Reliability and survivability of vehicular ad hoc networks

Vehicular ad hoc network (VANET) is a technology that enables communication amongst the vehicles by creating mobile Internet. The primary purpose of VANET is road safety and security, besides private communication. Hence reliability and survivability of the network become matters of prime concern. Reliability and survivability of the network is immensely dependent upon channel availability and the hardware involved in communication. Hence, in this paper, the reliability of the vehicles and RSUs, is analyzed using reliability block diagrams. The survivability of network is explored in terms of the message lost due to unreliable hardware or channel unavailability. By using the technique of hierarchical modeling and Markov reward model, the message loss is evaluated for two types of communication in VANET namely, vehicle-to-vehicle and vehicle-to-roadside communication. The numerical results are illustrated graphically followed by their detailed analysis.