文章基本信息

标题：HCBLS: A Hierarchical Cluster-Based Location Service in Urban Environment
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作者：Raik Aissaoui ; Amine Dhraief ; Abdelfettah Belghith 等
期刊名称：Mobile Information Systems
印刷版ISSN：1574-017X
出版年度：2015
卷号：2015
DOI：10.1155/2015/490191
出版社：Hindawi Publishing Corporation
摘要：Vehicle location information is central to many location-based services and applications in VANETs. Tracking vehicles positions and maintaining an accurate up-to-date view of the entire network are not easy due to the high mobility of vehicles and consequently rapid topology changes. The design of a scalable, accurate, and efficient location service is still a very challenging issue. In this paper, we propose a lightweight hierarchical cluster-based location service in city environments (HCBLS). HCBLS integrates a logical clustering based on the city digital map and consequently does not involve extra signaling overhead. An advanced location update aggregation at different levels of the assumed hierarchy is adopted to maintain up-to-date and accurate location information. Simulation results show that HCBLS achieves much better performances than the Efficient Map-Based Location Service (EMBLS) and any regular (non-cluster-based) updating scheme. HCBLS increases the success rate by around 10%, improves the overview of the network by more than 30%, lowers the location update and query costs by more than 7 times, lowers the message delivery latency by around 3 times, and presents around 4 times better localization accuracy.