000-09-05 2005-09-06 Yamaha Corporation Clock-synchronism evaluating apparatus and method
US20090310570A1 (en) * 2008-06-16 2009-12-17 Rivada Networks Llc Method and Systems Providing Peer-to-Peer Direct-Mode-Only Communications on CDMA Mobile Devices
US7714735B2 (en) * 2005-09-13 2010-05-11 Daniel Rockwell Monitoring electrical assets for fault and efficiency correction
US7746269B2 (en) * 2007-05-31 2010-06-29 Kabushiki Kaisha Toshiba DME ground apparatus
US7986270B2 (en) * 2006-02-27 2011-07-26 Olympus Corporation Clock phase ranging methods and systems

Family Cites Families (85)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5160926A (en) 1989-06-28 1992-11-03 Schweitzer Engineering Laboratories, Inc. Display transducer apparatus
US6694270B2 (en) 1994-12-30 2004-02-17 Power Measurement Ltd. Phasor transducer apparatus and system for protection, control, and management of electricity distribution systems
US5557284A (en) 1995-02-03 1996-09-17 Honeywell Inc. Spoofing detection system for a satellite positioning system
US5959980A (en) * 1995-06-05 1999-09-28 Omnipoint Corporation Timing adjustment control for efficient time division duplex communication
US5737715A (en) 1996-04-23 1998-04-07 Hughes Electronics Frequency normalization utilizing GPS pulse time and time interval signal
US5995911A (en) 1997-02-12 1999-11-30 Power Measurement Ltd. Digital sensor apparatus and system for protection, control, and management of electricity distribution systems
US5914685A (en) 1997-04-25 1999-06-22 Magellan Corporation Relative position measuring techniques using both GPS and GLONASS carrier phase measurements
JP3180735B2 (ja) * 1997-10-22 2001-06-25 松下電器産業株式会社 送信タイミング補正機能付き無線端末及びその製造方法
US6999440B2 (en) * 1997-10-22 2006-02-14 Matsushita Electric Industrial Co., Ltd. TDMA radio terminal capable of adjusting transmit timing by using measured delay time
US6144334A (en) 1998-02-26 2000-11-07 Analytical Graphics, Inc. Method and apparatus for calculating access between satellite constellations and ground targets
US6483856B1 (en) 1998-07-29 2002-11-19 Trimble Navigation Limited GPS synchronized data communications link
US6463092B1 (en) 1998-09-10 2002-10-08 Silicon Image, Inc. System and method for sending and receiving data signals over a clock signal line
US7375683B2 (en) 1999-03-05 2008-05-20 Era Systems Corporation Use of geo-stationary satellites to augment wide— area multilateration synchronization
DE19914600A1 (de) 1999-03-30 2000-10-05 Bosch Gmbh Robert Verfahren zur Synchronisation
DE10013348A1 (de) 2000-03-17 2001-09-20 Abb Research Ltd Zeitsynchronisation von Einheiten einer Anlage
AU4985701A (en) * 2000-04-06 2001-10-23 Interdigital Tech Corp Synchronization of timing advance and deviation
US6778136B2 (en) 2001-12-13 2004-08-17 Sirf Technology, Inc. Fast acquisition of GPS signal
GB2366971A (en) 2000-09-13 2002-03-20 Marconi Comm Ltd Bit and frame synchronisation
US6472943B1 (en) 2000-12-21 2002-10-29 Telefonaktie Bolaget L.M. Ericsson Oscillating circuit and method for calibrating same
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
GB2379581B (en) 2001-09-11 2005-08-31 Nec Technologies Apparatus and method of compensation for signal time-of-arrival variation in a UMTS handset
US20030084190A1 (en) * 2001-10-25 2003-05-01 Kimball Robert H. Apparatus and system for maintaining accurate time in a wireless environment
AUPR863401A0 (en) * 2001-11-02 2001-11-29 Qx Corporation Pty Ltd A method & device for precision time-lock
DE10248052B4 (de) 2002-10-15 2009-12-24 Infineon Technologies Ag Vorrichtung und Verfahren zum Nachführen eines Abtastzeitpunktes in Funkempfängern
US7146516B2 (en) 2002-12-20 2006-12-05 Invensys Systems, Inc. Time synchronization schemes wherein at least one data message associates a hardware pulse with a future time
US7363009B2 (en) * 2003-02-03 2008-04-22 Qualcomm Incorporated Method and apparatus for determining propagation delays for use in wide area networks
US7174133B2 (en) 2003-05-16 2007-02-06 Agilent Technologies, Inc. Systems and methods for determining the delay offsets of communication systems
ITMI20031217A1 (it) 2003-06-17 2004-12-18 Atmel Corp Ripetitore rigenerativo di temporizzazione
US7272201B2 (en) 2003-08-20 2007-09-18 Schweitzer Engineering Laboratories, Inc. System for synchronous sampling and time-of-day clocking using an encoded time signal
US8138972B2 (en) 2003-09-02 2012-03-20 Csr Technology Inc. Signal processing system for satellite positioning signals
US7266713B2 (en) 2004-01-09 2007-09-04 Intel Corporation Apparatus and method for adaptation of time synchronization of a plurality of multimedia streams
US7310064B2 (en) 2004-04-29 2007-12-18 Novariant Inc. Rebroadcasting method and system for navigation signals
US7398411B2 (en) 2005-05-12 2008-07-08 Schweitzer Engineering Laboratories, Inc. Self-calibrating time code generator
US20070132773A1 (en) 2005-12-08 2007-06-14 Smartdrive Systems Inc Multi-stage memory buffer and automatic transfers in vehicle event recording systems
US7617408B2 (en) 2006-02-13 2009-11-10 Schweitzer Engineering Labortories, Inc. System and method for providing accurate time generation in a computing device of a power system
US20070194987A1 (en) 2006-02-22 2007-08-23 Honeywell International Inc. Systems and methods for a high-precision time of arrival ultra-wideband positioning system
US7623068B2 (en) 2006-05-16 2009-11-24 Southwest Research Institute Detection of deception signal used to deceive geolocation receiver of a satellite navigation system
US7920881B2 (en) * 2007-05-15 2011-04-05 2Wire, Inc. Clock synchronization for a wireless communications system
KR100902601B1 (ko) 2007-05-17 2009-06-12 한양네비콤주식회사 무선 시각송수신시스템 및 무선 시각동기방법
US8237609B2 (en) 2009-02-22 2012-08-07 Trimble Navigation Limited GNSS position coasting
