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The Scientific World Journal
Volume 2014 (2014), Article ID 359636, 12 pages
http://dx.doi.org/10.1155/2014/359636
Research Article

Reliable Multihop Broadcast Protocol with a Low-Overhead Link Quality Assessment for ITS Based on VANETs in Highway Scenarios

1Information Technology Laboratory, Center for Research and Advanced Studies (Cinvestav), Science & Technology Park TECNOTAM, Km. 5.5 Cd. Victoria-Soto La Marina Highway, 87130 Ciudad Victoria, TAMPS, Mexico
2Center for Scientific Research and Higher Education at Ensenada (CICESE), 22860 Ensenada, BC, Mexico

Received 8 March 2014; Accepted 21 June 2014; Published 15 July 2014

Academic Editor: Jingjing Zhou

Copyright © 2014 Alejandro Galaviz-Mosqueda et al. 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

Vehicular ad hoc networks (VANETs) have been identified as a key technology to enable intelligent transport systems (ITS), which are aimed to radically improve the safety, comfort, and greenness of the vehicles in the road. However, in order to fully exploit VANETs potential, several issues must be addressed. Because of the high dynamic of VANETs and the impairments in the wireless channel, one key issue arising when working with VANETs is the multihop dissemination of broadcast packets for safety and infotainment applications. In this paper a reliable low-overhead multihop broadcast (RLMB) protocol is proposed to address the well-known broadcast storm problem. The proposed RLMB takes advantage of the hello messages exchanged between the vehicles and it processes such information to intelligently select a relay set and reduce the redundant broadcast. Additionally, to reduce the hello messages rate dependency, RLMB uses a point-to-zone link evaluation approach. RLMB performance is compared with one of the leading multihop broadcast protocols existing to date. Performance metrics show that our RLMB solution outperforms the leading protocol in terms of important metrics such as packet dissemination ratio, overhead, and delay.