Providing Differentiated Levels of Service Availability in VANET Communications

Inter-vehicle communications seems to be a promising remedy not only for a number of road-safety issues, but also to improve the efficiency of road traffic, as well as to support the on-board infotainment applications. However, it often encounters disruptions due to high mobility of vehicles causing frequent failures of communication links. In this paper, we utilize the idea of multipath vehicle-to-vehicle routing to provide protection against link failures. Three original contributions, presented for the general case of differentiated velocities and directions of vehicles include: 1) probability analysis of end-to-end multipath transmission availability; 2) the concept of differentiated levels of service availability and its application to an example AODV routing scheme; 3) a metric of link costs to increase the lifetime of communication paths.