A Dynamic Geocast Solution to Support Cooperative Adaptive Cruise Control (CACC) Merging

Cooperative Adaptive Cruise Control (CACC) is a type of cruise control in which the speed of a vehicle is controlled based on wireless communication between vehicles. In this paper we tackle the communication needed in case of fully automatic CACC merging at a junction. The first contribution of our paper is to show that to target the vehicles involved we need a special kind of geocast that takes both the geographical location and the dynamics (speed, acceleration) of a vehicle into account. The second contribution is to give a first approach to such a geocast solution. The resulting geocast protocol is able to target multiple destination sets that are geographically dispersed and that are persistent in time. This paper does not yet include an analysis of the protocol, but analyses by means of simulation and real-world testing have already been planned.