Title: Hybrid alternative receiver-sender approach with a coloured DR/BDR mechanism for the broadcast of safety messages in VANETs

Authors: Amira Benaidja; Samira Moussaoui; Farid Naït-Abdesselam

Addresses: RIIMA Laboratory, USTHB University, P.O. Box 32, Al alia, Algiers, Algeria ' RIIMA Laboratory, USTHB University, P.O. Box 32, Al alia, Algiers, Algeria ' LIPADE Laboratory, Paris Descartes University, 45 rue des Saints Pères, 75270 Paris Cedex 06, France

Abstract: Multi-hop broadcasting represents the key technique to disseminate warning messages in vehicular networks. Its core problem is how to minimise the number of redundantly received messages while maintaining good latency and reachability that are hard to achieve simultaneously owing to the vehicles mobility and the lossy wireless channel. The proposed Sender-Oriented approaches delay the rebroadcast and cannot ensure reliability. Receiver-oriented ones, which are most suitable for safety applications, have to benefit in an efficient way from the exchanged IEEE802.11P safety beacons. In this paper, we propose an alternative Receiver-Sender approach that combines advantages of the two existing approaches to ensure low latency and high reliability. To overcome the unreliability and broadcast overhead generated by periodic rebroadcasts and multiple relay schemes, we introduce a designated relay (DR)/backup designated relay (BDR) mechanism where the BDR has to replace the DR when detecting its failure in informing concerned vehicles based on exchanged coloured beacons. Simulations show that combining the two approaches with the DR/BDR mechanism has a better performance than using each approach separately.

Keywords: VANETs; vehicular ad hoc networks; safety applications; hybrid alternative receiver-sender approach; coloured DR/BDR mechanism; warning messages.

DOI: 10.1504/IJAHUC.2017.086264

International Journal of Ad Hoc and Ubiquitous Computing, 2017 Vol.26 No.2, pp.129 - 136

Received: 13 Oct 2014
Accepted: 18 May 2015
Published online: 04 Sep 2017 *

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