Hybrid centralised MAC protocol for reliable broadcast of safety messages in vehicular ad hoc network. (2018)

• Record Type: Journal Article
• Authors: Boulila, Narjes; Hadded, Mohamed; Laouiti, Anis; Saidane, Leila Azouz
• Is Part Of: International journal of space-based and situated computing. Volume 8:Number 3(2018)
• Page Start: 169
• Page End: 178
• Publication Date: 2018
• Subjects: 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 80211p -- ad hoc network -- hybrid MAC; Computer networks -- Periodicals; Wireless communication systems -- Periodicals; Interactive computer systems -- Periodicals; 004.6
• Languages: English
• ISSNs: 2044-4893

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.