Communication between vehicles based on ad-hoc networking principles has become a prominent research area. The main difficulties in designing such vehicle-to-vehicle (V2V) networks arise from the lack of infrastructure, necessitating fully distributed functionalities and self-organizing capabilities, and from their highly dynamic nature due to the mobility of nodes. A new research goal is to use V2V networks to realize autonomous vehicles which can cooperate in terms of cognition and trajectory planning while participating in traffic. This specific scenario imposes additional and very strict requirements on the communication network design. In this paper we present the requirements for the communication system and its security. Additionally, we present the essential building blocks and mechanisms to tune existing technologies for use in the autonomous vehicles scenario.
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