The Community for Technology Leaders
Green Image
Issue No. 05 - May (2009 vol. 20)
ISSN: 1045-9219
pp: 740-752
Hongzi Zhu , Shanghai Jiao Tong University, Shanghai
Minglu Li , Shanghai Jiao Tong University, Shanghai
Yanmin Zhu , Imperial College London, London
Lionel M. Ni , Hong Kong University of Science and Technology, Hong Kong
Intelligent transportation systems have become increasingly important for the public transportation in Shanghai. In response, ShanghaiGrid (SG) project aims to provide abundant intelligent transportation services to improve the traffic condition. A challenging service in SG is to accurately locate the positions of moving vehicles in real time. In this paper, we present an innovative scheme, Hierarchical Exponential Region Organization (HERO), to tackle this problem. In SG, the location information of individual vehicles is actively logged in local nodes which are distributed throughout the city. For each vehicle, HERO dynamically maintains an advantageous hierarchy on the overlay network of local nodes to conservatively update the location information only in nearby nodes. By bounding the maximum number of hops the query is routed, HERO guarantees to meet the real-time constraint associated with each vehicle. A small-scale prototype system implementation and extensive simulations based on the real road network and trace data of vehicle movements from Shanghai demonstrate the efficacy of HERO.
Distributed applications, real-time system, RFID system, peer-to-peer network, vehicle tracking.

Y. Zhu, L. M. Ni, M. Li and H. Zhu, "HERO: Online Real-Time Vehicle Tracking," in IEEE Transactions on Parallel & Distributed Systems, vol. 20, no. , pp. 740-752, 2008.
87 ms
(Ver 3.3 (11022016))