Abbas, G, Abbas, ZH, Haider, S, Baker, T, Boudjit, S and Muhammad, F (2019) PDMAC: A Priority-based Enhanced TDMA Protocol for Warning Message Dissemination in VANETs. Sensors, 20 (1). ISSN 1424-8220

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Abstract

Vehicular Ad hoc Networks (VANETs) are the key enabling technology for intelligent transportation systems. Carrier-Sense Multiple Access with Collision Avoidance (CSMA/CA) is the de facto media access standard for inter-vehicular communications, but its performance degrades in high-density networks. Time-Division Multiple Access (TDMA)-based protocols fill this gap to a certain extent, but encounter inefficient clock synchronization and lack of prioritized message delivery. To this end, we propose a Priority-based Direction-aware Media Access Control (PDMAC) as a novel protocol for intra-cluster and inter-cluster clock synchronization. Furthermore, PDMAC pioneers a three-tier priority assignment technique to enhance warning messages delivery by taking into account the direction component, message type, and severity level on each tier. Analytical and simulation results validate the improved performance of PDMAC in terms of clock synchronization, channel utilization, message loss rate, end-to-end delays and network throughput, as compared with eminent VANET MAC protocols.

Item Type:	Article
Uncontrolled Keywords:	0502 Environmental Science and Management, 0602 Ecology, 0301 Analytical Chemistry, 0906 Electrical and Electronic Engineering
Subjects:	Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions:	Computer Science & Mathematics
Publisher:	MDPI
Date Deposited:	17 Dec 2019 11:54
Last Modified:	04 Sep 2021 08:15
DOI or ID number:	10.3390/s20010045
URI:	https://researchonline.ljmu.ac.uk/id/eprint/11923

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