The handbook of ad hoc wireless networks
The handbook of ad hoc wireless networks
Challenges of intervehicle ad hoc networks
IEEE Transactions on Intelligent Transportation Systems
Performance analysis of IEEE 802.11e contention-based channel access
IEEE Journal on Selected Areas in Communications
A new routing algorithm for sparse vehicular ad-hoc networks with moving destinations
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Bit-Based fairness in IEEE802.11p MAC for vehicle-to-infrastructure networks
ADCONS'11 Proceedings of the 2011 international conference on Advanced Computing, Networking and Security
Proceedings of the International Conference on Advances in Computing, Communications and Informatics
A context-aware MAC protocol for VANETs
WASA'13 Proceedings of the 8th international conference on Wireless Algorithms, Systems, and Applications
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Vehicular ad hoc networks (VANets) are special cases of mobile ad hoc networks (MANets) in which the mobility pattern is very different. Actually, the topology of the network in VANets changes more often and the variance of speeds is high. Such characteristics lead to fairness problem in VANets, considered in this paper. In fact, vehicles with different speeds have their different limited time to communicate with an access point (AP). This attribute adversely affects the chance of a fast moving vehicle in communicating with the access point. We propose a modified 802.11 DCF channel access scheme as a solution to the problem. The proposed scheme adjusts the probability of transmission at a time slot for each node according to its speed. To this end, we change the probability of transmission through changing the minimum contention window size. In this respect, we obtain some relations between speed and window size through analytical approximations. Simulation results indicate the validity of our approximations and the efficiency of the proposed MAC scheme in solving the fairness problem.