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dc.contributor.authorChang, Ming-Fengen_US
dc.contributor.authorChen, Chi-Huaen_US
dc.contributor.authorLin, Yi-Bingen_US
dc.contributor.authorChia, Chung-Yungen_US
dc.date.accessioned2019-04-03T06:41:18Z-
dc.date.available2019-04-03T06:41:18Z-
dc.date.issued2015-04-10en_US
dc.identifier.issn1530-8669en_US
dc.identifier.urihttp://dx.doi.org/10.1002/wcm.2384en_US
dc.identifier.urihttp://hdl.handle.net/11536/124458-
dc.description.abstractThe control signals of cellular networks have been used to infer the traffic conditions of the road network. In particular, consecutive handover events are being used to estimate the traffic speed. During traffic congestion, consecutive handover events may be rare because vehicles move slowly, and thus very few or no speed reports would be generated from the congested area.However, the traffic speed report rate during traffic congestion has not been investigated in the literature. In this paper, we present an analytic model to estimate the speed report rate from cellular network signaling in steady traffic conditions, that is, the traffic speed and flow are assumed constant. Real field trial data were used to validate our analytic model. In addition, computer simulations were conducted to study how speed reports are generated in dynamic traffic conditions when traffic speed and flow change rapidly. Our study indicates that in a typical cell of length 1.5km with a typical expected call holding time of 1min, no speed report was generated from a congested three-lane highway. Our study demonstrates that the lack of speed reports from consecutive handover events during rush hours indicates severe traffic congestion, and new methods that can estimate traffic speed from cellular network data during severe traffic congestion need to be developed. Copyright (c) 2013 John Wiley & Sons, Ltd.en_US
dc.language.isoen_USen_US
dc.subjecttraffic informationen_US
dc.subjectfloating vehicleen_US
dc.subjectCFVDen_US
dc.titleThe frequency of CFVD speed report for highway trafficen_US
dc.typeArticleen_US
dc.identifier.doi10.1002/wcm.2384en_US
dc.identifier.journalWIRELESS COMMUNICATIONS & MOBILE COMPUTINGen_US
dc.citation.volume15en_US
dc.citation.issue5en_US
dc.citation.spage879en_US
dc.citation.epage888en_US
dc.contributor.department資訊工程學系zh_TW
dc.contributor.departmentDepartment of Computer Scienceen_US
dc.identifier.wosnumberWOS:000351300900007en_US
dc.citation.woscount5en_US
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