WO2003100533A1 - Synchronisation system for internal clocks of synchronised devices - Google Patents

Synchronisation system for internal clocks of synchronised devices Download PDF

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Publication number
WO2003100533A1
WO2003100533A1 PCT/DE2003/001526 DE0301526W WO03100533A1 WO 2003100533 A1 WO2003100533 A1 WO 2003100533A1 DE 0301526 W DE0301526 W DE 0301526W WO 03100533 A1 WO03100533 A1 WO 03100533A1
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WO
WIPO (PCT)
Prior art keywords
time
internal clocks
devices
center
signal
Prior art date
Application number
PCT/DE2003/001526
Other languages
German (de)
French (fr)
Inventor
Tilo Krebs
Gerd Lissewski
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to DK03729884.1T priority Critical patent/DK1506458T3/en
Priority to EP03729884.1A priority patent/EP1506458B1/en
Publication of WO2003100533A1 publication Critical patent/WO2003100533A1/en

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G5/00—Setting, i.e. correcting or changing, the time-indication
    • G04G5/002—Setting, i.e. correcting or changing, the time-indication brought into action by radio
    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R20/00—Setting the time according to the time information carried or implied by the radio signal
    • G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R20/00—Setting the time according to the time information carried or implied by the radio signal
    • G04R20/26—Setting the time according to the time information carried or implied by the radio signal the radio signal being a near-field communication signal

Definitions

  • the invention relates to a synchronization system for internal clocks of time-coordinated devices, which comprises means for receiving a time signal from a time transmitter specifying a normal time, the clock times of the internal clocks being adjustable in accordance with the received time signal.
  • the control units of traffic signal systems are connected to a traffic control center.
  • the traffic condition at nodes in the control area is recorded by detector devices and transmitted to the traffic control center.
  • signal programs are calculated from the recorded traffic data on the basis of traffic-dependent control methods, according to which the signal times of the light signal systems are switched via the control devices.
  • the internal clocks of the control units must have a precisely defined relationship to each other and thus be synchronized from time to time.
  • Parking management is another example.
  • parking guidance systems are used which, via display devices, show a parking space seeker the way to a free parking space in a parking garage or in a parking lot.
  • correct date and time information is indispensable in the individual parking ticket machines.
  • the internal clocks of the parking ticket machines must be synchronized from time to time.
  • a device for the synchronization of internal clocks in parking ticket machines is known from utility model DE 298 22 429 U1.
  • the various parking ticket machines are connected to a control center via a bidirectional data transmission, which is based on a PC system.
  • a radio clock is provided in the control center, which is synchronized by a time signal from a time transmitter which specifies a standard time - for example the Physikalisch-Technische Bundesweg. For example, if the control center receives a status message from the individual parking ticket machines, the time of the radio clock is appended to the acknowledgment of this signal from the control center and transmitted to the individual internal clocks of the machines.
  • internal clocks can be synchronized, whose radio clock receivers are within a radius of approx. 1500 km around the time transmitter.
  • the invention has for its object to provide a synchronization system of the type mentioned, which is able to synchronize the internal clocks of time-coordinated devices within the largest possible area.
  • this object is achieved by a generic synchronization system in which the time transmitter is designed as a satellite system.
  • a system of satellites moving around the earth provides a standard time that can be received globally.
  • receiving means can receive the normal time specified by the satellite system.
  • the means for receiving the respective time signal can be designed, for example, as GPS receivers known per se and can be arranged in each device.
  • the receiving means are arranged in a center, means being provided for transmitting a received time signal from the center to the internal clocks of the devices.
  • a GPS receiver then only has to be purchased in a cost-effective manner for each network control center, as a result of which the internal clocks of all control centers worldwide can be synchronized with the normal time of the satellite system.
  • the time signal received can then be forwarded by transmission means to the internal clocks of the individual devices at time intervals which can be predetermined by the operator of the networks, so that worldwide synchronization is possible.
  • line-based transmission means such as the fixed telephone network or fiber optics.
  • the transmission means are designed for radio transmission of a time signal.
  • the location of the time-coordinated facilities is not tied to the infrastructure of a pipeline network.
  • known bidirectional transmission means such as trunked radio or a GSM mobile radio network with 900, 1800 or 1900 MHz can be used.
  • other standards such as GPRS or UMTS, can of course also be used.
  • a synchronization system is used for time-coordinated road traffic technology devices, in particular for parking ticket machines connected to a monitoring center or for control devices for traffic signal systems connected to a traffic computer center.
  • a large number of devices 1 designed as parking ticket machines are connected to a center 2 for monitoring the devices 1 by means of a bidirectional data transmission.
  • the control center 2 as shown schematically, is based on a PC system.
  • the time transmitter 3 specifying the normal time is designed as a satellite system, the time signals of which can be received worldwide.
  • the control center 2 has a GPS receiver as the receiving means 4 for such a time signal.
  • the normal time is thus available in each control center 2 with reception means 4 designed as GPS receivers, even in control centers 2 which are much further apart than the reception range of a radio clock system specifies. If required, the internal clocks of the parking ticket machines 1 can now be synchronized in accordance with the normal time available in a control center 2.
  • existing transmission means 5 are used, which are designed as radio modems for a GSM or also GPRS or UMTS radio network.
  • the transmission means enable bidirectional data transmission between the parking ticket machines 1 and the control center 2, with the parking ticket machines 1 reporting on their status, the cash register stand or the daily income is sent to the control center 2, which is acknowledged by a returned confirmation signal. Attached to this acknowledgment signal, the satellite-synchronized time for setting the internal clocks can be transmitted to the parking ticket machines 1. This makes it possible to synchronize internal clocks of parking ticket machines 1, the centers 2 of which are arranged over long distances and even distributed worldwide.

