ABSTRACT
In this chapter, we focus on routing in cognitive vehicular networks. Compared to other wireless networks, vehicular networks have a considerably more dynamic nature due to the speed of the vehicles. Connectivity changes rapidly as vehicles move around, as well as the channel properties due to the changes in the landscape. For the cognitive vehicular networks, another consideration is the rapid change in channel availability; as vehicles move, they go in and out of transmission range of primary users. Therefore, routing in cognitive vehicular networks is a very challenging task. We investigate conventional routing schemes in mobile ad hoc networks and also vehicular networks. We point out how they are not directly usable for cognitive vehicular networks and point out possible extensions to these schemes. We also lay out exploitable features of cognitive vehicular networks and indicate what can be done to take advantage of these feature. We investigate routing in CVNs according to various criteria such as communication paradigm, and routing approach.