US7979228B2 (en) 2007-07-20 2011-07-12 The Regents Of The University Of Michigan High resolution time measurement in a FPGA
MX2010002163A (es) 2007-09-28 2010-06-02 Schweitzer Engineering Lab Inc Comparadores de amplitud y de fase para proteccion de linea.
JP5389039B2 (ja) 2007-11-02 2014-01-15 ノヴァテル インコーポレイテッド 正確な時間および周波数をネットワークにわたって分配するためのシステムおよび方法
WO2009067267A1 (en) 2007-11-25 2009-05-28 Mantovani Jose R B Navigation data acquisition and signal post-processing
US8116170B2 (en) 2007-12-19 2012-02-14 Seiko Epson Corporation Timekeeping device and satellite signal reception method for a timekeeping device
US7440427B1 (en) 2008-03-12 2008-10-21 Daniel A. Katz Increasing channel capacity of TDMA transmitters in satellite based networks
US8035558B2 (en) 2008-05-30 2011-10-11 The Boeing Company Precise absolute time transfer from a satellite system
JP4941775B2 (ja) 2008-06-23 2012-05-30 Ｎｅｃエンジニアリング株式会社 時刻同期装置
EP2316170A1 (en) 2008-08-04 2011-05-04 Endace USA Limited Method and system for distributing clock signals
US7986263B2 (en) 2008-09-22 2011-07-26 Sierra Wireless, Inc. Method and apparatus for a global navigation satellite system receiver coupled to a host computer system
US8159391B2 (en) 2008-11-13 2012-04-17 Ecole Polytechnique Federale De Lausanne (Epfl) Method to secure GNSS based locations in a device having GNSS receiver
US8035557B2 (en) 2008-11-24 2011-10-11 Andrew, Llc System and method for server side detection of falsified satellite measurements
US7940213B2 (en) 2008-11-24 2011-05-10 Andrew, Llc System and method for determining falsified satellite measurements
US8326319B2 (en) 2009-01-23 2012-12-04 At&T Mobility Ii Llc Compensation of propagation delays of wireless signals
US8886205B2 (en) 2009-03-02 2014-11-11 Qualcomm Incorporated Timing adjustment for synchronous operation in a wireless network
US7986266B2 (en) 2009-03-13 2011-07-26 Andrew, Llc Method and system for selecting optimal satellites in view
US20100254225A1 (en) 2009-04-03 2010-10-07 Schweitzer Iii Edmund O Fault tolerant time synchronization
US7978130B1 (en) 2009-05-01 2011-07-12 Coherent Navigation, Inc. Practical method for upgrading existing GNSS user equipment with tightly integrated Nav-Com capability
WO2010132946A1 (en) 2009-05-20 2010-11-25 Chronologic Pty. Ltd. Universal serial bus with lossless data pipe and precision synchronisation layer
US7915962B2 (en) 2009-07-06 2011-03-29 Nortel Networks Limited System and method for built in self test for timing module holdover
US8082367B2 (en) 2009-07-23 2011-12-20 Schneider Electric USA, Inc. Differential time synchronization of intelligent electronic devices
BR112012002904A2 (pt) 2009-08-10 2016-04-05 Scweitzer Engineering Lab Inc sistema e método para controlar um sistema de distribuição de energia elétrica, e, dispositivo eletrônico inteligente
US20110068973A1 (en) 2009-09-24 2011-03-24 Coherent Navigation, Inc. Assimilating GNSS Signals to Improve Accuracy, Robustness, and Resistance to Signal Interference
EP2348335A1 (en) 2010-01-22 2011-07-27 Astrium Limited A receiver and method for authenticating satellite signals
US8531332B2 (en) 2010-03-22 2013-09-10 Qualcomm Incorporated Anti-spoofing detection system
US7952519B1 (en) 2010-04-16 2011-05-31 John Nielsen Method and system for detecting GNSS spoofing signals
US8446896B2 (en) 2010-04-21 2013-05-21 Lsi Corporation Time synchronization using packet-layer and physical-layer protocols
US8624779B2 (en) 2010-05-18 2014-01-07 Trimble Navigation Limited Global navigation satellite system (GNSS) reference station integrity monitoring and assurance
US8519763B2 (en) 2010-06-11 2013-08-27 Altera Corporation Integrated circuits with dual-edge clocking
US8578012B2 (en) 2010-07-02 2013-11-05 Schweitzer Engineering Laboratories Inc Local intelligent electronic device (IED) rendering templates over limited bandwidth communication link to manage remote IED
US8583957B2 (en) 2010-07-27 2013-11-12 National Instruments Corporation Clock distribution in a distributed system with multiple clock domains over a switched fabric
JP5576747B2 (ja) * 2010-09-06 2014-08-20 株式会社日立製作所 通信システム及び時刻同期方法
US8812256B2 (en) 2011-01-12 2014-08-19 Schweitzer Engineering Laboratories, Inc. System and apparatus for measuring the accuracy of a backup time source
US8456353B2 (en) 2011-01-14 2013-06-04 Deere & Company Method and system for determining clock corrections
US8576778B2 (en) 2011-01-27 2013-11-05 Telefonaktiebolaget L M Ericsson (Publ) Transfer of synchronization in a hybrid global satellite packet network system
US20120198267A1 (en) 2011-01-31 2012-08-02 Srinjoy Das System and Method for Facilitating Data Transfer Between a First Clock Domain and a Second Clock Domain
EP3206050B1 (en) 2011-03-22 2025-01-08 Trimble Inc. Gnss sinal processing with delta phase
US9450691B2 (en) 2011-09-12 2016-09-20 Continental Teves Ag & Co. Ohg Method and device for synchronizing network subscribers in an on-board network of a vehicle
US9590411B2 (en) 2011-12-15 2017-03-07 Schweitzer Engineering Laboratories, Inc. Systems and methods for time synchronization of IEDs via radio link
US8583142B2 (en) 2012-03-16 2013-11-12 Qualcomm Incorporated Selective distribution of location based service content to mobile devices
US8564330B1 (en) 2012-06-05 2013-10-22 Xilinx, Inc. Methods and systems for high frequency clock distribution
CA2877720C (en) 2012-06-29 2020-09-01 Finite State Research Llc System for maintaining accurate ideal clock time
US9369225B2 (en) 2012-10-01 2016-06-14 Intel Deutschland Gmbh Distribution of an electronic reference clock signal that includes delay and validity information
US9383735B2 (en) 2012-10-04 2016-07-05 Schweitzer Engineering Laboratories, Inc. Distributed coordinated electric power delivery control system using component models
US9083503B2 (en) 2013-05-02 2015-07-14 Schweitzer Engineering Laboratories, Inc. Synchronized clock event report