Abstract

The invention relates to a synchronisation system for internal clocks of synchronised devices (1), comprising means for receiving (4) a time signal emitted from a time emitter (3) indicating a standard time. The times of the internal clocks can be adjusted such that they correspond to the received time signal. The time emitter (3) which is configured as a satellite system enables the synchronisation of the internal clocks of devices (1) which are embodied, for example, as parking meters, the surveillance centres thereof (2) being arranged over very large areas, even world-wide.

Description

Beschreibungdescription
Synchronisationssystem für interne Uhren zeitlich aufeinander abgestimmter EinrichtungenSynchronization system for internal clocks of coordinated facilities
Die Erfindung bezieht sich auf ein Synchronisationssystem für interne Uhren zeitlich aufeinander abgestimmter Einrichtungen, welches Mittel zum Empfang eines Zeitsignals von einem eine Normalzeit vorgebender Zeitsender umfasst, wobei die UhrZeiten der internen Uhren entsprechend dem empfangenen Zeitsignal einstellbar sind.The invention relates to a synchronization system for internal clocks of time-coordinated devices, which comprises means for receiving a time signal from a time transmitter specifying a normal time, the clock times of the internal clocks being adjustable in accordance with the received time signal.
Bei unterschiedlichsten industriellen Prozessen, wie auch bei vielen Anwendungen des täglichen Lebens, kommen Einrichtungen zum Einsatz, die in irgendeiner Weise zeitlich aufeinander abgestimmt sind. Um den Zeitpunkt von Ereignissen oder die Zeitdauer von Vorgängen in den unterschiedlichen Einrichtungen definieren zu können, werden zum Teil hohe Anforderungen an die Genauigkeit von internen Uhren dieser Einrichtungen gestellt. Obwohl die Ungenauigkeit der heute üblicherweise verwendeten Quarzuhren nur wenige Minuten im Jahr beträgt, ist es notwendig, die internen Uhren zeitlich aufeinander abgestimmter Einrichtungen von Zeit zu Zeit zu synchronisieren. Dies trifft insbesondere für Einrichtungen aus der Straßen- Verkehrstechnik zu.In a wide variety of industrial processes, as well as in many everyday applications, facilities are used that are in any way coordinated with one another in terms of time. In order to be able to define the time of events or the duration of events in the different facilities, high demands are sometimes made on the accuracy of internal clocks of these facilities. Although the inaccuracy of the quartz clocks commonly used today is only a few minutes a year, it is necessary to synchronize the internal clocks of time-coordinated devices from time to time. This applies in particular to facilities from road traffic engineering.
In einem bestimmten Regelgebiet eines Straßennetzes sind die Steuergeräte von Lichtsignalanlagen mit einer Verkehrsrechnerzentrale verbunden. In bestimmten Abständen wird der Ver- kehrszustand an Knotenpunkten des Regelgebietes von Detektoreinrichtungen erfasst und an die Verkehrsrechnerzentrale ü- bertragen. Zur Erzielung eines optimalen Verkehrsablaufs werden aus den erfassten Verkehrsdaten auf der Grundlage Verkehrsabhängiger Steuerungsverfahren Signalprogramrαe berech- net, nach welchen die Signalzeiten der Lichtsignalanlagen ü- ber die Steuergeräte geschaltet werden. Zur Erzeugung einer grünen Welle auf einer bestimmten Strecke des Straßennetzes müssen die internen Uhren der Steuergeräte in einer zeitlich genau definierten Beziehung zueinander stehen und damit von Zeit zu Zeit synchronisiert werden.In a certain control area of a road network, the control units of traffic signal systems are connected to a traffic control center. At certain intervals, the traffic condition at nodes in the control area is recorded by detector devices and transmitted to the traffic control center. To achieve an optimal traffic flow, signal programs are calculated from the recorded traffic data on the basis of traffic-dependent control methods, according to which the signal times of the light signal systems are switched via the control devices. To generate a green wave on a specific section of the road network the internal clocks of the control units must have a precisely defined relationship to each other and thus be synchronized from time to time.
