International Journal of Vehicular Technology
Volume 2011 (2011), Article ID 627968, 8 pages
http://dx.doi.org/10.1155/2011/627968
Research Article

Disseminating a Large Amount of Data to Vehicular Network in an Urban Area

Department of Electrical and Computer Engineering, Isfahan University of Technology, Esfahan 84156-83111, Iran

Received 13 August 2010; Accepted 31 December 2010

Academic Editor: Shaharuddin Salleh

Copyright © 2011 Mina Taheri and Faramarz Hendesi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The problem of distributing a large amount of data from multiple sources in an urban area is investigated. We explore an opportunistic approach for information collection, in which a vehicle obtains information about resources from encountered vehicles. This protocol could be applied in both dense and sparse vehicular networks. Due to the highly dynamic nature of the underlying vehicular network topology, we depart from architectures requiring centralized coordination, reliable MAC scheduling, or global network state knowledge, and instead adopt a distributed paradigm with simple protocols. In other words, a reliable dissemination is introduced from multiple sources when each node in the network shares a limited amount of its resources for cooperating with others. By using rateless coding at the Road Side Unit (RSU) and using vehicles as data carriers, an efficient way to achieve reliable dissemination to all nodes (even disconnected clusters in the network) is described.