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5537143A (en) * 1992-08-14 1996-07-16 Steingold; Harold Interactive communication system
US6061573A (en) * 1997-02-21 2000-05-09 Motorola, Inc. Method and apparatus in a radio communication system for synchronizing transmissions while maintaining full user traffic
US6940931B2 (en) * 2000-09-05 2005-09-06 Yamaha Corporation Clock-synchronism evaluating apparatus and method
US7714735B2 (en) * 2005-09-13 2010-05-11 Daniel Rockwell Monitoring electrical assets for fault and efficiency correction
US7986270B2 (en) * 2006-02-27 2011-07-26 Olympus Corporation Clock phase ranging methods and systems
US7746269B2 (en) * 2007-05-31 2010-06-29 Kabushiki Kaisha Toshiba DME ground apparatus
US20090310570A1 (en) * 2008-06-16 2009-12-17 Rivada Networks Llc Method and Systems Providing Peer-to-Peer Direct-Mode-Only Communications on CDMA Mobile Devices

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103579948A (zh) * 2013-11-28 2014-02-12 国家电网公司 整合型电力变压器智能组件
CN103579948B (zh) * 2013-11-28 2016-02-24 国家电网公司 整合型电力变压器智能组件
WO2016103227A1 (en) * 2014-12-24 2016-06-30 Abb Technology Ltd. A method for time synchronization of devices in a control network
US10097299B2 (en) 2014-12-24 2018-10-09 Abb Schweiz Ag Method for time synchronization of devices in a control network

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IN2014KN00879A (enExample) 2015-10-02
ES2523703R1 (es) 2015-11-17
MX2014005686A (es) 2014-08-08
US9590411B2 (en) 2017-03-07
ES2523703A2 (es) 2014-11-28
US20130157593A1 (en) 2013-06-20
CA2856444A1 (en) 2013-06-20
AU2012352497A1 (en) 2014-06-19
ES2523703B1 (es) 2016-09-02
BR112014014512A2 (pt) 2017-06-13

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