Als weiteres Beispiel sei die Parkraumbewirtschaftung aufgeführt. Zur optimalen Auslastung eines zur Verfügung stehenden Parkraumes werden Parkleitsysteme eingesetzt, die über Anzeigevorrichtungen einem Parkplatzsuchenden den Weg zu einem freien Stellplatz in einem Parkhaus oder auf einem Parkplatz weist. Zum Zwecke der Parkgebührenberechnung oder als Grundlage für statistische Auswertungen ist eine korrekte Datumsund Zeitangabe in den einzelnen Parkscheinautomaten unabdingbar. Dazu sind die internen Uhren der Parkscheinautomaten von Zeit zu Zeit zu synchronisieren.Parking management is another example. In order to optimally utilize the available parking space, parking guidance systems are used which, via display devices, show a parking space seeker the way to a free parking space in a parking garage or in a parking lot. For the purpose of parking fee calculation or as the basis for statistical evaluations, correct date and time information is indispensable in the individual parking ticket machines. The internal clocks of the parking ticket machines must be synchronized from time to time.
Aus der Gebrauchsmusterschrift DE 298 22 429 Ul ist eine Einrichtung zur Synchronisation von internen Uhren in Parkscheinautomaten bekannt. Die verschiedenen Parkscheinautomaten sind über eine bidirektionale Datenübertragung mit einer Zentrale verbunden, die auf einem PC-System basiert. In der Zentrale ist eine Funkuhr vorgesehen, die durch ein Zeitsignal eines eine Normzeit vorgebenden Zeitsenders - etwa der Physikalisch-Technischen Bundesanstalt - synchronisiert ist. Empfängt die Zentrale beispielsweise eine Statusmeldung von den einzelnen Parkscheinautomaten, so wird an die Quittierung dieses Signals von der Zentrale die Uhrzeit der Funkuhr angehängt und zu den einzelnen internen Uhren der Automaten übertragen. Mit diesem System können interne Uhren synchronisiert werden, deren Funkuhrempfänger innerhalb eines Radiuses von ca. 1500 km um den Zeitsender liegen.A device for the synchronization of internal clocks in parking ticket machines is known from utility model DE 298 22 429 U1. The various parking ticket machines are connected to a control center via a bidirectional data transmission, which is based on a PC system. A radio clock is provided in the control center, which is synchronized by a time signal from a time transmitter which specifies a standard time - for example the Physikalisch-Technische Bundesanstalt. For example, if the control center receives a status message from the individual parking ticket machines, the time of the radio clock is appended to the acknowledgment of this signal from the control center and transmitted to the individual internal clocks of the machines. With this system, internal clocks can be synchronized, whose radio clock receivers are within a radius of approx. 1500 km around the time transmitter.
Der Erfindung liegt die Aufgabe zugrunde ein Synchronisationssystem der eingangs genannten Art bereitzustellen, welches die internen Uhren von zeitlich aufeinander abgestimmten Ein- richtungen innerhalb eines möglichst großen Gebietes zu synchronisieren vermag. Erfindungsgemäß wird diese Aufgabe gelöst durch ein gattungsgemäßes Synchronisationssystem, bei dem der Zeitsender als Satellitensystem ausgebildet ist. Ein System von sich um die Erde bewegenden Satelliten stellt eine Normalzeit zur Verfü- gung, die global empfangen werden kann. Zur Synchronisation der internen Uhren können Empfangsmittel die durch das Satellitensystem vorgegebene Normalzeit empfangen. Die Mittel zum Empfang des jeweiligen Zeitsignals können z.B. als an sich bekannte GPS-Empfänger ausgebildet und in jeder Einrichtung angeordnet sein.The invention has for its object to provide a synchronization system of the type mentioned, which