CA2877720C - System for maintaining accurate ideal clock time - Google Patents
System for maintaining accurate ideal clock time Download PDFInfo
- Publication number
- CA2877720C CA2877720C CA2877720A CA2877720A CA2877720C CA 2877720 C CA2877720 C CA 2877720C CA 2877720 A CA2877720 A CA 2877720A CA 2877720 A CA2877720 A CA 2877720A CA 2877720 C CA2877720 C CA 2877720C
- Authority
- CA
- Canada
- Prior art keywords
- clock
- time
- reference clock
- frequencies
- secondary clocks
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 claims abstract description 51
- 238000004590 computer program Methods 0.000 claims abstract description 10
- 230000004044 response Effects 0.000 claims description 20
- 238000004891 communication Methods 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000001914 filtration Methods 0.000 description 8
- 238000009499 grossing Methods 0.000 description 7
- 229910052701 rubidium Inorganic materials 0.000 description 7
- 239000013078 crystal Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
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- 238000004422 calculation algorithm Methods 0.000 description 3
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Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G7/00—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
- H04J3/0641—Change of the master or reference, e.g. take-over or failure of the master
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R40/00—Correcting the clock frequency
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electric Clocks (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261666101P | 2012-06-29 | 2012-06-29 | |
| US61/666,101 | 2012-06-29 | ||
| PCT/US2013/048566 WO2014005016A1 (en) | 2012-06-29 | 2013-06-28 | System for maintaining accurate ideal clock time |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2877720A1 CA2877720A1 (en) | 2014-01-03 |
| CA2877720C true CA2877720C (en) | 2020-09-01 |
Family
ID=49778030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2877720A Active CA2877720C (en) | 2012-06-29 | 2013-06-28 | System for maintaining accurate ideal clock time |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US9348321B2 (enExample) |
| EP (2) | EP2867740B1 (enExample) |
| CA (1) | CA2877720C (enExample) |
| IN (1) | IN2015DN00593A (enExample) |
| WO (1) | WO2014005016A1 (enExample) |
Families Citing this family (56)
| 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 |
| WO2014062924A1 (en) | 2012-10-19 | 2014-04-24 | Schweitzer Engineering Laboratories, Inc. | Time distribution device with multi-band antenna |
| 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 |
| 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 |
| US9709682B2 (en) | 2013-05-06 | 2017-07-18 | Schweitzer Engineering Laboratories, Inc. | Multi-constellation GNSS integrity check for detection of time signal manipulation |
| US9759816B2 (en) | 2013-01-11 | 2017-09-12 | Schweitzer Engineering Laboratories, Inc. | Multi-constellation GNSS integrity check for detection of time signal manipulation |
| US9490911B2 (en) | 2013-03-15 | 2016-11-08 | Fairfield Industries Incorporated | High-bandwidth underwater data communication system |
| US9490910B2 (en) | 2013-03-15 | 2016-11-08 | Fairfield Industries Incorporated | High-bandwidth underwater data communication system |
| 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 |
| US20150103818A1 (en) * | 2013-10-11 | 2015-04-16 | Qualcomm Incorporated | Transport and error compensation of a globally synchronized time-base |
| US9805072B2 (en) * | 2014-03-21 | 2017-10-31 | Sap Se | Qualification of match results |
| US9270442B2 (en) | 2014-04-29 | 2016-02-23 | Schweitzer Engineering Laboratories, Inc. | Time signal propagation delay correction |
| US20150316286A1 (en) * | 2014-04-30 | 2015-11-05 | Carrier Corporation | System and method of operating an hvac controller based on a third party calendar event |
| US9425652B2 (en) | 2014-06-16 | 2016-08-23 | Schweitzer Engineering Laboratories, Inc. | Adaptive holdover timing error estimation and correction |
| US9276678B1 (en) | 2014-07-23 | 2016-03-01 | Google Inc. | Scalable multi-source GPS signal distribution network |
| US9369896B1 (en) | 2014-07-23 | 2016-06-14 | Google Inc. | Scalable multi-source GPS signal distribution network |
