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dc.contributor.authorIantosca, Carmelo-
dc.contributor.authorHeitz, Christoph-
dc.contributor.authorWeibel, Hans-
dc.date.accessioned2018-03-28T09:54:08Z-
dc.date.available2018-03-28T09:54:08Z-
dc.date.issued2005-
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/4392-
dc.description.abstractThe clock synchronization method described in IEEE 1588 is often used in closed and application specific networks, e.g. for distributed measurement or automation and control applications. These networks can be equipped with special switches working as boundary or transparent clocks. In non IEEE 1588 aware switched networks such as Intranets, Metro Ethernets, MPLS or EFM Networks, the method has to cope with uncorrected stochastic message transit delays. We investigate the problem of synchronizing clocks in the presence of stochastic delays of PTP messages caused by queuing in switches. Especially in the case of heavy network traffic, queues may be filled and can lead to substantial delay of PTP messages. The aim of the presented approach is to ensure synchronization even with such large perturbations. Measurements in a simple laboratory switched fast Ethernet network showed that transit delays in the order of magnitude of some milliseconds may arise under heavy traffic. A simple synchronization algorithm fails under these circumstances. A synchronization algorithm was developed that is based on a generic statistical approach and explicitly takes into account the stochastic properties of the transit delay of PTP messages both in the case of delay and in the case of unhindered message flow. By using robust statistical estimation methods it is possible to estimate the drift and the time offset between master and slave reliably, even under strong stochastic perturbations. With this approach, time synchronization in already existing networks can be improved significantly.de_CH
dc.language.isoende_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectEstimationde_CH
dc.subjectSynchronisationde_CH
dc.subjectReal-timede_CH
dc.subject.ddc621.3: Elektro-, Kommunikations-, Steuerungs- und Regelungstechnikde_CH
dc.titleSynchronizing IEEE 1588 clocks under the presence of significant stochastic network delaysde_CH
dc.typeKonferenz: Sonstigesde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitut für Datenanalyse und Prozessdesign (IDP)de_CH
zhaw.conference.details2005 Conference on IEEE 1588, Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, Winterthur, 10-12 Oktober 2005de_CH
zhaw.funding.euNode_CH
zhaw.originated.zhawYesde_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.publication.reviewPeer review (Abstract)de_CH
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Iantosca, C., Heitz, C., & Weibel, H. (2005). Synchronizing IEEE 1588 clocks under the presence of significant stochastic network delays. 2005 Conference on IEEE 1588, Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, Winterthur, 10-12 Oktober 2005.
Iantosca, C., Heitz, C. and Weibel, H. (2005) ‘Synchronizing IEEE 1588 clocks under the presence of significant stochastic network delays’, in 2005 Conference on IEEE 1588, Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, Winterthur, 10-12 Oktober 2005.
C. Iantosca, C. Heitz, and H. Weibel, “Synchronizing IEEE 1588 clocks under the presence of significant stochastic network delays,” in 2005 Conference on IEEE 1588, Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, Winterthur, 10-12 Oktober 2005, 2005.
IANTOSCA, Carmelo, Christoph HEITZ und Hans WEIBEL, 2005. Synchronizing IEEE 1588 clocks under the presence of significant stochastic network delays. In: 2005 Conference on IEEE 1588, Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, Winterthur, 10-12 Oktober 2005. Conference presentation. 2005
Iantosca, Carmelo, Christoph Heitz, and Hans Weibel. 2005. “Synchronizing IEEE 1588 Clocks under the Presence of Significant Stochastic Network Delays.” Conference presentation. In 2005 Conference on IEEE 1588, Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, Winterthur, 10-12 Oktober 2005.
Iantosca, Carmelo, et al. “Synchronizing IEEE 1588 Clocks under the Presence of Significant Stochastic Network Delays.” 2005 Conference on IEEE 1588, Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems, Winterthur, 10-12 Oktober 2005, 2005.


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