is able to synchronize the internal clocks of time-coordinated devices within the largest possible area. According to the invention, this object is achieved by a generic synchronization system in which the time transmitter is designed as a satellite system. A system of satellites moving around the earth provides a standard time that can be received globally. To synchronize the internal clocks, receiving means can receive the normal time specified by the satellite system. The means for receiving the respective time signal can be designed, for example, as GPS receivers known per se and can be arranged in each device.
In einer bevorzugten Ausführungsform des erfindungsgemäßen Synchronisationssystems sind die Empfangsmittel in einer Zentrale angeordnet, wobei Mittel zur Übertragung eines emp- fangenen Zeitsignals von der Zentrale an die internen Uhren der Einrichtungen vorgesehen sind. Dadurch genügt es bei vernetzten Einrichtungen, die mit einer Zentrale verbunden sind, statt in jeder einzelnen Einrichtung die Empfangsmittel nur in der Zentrale vorzusehen. In kostengünstiger Weise braucht dann lediglich für jede Netzzentrale ein GPS-Empfänger angeschafft zu werden, wodurch weltweit die internen Uhren aller Zentralen mit der Normalzeit des Satellitensystems synchronisierbar sind. In durch den Betreiber der Netze vorgebbaren Zeitabständen kann dann das empfangene Zeitsignal durch Über- tragungsmittel an die internen Uhren der einzelnen Einrichtungen weitergegeben werden, so dass eine weltweite Synchronisation möglich ist. Es kommen leitungsgebundene Übertragungsmittel in Betracht, wie etwa das Telefonfestnetz oder auch Lichtwellenleiter.In a preferred embodiment of the synchronization system according to the invention, the receiving means are arranged in a center, means being provided for transmitting a received time signal from the center to the internal clocks of the devices. As a result, in the case of networked devices which are connected to a center, it is sufficient to provide the receiving means only in the center in each individual device. A GPS receiver then only has to be purchased in a cost-effective manner for each network control center, as a result of which the internal clocks of all control centers worldwide can be synchronized with the normal time of the satellite system. The time signal received can then be forwarded by transmission means to the internal clocks of the individual devices at time intervals which can be predetermined by the operator of the networks, so that worldwide synchronization is possible. There are line-based transmission means, such as the fixed telephone network or fiber optics.
In einer vorteilhaften Ausgestaltung der Erfindung sind die Übertragungsmittel zur Funkübertragung eines Zeitsignals ausgebildet. Dadurch ist der Standort der zeitlich aufeinander abgestimmten Einrichtungen nicht an die Infrastruktur eines Leitungsnetzes gebunden. Vielmehr können bekannte bidirektionale Übertragungsmittel, wie Bündelfunk oder ein GSM-Mobilfunknetz mit 900 bzw. 1800 bzw. 1900 MHz eingesetzt werden. Alternativ sind natürlich auch andere Standards, etwa GPRS oder UMTS, einsetzbar.In an advantageous embodiment of the invention, the transmission means are designed for radio transmission of a time signal. As a result, the location of the time-coordinated facilities is not tied to the infrastructure of a pipeline network. Rather, known bidirectional transmission means such as trunked radio or a GSM mobile radio network with 900, 1800 or 1900 MHz can be used. Alternatively, other standards, such as GPRS or UMTS, can of course also be used.
Vorzugsweise wird ein erfindungsgemäßes Synchronisationssystem für zeitlich aufeinander abgestimmte Einrichtungen der Straßenverkehrstechnik verwendet, insbesondere für mit einer Überwachungszentrale verbundene Parkscheinautomaten oder für mit einer Verkehrsrechnerzentrale verbundene Steuergeräte für Lichtsignalanlagen.Preferably, a synchronization system according to the invention is used for time-coordinated road traffic technology devices, in particular for parking ticket machines connected to a monitoring center or for control devices for traffic signal systems connected to a traffic computer center.
