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.
[1]
Huirong Fu,et al.
An Enhanced Multi-Channel MAC for the IEEE 1609.4 Based Vehicular Ad Hoc Networks
,
2010,
2010 INFOCOM IEEE Conference on Computer Communications Workshops.
[2]
Hai Le Vu,et al.
MAC Access Delay of IEEE 802.11 DCF
,
2007,
IEEE Transactions on Wireless Communications.
[3]
Qing Wang,et al.
Medium access control in vehicular ad hoc networks
,
2011,
Wirel. Commun. Mob. Comput..
[4]
Nader Moayeri,et al.
A Secure VANET MAC Protocol for DSRC Applications
,
2008,
IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference.
[5]
Hamid Menouar,et al.
A survey and qualitative analysis of mac protocols for vehicular ad hoc networks
,
2006,
IEEE Wireless Communications.