Road′s Partition Based Multi-channel Assignment Algorithm in Urban Vehicular Ad-Hoc Network

In urban vehicular ad-hoc networks,multi-channel assignment problem is that when every network node has several interfaces,how to switch each interface between available channels(for example,802.11b/g has three available channels,while 802.11a twelve available channels) to reduce the interference between neighbor links and improve the throughput.In this paper,a road based multi-channel assignment algorithm named mimc-road is provided.In this algorithm,roads are divided into many units and every unit is assigned a channel,and the neighbor units have different channels.In this way,the two-dimensional space based network multi-channels problem is simplified to one-dimensional space based multi-channel assignment,and the dynamic channel assignment of links is converted to the static road based channels division.Experiment results show that mimc-road significantly improves the performance(throughput) of vehicular ad-hoc networks.