| US11157998B2 (en) * | 2014-08-04 | 2021-10-26 | Renaissance Technologies Llc | System and method for executing synchronized trades in multiple exchanges |
| US9813173B2 (en) | 2014-10-06 | 2017-11-07 | Schweitzer Engineering Laboratories, Inc. | Time signal verification and distribution |
| US20160197669A1 (en) | 2014-12-11 | 2016-07-07 | Tesla Wireless Company LLC | Communication method and system that uses low latency/low data bandwidth and high latency/high data bandwidth pathways |
| US10310091B2 (en) * | 2015-01-31 | 2019-06-04 | Southwest Research Institute | GPS-based time stamp system |
| US11487871B2 (en) * | 2015-01-31 | 2022-11-01 | San Diego Gas & Electric Company | Methods and systems for detecting and defending against invalid time signals |
| US9851449B2 (en) * | 2015-08-28 | 2017-12-26 | Verizon Patent And Licensing Inc. | Robust position determination in communication systems |
| 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 |
| RU2623718C1 (ru) * | 2016-04-11 | 2017-06-28 | Акционерное общество "Институт прикладной астрономии" | Модем сигналов передачи времени по дуплексному каналу спутниковой связи |
| US10712458B2 (en) * | 2016-06-30 | 2020-07-14 | Magseis Ff Llc | Seismic surveys with optical communication links |
| JP6772700B2 (ja) * | 2016-09-15 | 2020-10-21 | カシオ計算機株式会社 | 測位装置、電子時計、測位制御方法、及びプログラム |
| US10509434B1 (en) * | 2016-09-27 | 2019-12-17 | Amazon Technologies, Inc. | Oscillator profiling for time synchronization |
| US10396922B2 (en) * | 2017-02-07 | 2019-08-27 | Texas Instruments Incorporated | Apparatus and mechanism to support multiple time domains in a single soc for time sensitive network |
| US10527732B2 (en) | 2017-02-09 | 2020-01-07 | Schweitzer Engineering Laboratories, Inc. | Verification of time sources |
| EP3701663A4 (en) * | 2017-10-24 | 2021-07-28 | Skywave Networks LLC | CLOCK SYNCHRONIZATION WHEN SWITCHING BETWEEN BROADCAST AND DATA TRANSMISSION MODES |
| US11630424B2 (en) | 2018-07-13 | 2023-04-18 | Schweitzer Engineering Laboratories, Inc. | Time signal manipulation detection using remotely managed time |
| US10819727B2 (en) | 2018-10-15 | 2020-10-27 | Schweitzer Engineering Laboratories, Inc. | Detecting and deterring network attacks |
| US11287532B2 (en) * | 2018-11-13 | 2022-03-29 | Topcon Positioning Systems, Inc. | GNSS receiver with synchronization to external timescale |
| CN111258209A (zh) * | 2018-12-25 | 2020-06-09 | 维沃移动通信有限公司 | 一种时间信息的获取方法、发送方法、终端和网络设备 |
| EP3677984B1 (en) | 2019-01-07 | 2022-08-10 | ADVA Optical Networking SE | Method of time delivery in a computing system and system thereof |
| CN109696822B (zh) * | 2019-01-17 | 2021-01-01 | 西安电子科技大学 | 一种时间信号切换系统及切换方法 |
| GB201900789D0 (en) * | 2019-01-21 | 2019-03-06 | Hoptroff London Ltd | Method for testing time distribution |
| WO2020154840A1 (en) * | 2019-01-28 | 2020-08-06 | Telefonaktiebolaget Lm Ericsson (Publ) | Clock distribution method and apparatus in network |
| 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 |
| PH12021552935A1 (en) | 2019-05-22 | 2022-07-25 | Vit Tall Llc | Multi-clock synchronization in power grids |
| CN110708060B (zh) * | 2019-08-26 | 2023-04-14 | 西安空间无线电技术研究所 | 一种优化c场电流降低铷钟温度敏感性的方法 |
| US11119531B2 (en) | 2019-12-06 | 2021-09-14 | Oracle International Corporation | Parallel pseudo infinite monotonic timeline clock |
| CN112748655B (zh) * | 2020-12-16 | 2022-04-19 | 北京无线电计量测试研究所 | 具有减振功能的宽温范围铷钟快速温控装置及使用方法 |
| US11994597B2 (en) | 2021-01-09 | 2024-05-28 | Honeywell International Inc. | Systems and methods using chip-scale atomic clock to detect spoofed GNSS |
| US11994596B2 (en) | 2021-01-09 | 2024-05-28 | Honeywell International Inc. | Systems and methods using chip-scale atomic clock to detect spoofed GNSS |
| WO2023023168A1 (en) * | 2021-08-17 | 2023-02-23 | Tobkin Joshua | Satellite and miniature atomic clocks for near perfect time for distributed blockchain non-interactive synchronization |
| CN115639743B (zh) * | 2022-10-19 | 2023-05-30 | 中国科学院国家授时中心 | 一种基于整网时间比对的天基时间基准建立方法及系统 |
| US12216489B2 (en) * | 2023-02-21 | 2025-02-04 | Mellanox Technologies, Ltd | Clock adjustment holdover |
| CN115981135B (zh) * | 2023-03-17 | 2023-06-06 | 深圳市天辰防务通信技术有限公司 | 军用车载时统设备及其控制方法和时统处理板 |
