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Conference Paper: Improved estimation of clock offset in sensor networks

TitleImproved estimation of clock offset in sensor networks
Authors
KeywordsAnalytical results
Clock offset
Clock synchronization
Exponential delay
Link delay
Issue Date2009
PublisherIEEE. The Journal's web site is located at http://www.ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000104
Citation
The IEEE International Conference on Communications (ICC 2009), Dresden, Germany, 14-18 June 2009. In Proceedings of IEEE ICC, 2009, p. 1-4 How to Cite?
AbstractClock synchronization is an important issue for the design of a network composed of small sensor nodes. Based on the two-way timing message exchange mechanism and assuming an exponential network delay distribution, many analytical results have been presented in the literature by applying the techniques from statistical signal processing. This paper derives the minimum variance unbiased estimator for the clock offset for both symmetric and asymmetric exponential delay cases. For the asymmetric delays, it is shown to be a function of both the minimum and the mean link delays. This result is a very significant contribution since only the minimum link delay observations have been used to estimate the clock offset in the past. For the symmetric case, it is shown to coincide with the maximum likelihood estimator. In addition, the result is also applicable to clock synchronization problem in general computer networks. ©2009 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/61976
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorChaudhari, QMen_HK
dc.contributor.authorSerpedin, Een_HK
dc.contributor.authorWu, YCen_HK
dc.date.accessioned2010-07-13T03:51:21Z-
dc.date.available2010-07-13T03:51:21Z-
dc.date.issued2009en_HK
dc.identifier.citationThe IEEE International Conference on Communications (ICC 2009), Dresden, Germany, 14-18 June 2009. In Proceedings of IEEE ICC, 2009, p. 1-4en_HK
dc.identifier.issn0536-1486en_HK
dc.identifier.urihttp://hdl.handle.net/10722/61976-
dc.description.abstractClock synchronization is an important issue for the design of a network composed of small sensor nodes. Based on the two-way timing message exchange mechanism and assuming an exponential network delay distribution, many analytical results have been presented in the literature by applying the techniques from statistical signal processing. This paper derives the minimum variance unbiased estimator for the clock offset for both symmetric and asymmetric exponential delay cases. For the asymmetric delays, it is shown to be a function of both the minimum and the mean link delays. This result is a very significant contribution since only the minimum link delay observations have been used to estimate the clock offset in the past. For the symmetric case, it is shown to coincide with the maximum likelihood estimator. In addition, the result is also applicable to clock synchronization problem in general computer networks. ©2009 IEEE.en_HK
dc.languageengen_HK
dc.publisherIEEE. The Journal's web site is located at http://www.ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000104-
dc.relation.ispartofProceedings of the IEEE International Conference on Communications, ICC 2009en_HK
dc.rightsIEEE International Conference on Communications. Copyright © IEEE.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rights©2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.-
dc.subjectAnalytical results-
dc.subjectClock offset-
dc.subjectClock synchronization-
dc.subjectExponential delay-
dc.subjectLink delay-
dc.titleImproved estimation of clock offset in sensor networksen_HK
dc.typeConference_Paperen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1550-3607&volume=&spage=1&epage=4&date=2009&atitle=Improved+estimation+of+clock+offset+in+sensor+networks-
dc.identifier.emailWu, YC:ycwu@eee.hku.hken_HK
dc.identifier.authorityWu, YC=rp00195en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1109/ICC.2009.5199072en_HK
dc.identifier.scopuseid_2-s2.0-70449490745en_HK
dc.identifier.hkuros160159en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70449490745&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.spage1-
dc.identifier.epage4-
dc.description.otherThe IEEE International Conference on Communications (ICC 2009), Dresden, Germany, 14-18 June 2009. In Proceedings of IEEE ICC, 2009, p. 1-4-
dc.identifier.scopusauthoridChaudhari, QM=16232189200en_HK
dc.identifier.scopusauthoridSerpedin, E=7003366947en_HK
dc.identifier.scopusauthoridWu, YC=7406894786en_HK

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