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Conference Paper: Improved estimation of clock offset in sensor networks
Title | Improved estimation of clock offset in sensor networks |
---|---|
Authors | |
Keywords | Analytical results Clock offset Clock synchronization Exponential delay Link delay |
Issue Date | 2009 |
Publisher | IEEE. 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? |
Abstract | Clock 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 Identifier | http://hdl.handle.net/10722/61976 |
ISSN | 2023 SCImago Journal Rankings: 0.861 |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chaudhari, QM | en_HK |
dc.contributor.author | Serpedin, E | en_HK |
dc.contributor.author | Wu, YC | en_HK |
dc.date.accessioned | 2010-07-13T03:51:21Z | - |
dc.date.available | 2010-07-13T03:51:21Z | - |
dc.date.issued | 2009 | en_HK |
dc.identifier.citation | The IEEE International Conference on Communications (ICC 2009), Dresden, Germany, 14-18 June 2009. In Proceedings of IEEE ICC, 2009, p. 1-4 | en_HK |
dc.identifier.issn | 0536-1486 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/61976 | - |
dc.description.abstract | Clock 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.language | eng | en_HK |
dc.publisher | IEEE. The Journal's web site is located at http://www.ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000104 | - |
dc.relation.ispartof | Proceedings of the IEEE International Conference on Communications, ICC 2009 | en_HK |
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.subject | Analytical results | - |
dc.subject | Clock offset | - |
dc.subject | Clock synchronization | - |
dc.subject | Exponential delay | - |
dc.subject | Link delay | - |
dc.title | Improved estimation of clock offset in sensor networks | en_HK |
dc.type | Conference_Paper | en_HK |
dc.identifier.openurl | http://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.email | Wu, YC:ycwu@eee.hku.hk | en_HK |
dc.identifier.authority | Wu, YC=rp00195 | en_HK |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1109/ICC.2009.5199072 | en_HK |
dc.identifier.scopus | eid_2-s2.0-70449490745 | en_HK |
dc.identifier.hkuros | 160159 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-70449490745&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.spage | 1 | - |
dc.identifier.epage | 4 | - |
dc.description.other | The IEEE International Conference on Communications (ICC 2009), Dresden, Germany, 14-18 June 2009. In Proceedings of IEEE ICC, 2009, p. 1-4 | - |
dc.identifier.scopusauthorid | Chaudhari, QM=16232189200 | en_HK |
dc.identifier.scopusauthorid | Serpedin, E=7003366947 | en_HK |
dc.identifier.scopusauthorid | Wu, YC=7406894786 | en_HK |
dc.identifier.issnl | 0536-1486 | - |