Title: Hybrid centralised MAC protocol for reliable broadcast of safety messages in vehicular ad hoc network
Authors: Narjes Boulila; Mohamed Hadded; Anis Laouiti; Leila Azouz Saidane
Addresses: RAMSIS Team, CRISTAL Laboratory, 2010 Campus University, Manouba, Tunisia ' RITS Project-Team, INRIA Paris, 2 rue Simone Iff, 75589 Paris Cedex 12, France ' SAMOVAR, Télécom SudParis, CNRS, Université Paris-Saclay, 9 rue Charles Fourier 91011 Evry, France ' RAMSIS Team, CRISTAL Laboratory, 2010 Campus University, Manouba, Tunisia
Abstract: Several medium access control (MAC) protocols were proposed to provide high-performance for vehicular ad hoc network (VANET). For instance, the contention-free MAC allows several vehicles to share the same communication channel. However, contention-based MAC protocols do not require any predefined schedule where each node competes for channel access when it needs to transmit data without any guarantee of success transmission. Hence, a hybrid MAC protocol that adopts time division multiple access (TDMA) and carrier sense multiple access (CSMA/CA) is required to enhance the network performance. Nevertheless, hybrid MAC protocols cannot ensure services differentiation so that critical messages and non-security messages have the same priority. To overcome such limitation, this paper focuses on the design of a novel access method integrating TDMA and enhanced distributed channel access (EDCA) in unique architecture called QoS-aware centralised hybrid MAC protocol (QCH-MAC). To prove the efficiency of our proposal, the latter was implemented in ns-3.
Keywords: vehicular ad hoc network; VANET; carrier sense multiple access with collision avoidance; CSMA/CA; enhanced distributed channel access; EDCA; time division multiple access; TDMA; IEEE 802.11p; ad hoc network; hybrid MAC.
International Journal of Space-Based and Situated Computing, 2018 Vol.8 No.3, pp.169 - 178
Received: 16 Aug 2018
Accepted: 21 Oct 2018
Published online: 08 Jan 2019 *