| US12449550B2 (en) | 2023-03-22 | 2025-10-21 | Schweitzer Engineering Laboratories, Inc. | GNSS authentication through multi-site observables and data comparisons |
| US12457034B2 (en) | 2023-04-28 | 2025-10-28 | Hughes Network Systems, Llc | Enhanced clock frequency control |
| US20250147542A1 (en) * | 2023-07-12 | 2025-05-08 | Parry Labs Llc | Edge Device Clock and Clocking Method |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4476445A (en) * | 1982-05-18 | 1984-10-09 | Eg&G, Inc. | Methods and apparatus for rapid and accurate frequency syntonization of an atomic clock |
| US4899117A (en) * | 1987-12-24 | 1990-02-06 | The United States Of America As Represented By The Secretary Of The Army | High accuracy frequency standard and clock system |
| US5726607A (en) * | 1992-06-15 | 1998-03-10 | Adc Telecommunications, Inc. | Phase locked loop using a counter and a microcontroller to produce VCXO control signals |
| US5689688A (en) * | 1993-11-16 | 1997-11-18 | International Business Machines Corporation | Probabilistic anonymous clock synchronization method and apparatus for synchronizing a local time scale with a reference time scale |
| US5666330A (en) * | 1994-07-21 | 1997-09-09 | Telecom Solutions, Inc. | Disciplined time scale generator for primary reference clocks |
| US6115825A (en) * | 1998-09-11 | 2000-09-05 | Nortel Networks Corporation | Method for synchronization distribution in a communications network |
| US6236623B1 (en) * | 1998-10-16 | 2001-05-22 | Moore Industries | System and method for synchronizing clocks in a plurality of devices across a communication channel |
| US6742048B1 (en) * | 2000-07-10 | 2004-05-25 | Advanced Micro Devices, Inc. | Multilevel network for distributing trusted time and delegating levels of trust regarding timekeeping |
| US6751685B2 (en) * | 2001-04-18 | 2004-06-15 | Telephonics Corporation | E1/T1 to asynchronous communications interface |
| US20020186619A1 (en) * | 2001-05-07 | 2002-12-12 | Reeves Michael H. | Apparatus, system and method for synchronizing a clock with a master time service |
| US7251199B2 (en) * | 2001-12-24 | 2007-07-31 | Agilent Technologies, Inc. | Distributed system time synchronization including a timing signal path |
| EP1720022B1 (de) * | 2005-04-29 | 2010-06-16 | Tektronix International Sales GmbH | Zeitlich synchronisiertes Messsystem und Verfahren zum zeitlichen Synchronisieren von mindestens einer Master- und einer Slave-Vorrichtung |
| US9236966B2 (en) * | 2005-11-30 | 2016-01-12 | Caterpillar Inc. | Clock synchronization for a machine control system |
| US7606541B1 (en) * | 2006-04-12 | 2009-10-20 | Nortel Network Limited | Enhanced holdover for synchronous networks employing packet switched network backhaul |
| US7948833B2 (en) * | 2007-07-25 | 2011-05-24 | Computime, Ltd. | Clock setup over a network |
| WO2010115151A1 (en) | 2009-04-03 | 2010-10-07 | Schweitzer Engineering Laboratories, Inc. | Fault tolerant time synchronization |
| US8120432B2 (en) | 2009-06-19 | 2012-02-21 | Rockstar Bidco, LP | System and method for selecting optimum local oscillator discipline source |
| US8446896B2 (en) | 2010-04-21 | 2013-05-21 | Lsi Corporation | Time synchronization using packet-layer and physical-layer protocols |
| US20120020191A1 (en) * | 2010-06-17 | 2012-01-26 | Ilan Shemesh | Wireless Clock System |
-
2013
- 2013-06-28 IN IN593DEN2015 patent/IN2015DN00593A/en unknown
- 2013-06-28 US US13/931,149 patent/US9348321B2/en active Active - Reinstated
- 2013-06-28 WO PCT/US2013/048566 patent/WO2014005016A1/en not_active Ceased
- 2013-06-28 CA CA2877720A patent/CA2877720C/en active Active
- 2013-06-28 EP EP13810228.0A patent/EP2867740B1/en active Active
- 2013-06-28 EP EP17001444.3A patent/EP3282340A1/en not_active Withdrawn
-
2016
- 2016-04-28 US US15/140,784 patent/US9671761B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP2867740B1 (en) | 2017-08-30 |
| EP2867740A4 (en) | 2016-05-25 |
| EP2867740A1 (en) | 2015-05-06 |
| US9348321B2 (en) | 2016-05-24 |
| EP3282340A1 (en) | 2018-02-14 |
| CA2877720A1 (en) | 2014-01-03 |
| IN2015DN00593A (enExample) | 2015-06-26 |
| WO2014005016A1 (en) | 2014-01-03 |
| US9671761B2 (en) | 2017-06-06 |
| US20160238999A1 (en) | 2016-08-18 |
| US20140003199A1 (en) | 2014-01-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20180615 |