Die Erfindung wird nun anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert, in deren einziger Figur ein erfindungsgemäßes Synchronisationssystem für interne Uhren von Parkscheinautomaten schematisch veranschau- licht ist.The invention will now be explained in more detail with reference to an embodiment shown in the drawing, in the single figure of which a synchronization system according to the invention for internal clocks of parking ticket machines is schematically illustrated.
Gemäß der Figur ist eine Vielzahl an als Parkscheinautomaten ausgebildeten Einrichtungen 1 mit einer Zentrale 2 zur Überwachung der Einrichtungen 1 mittels einer bidirektionalen Da- tenübertragung verbunden. Die Zentrale 2 basiert, wie schematisch dargestellt, auf einem PC-System. Der die Normalzeit vorgebende Zeitsender 3 ist als Satellitensystem ausgebildet, dessen Zeitsignale weltweit empfangen werden können. Als Empfangsmittel 4 für ein solches Zeitsignal weist die Zentrale 2 einen GPS-Empfänger auf. Damit steht in jeder Zentrale 2 mit als GPS-Empfänger ausgebildeten Empfangsmitteln 4 die Normalzeit zur Verfügung und zwar auch in Zentralen 2, die wesentlich weiter voneinander entfernt liegen, als der Empfangsbereich eines Funkuhrsystems vorgibt. Nach Bedarf können nun die internen Uhren der Parkscheinautomaten 1 entsprechend der in einer Zentrale 2 verfügbaren Normalzeit synchronisiert werden. Hierzu bedient man sich bereits vorhandener Übertragungsmittel 5, die als Funkmodem für ein GSM- oder auch GPRS- oder UMTS-Funknetz ausgebildet sind. Die Übertragungsmittel ermöglichen eine bidirektionale Datenübertragung zwischen den Parkscheinautomaten 1 und der Zentrale 2, wobei von den Parkscheinautomaten 1 Meldungen über ihren Status, den Kassen- stand oder die Tageseinnahmen an die Zentrale 2 gesendet werden, was durch ein zurückgesendetes Bestätigungssignal quittiert wird. An dieses Quittierungssignal angehängt kann die Satelliten-synchronisierte Uhrzeit zur Einstellung der internen Uhren an die Parkscheinautomaten 1 übertragen werden. Damit ist es möglich, interne Uhren von Parkscheinautomaten 1 zu synchronisieren, deren Zentralen 2 über große Entfernungen und sogar weltweit verteilt angeordnet sind. According to the figure, a large number of devices 1 designed as parking ticket machines are connected to a center 2 for monitoring the devices 1 by means of a bidirectional data transmission. The control center 2, as shown schematically, is based on a PC system. The time transmitter 3 specifying the normal time is designed as a satellite system, the time signals of which can be received worldwide. The control center 2 has a GPS receiver as the receiving means 4 for such a time signal. The normal time is thus available in each control center 2 with reception means 4 designed as GPS receivers, even in control centers 2 which are much further apart than the reception range of a radio clock system specifies. If required, the internal clocks of the parking ticket machines 1 can now be synchronized in accordance with the normal time available in a control center 2. For this purpose, existing transmission means 5 are used, which are designed as radio modems for a GSM or also GPRS or UMTS radio network. The transmission means enable bidirectional data transmission between the parking ticket machines 1 and the control center 2, with the parking ticket machines 1 reporting on their status, the cash register stand or the daily income is sent to the control center 2, which is acknowledged by a returned confirmation signal. Attached to this acknowledgment signal, the satellite-synchronized time for setting the internal clocks can be transmitted to the parking ticket machines 1. This makes it possible to synchronize internal clocks of parking ticket machines 1, the centers 2 of which are arranged over long distances and even distributed worldwide.

