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Indexed by:期刊论文

Date of Publication:2017-10-01

Journal:SENSORS

Included Journals:Scopus、SCIE、EI、PubMed

Volume:17

Issue:10

ISSN No.:1424-8220

Key Words:Vehicular Ad Hoc Networks (VANETs); Multichannel Medium Access Control (MAC); transport efficiency and infotainment applications; service channel (SCH) reservation; Quality-of-Service (QoS) support

Abstract:Vehicular Ad Hoc Networks (VANETs) employ multichannel to provide a variety of safety and non-safety (transport efficiency and infotainment) applications, based on the IEEE 802.11p and IEEE 1609.4 protocols. Different types of applications require different levels Quality-of-Service (QoS) support. Recently, transport efficiency and infotainment applications (e.g., electronic map download and Internet access) have received more and more attention, and this kind of applications is expected to become a big market driver in a near future. In this paper, we propose an Efficient and QoS supported Multichannel Medium Access Control (EQM-MAC) protocol for VANETs in a highway environment. The EQM-MAC protocol utilizes the service channel resources for non-safety message transmissions during the whole synchronization interval, and it dynamically adjusts minimum contention window size for different non-safety services according to the traffic conditions. Theoretical model analysis and extensive simulation results show that the EQM-MAC protocol can support QoS services, while ensuring the high saturation throughput and low transmission delay for non-safety applications.