ABSTRACT
Vehicular ad hoc networks (VANETs) allow vehicles to exchange information with other vehicles [vehicle to vehicle (V2V)] and with nearby roadside infrastructures [vehicle to infrastructure (V2I)] in real time, thus providing a number of value-added services to create a safer and more efficient traffic environment. European Telecommunications Standards Institute/International Organization for Standardization (ETSI/ISO) jointly proposed a horizontal/vertical mixture as the intelligent transport systems (ITS) station reference architecture. It is essential to construct a joint optimization model incorporating communication quality and security together. This methodology seems to be the obvious way of coping with the contradictions between quality of service (QoS) and security, but it is challenged with elaborately bridging the gap between the respective concerns of communication and security considerations through suitable quantitative metrics. A power adaptive control decision should be made by the trade-off of channel capacity and security cost.
