Resource Sharing Principles for Vehicular Communications

Specific congestion control mechanisms for wireless vehicular communications have been studied extensively in previous research. Various mechanisms with important functionality for a scalable vehicular communications system design have been identified, and their applicability for certain communications scenarios has been studied in the past. Definition of overall resource utilization principles for guiding functional specification and complementary design of congestion control tools has been a missing aspect of previous research. This paper proposes a suitable scalability principle for each major vehicular communication scenario: periodic safety broadcasts, event-driven safety broadcasts, and unicast message forwarding. Each scenario section investigates an appropriate design of individual congestion control tools for the implementation of related scalability principle. It is then described how individual tools shall complement one another.