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dc.contributor.authorCheng, Chien-Mingen_US
dc.contributor.authorTsao, Shiao-Lien_US
dc.date.accessioned2015-07-21T08:29:21Z-
dc.date.available2015-07-21T08:29:21Z-
dc.date.issued2015-03-01en_US
dc.identifier.issn0018-9545en_US
dc.identifier.urihttp://dx.doi.org/10.1109/TVT.2014.2329015en_US
dc.identifier.urihttp://hdl.handle.net/11536/124534-
dc.description.abstractIntelligent transportation system (ITS) services have attracted significant attention in recent years. To support ITS services, architecture is required to retrieve information and data from moving vehicles and roadside facilities in an efficient manner. A two-tier system that integrates low-tier vehicular ad hoc networks (VANETs) and a high-tier infrastructure-based peer-to-peer (P2P) overlay, which can achieve a high lookup success rate and low lookup latency for information retrieval, has been developed. However, conventional information lookups in the two-tier VANET/P2P system may introduce extra lookup messages and latencies because the lookup queries are simultaneously performed over the VANET/P2P networks. This paper proposes an adaptive lookup protocol for the two-tier VANET/P2P system to improve the efficiency of information retrieval. The proposed protocol uses a Bloom filter, which is a space-efficient data structure, to collect reachability information of road segments; therefore, adaptive routing of queries between low-and high-tier networks according to reachability probability can be employed. Simulations based on the SUMO traffic simulator and QualNet network simulator demonstrate that compared with the conventional two-tier lookup mechanism, the adaptive lookup protocol can reduce the lookup latency by 12%, reduce the P2P lookup overhead by 20%-33%, and achieve a high success rate in information lookups.en_US
dc.language.isoen_USen_US
dc.subjectInformation retrievalen_US
dc.subjectintelligent transportation systems (ITS)en_US
dc.subjectpeer-to-peer (P2P) computingen_US
dc.subjectvehicular networken_US
dc.titleAdaptive Lookup Protocol for Two-Tier VANET/P2P Information Retrieval Servicesen_US
dc.typeArticleen_US
dc.identifier.doi10.1109/TVT.2014.2329015en_US
dc.identifier.journalIEEE TRANSACTIONS ON VEHICULAR TECHNOLOGYen_US
dc.citation.volume64en_US
dc.citation.spage1051en_US
dc.citation.epage1064en_US
dc.contributor.department資訊工程學系zh_TW
dc.contributor.departmentDepartment of Computer Scienceen_US
dc.identifier.wosnumberWOS:000351459600017en_US
dc.citation.woscount0en_US
Appears in Collections:Articles