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论文类型：期刊论文

发表时间：2017-10-01

发表刊物：SENSORS

收录刊物：Scopus、SCIE、EI、PubMed

卷号：17

期号：10

ISSN号：1424-8220

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

摘要：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.