Claims

Patentansprüche claims
1. Synchronisationssystem für interne Uhren zeitlich aufeinander abgestimmter Einrichtungen (1) , welches Mittel zum Emp- fang (4) eines Zeitsignals von einem eine Normalzeit vorgebenden Zeitsender (3) umfasst, wobei die Uhrzeiten der internen Uhren entsprechend dem empfangenen Zeitsignal einstellbar sind, d a d u r c h g e k e n n z e i c h n e t , dass der Zeitsender (3) als Satellitensystem ausgebildet ist.1. Synchronization system for internal clocks of time-coordinated devices (1), which comprises means for receiving (4) a time signal from a time transmitter (3) specifying a normal time, the times of the internal clocks being adjustable in accordance with the received time signal that the time transmitter (3) is designed as a satellite system.
2. Synchronisationssystem nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass die Empfangsmittel (4) in einer Zentrale (2) angeordnet sind, wobei Mittel zur Übertragung (5) eines empfangenen Zeitsignals von der Zentrale (2) an die internen Uhren der Einrichtungen (1) vorgesehen sind.2. Synchronization system according to claim 1, characterized in that the receiving means (4) are arranged in a center (2), means for transmitting (5) a received time signal from the center (2) to the internal clocks of the devices (1) being provided are.
3. Synchronisationssystem nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , dass die Ü- bertragungsmittel (5) zur Funkübertragung eines Zeitsignals ausgebildet sind.3. The synchronization system as claimed in claim 2, so that the transmission means (5) are designed for radio transmission of a time signal.
4. Verwendung eines Synchronisationssystems nach einem der Ansprüche 1 bis 3 für zeitlich aufeinander abgestimmte Einrichtungen (1) der Straßenverkehrstechnik, insbesondere für mit einer Überwachungszentrale verbundene Parkscheinautomaten oder für mit einer Verkehrsrechnerzentrale verbundene Steuergeräte für Lichtsignalanlagen. 4. Use of a synchronization system according to one of claims 1 to 3 for time-coordinated devices (1) of road traffic technology, in particular for parking ticket machines connected to a monitoring center or for control units for traffic signal systems connected to a traffic computer center.
PCT/DE2003/001526 2002-05-23 2003-05-12 Synchronisation system for internal clocks of synchronised devices WO2003100533A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK03729884.1T DK1506458T3 (en) 2002-05-23 2003-05-12 Technical street traffic facility
EP03729884.1A EP1506458B1 (en) 2002-05-23 2003-05-12 Street traffic technical system

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Application Number Priority Date Filing Date Title
DE10222853.1 2002-05-23
DE10222853A DE10222853A1 (en) 2002-05-23 2002-05-23 Synchronization system for internal clocks of coordinated facilities

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WO2003100533A1 true WO2003100533A1 (en) 2003-12-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011004214A1 (en) * 2009-07-07 2011-01-13 Council Of Scientific & Industrial Research Improved teleclock receiver utilizing mobile telephone network

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004035194B4 (en) * 2004-07-21 2006-12-07 Görlitz Ag Method for forwarding time information

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5521887A (en) * 1993-07-30 1996-05-28 Trimble Navigation Limited Time transfer system
US5677895A (en) * 1994-08-18 1997-10-14 Mankovitz; Roy J. Apparatus and methods for setting timepieces
DE29822429U1 (en) * 1998-12-16 1999-03-04 Siemens Ag Device for synchronizing internal clocks in parking ticket machines
EP1079286A2 (en) * 1999-08-24 2001-02-28 Junghans Uhren GmbH Method and device for displaying local time
US6377517B1 (en) * 2000-10-17 2002-04-23 Agilent Technologies Inc. Method and system for synchronizing a time of day clock based on a satellite signal and a communication signal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5521887A (en) * 1993-07-30 1996-05-28 Trimble Navigation Limited Time transfer system
US5677895A (en) * 1994-08-18 1997-10-14 Mankovitz; Roy J. Apparatus and methods for setting timepieces
DE29822429U1 (en) * 1998-12-16 1999-03-04 Siemens Ag Device for synchronizing internal clocks in parking ticket machines
EP1079286A2 (en) * 1999-08-24 2001-02-28 Junghans Uhren GmbH Method and device for displaying local time
US6377517B1 (en) * 2000-10-17 2002-04-23 Agilent Technologies Inc. Method and system for synchronizing a time of day clock based on a satellite signal and a communication signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011004214A1 (en) * 2009-07-07 2011-01-13 Council Of Scientific & Industrial Research Improved teleclock receiver utilizing mobile telephone network

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DK1506458T3 (en) 2014-07-21
EP1506458B1 (en) 2014-04-30
DE10222853A1 (en) 2003-12-24
EP1506458A1 (en) 2005-02-16

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