Title :
A QoS Supported Multi-Channel MAC for Vehicular Ad Hoc Networks
Author :
Wang, Qing ; Leng, Supeng ; Zhang, Yan ; Fu, Huirong
Author_Institution :
Sch. of Commun. & Inf. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
The emerging wireless vehicular communication technology is intended to improve safety and comfort of transportation systems. Different types of traffic information could be delivered through vehicle-to-vehicle and vehicle-to-infrastructure communications. This paper proposes a Quality-of-Service (QoS) supported multi-channel MAC scheme for Vehicular Ad Hoc Networks (VANETs), which can adaptively tune the contention window for different services at each node, and dynamically adjust the intervals of the Control Channel (CCH) and the Service Channels (SCHs) working in multi-rate. Theoretical model is proposed to obtain the contention window and optimize the intervals based on traffic conditions. Analysis and simulation results show that the proposed MAC is able to help IEEE 1690.4 MAC support QoS services, while ensuring the high saturation throughput and the prioritized transmission of critical safety information.
Keywords :
access protocols; quality of service; safety; traffic; transportation; vehicular ad hoc networks; IEEE 1690.4 MAC; QoS; VANET; contention window; control channel; multichannel MAC; quality of service; service channel; traffic information; transportation system comfort; transportation system safety; vehicle-to-infrastructure communication; vehicle-to-vehicle communication; vehicular ad hoc network; wireless vehicular communication technology; Ad hoc networks; Analytical models; Delay; Markov processes; Quality of service; Safety; Throughput;
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd
Conference_Location :
Budapest
Print_ISBN :
978-1-4244-8332-7
DOI :
10.1109/VETECS.2011.5956230
