IEEE 802.11p EDCA performance analysis for vehicle-to-vehicle infotainment applications

This paper proposes two Markovian models to analyze the performance of IEEE 802.11p EDCA mechanism for vehicle-to-vehicle (V2V) infotainment applications. The first model describes the backoff procedure and is used to compute the transmission probability of each access category (AC) while the second illustrates the contention phase after a busy channel and is used to derive the probability of collision. Both models consider backoff counter freezing as well as the internal and external collisions. In addition, they both take into account the case where the channel is sensed busy once the counter backoff reaches 0, which is not considered in almost all of existing works in the literature. Using both models, we derive an accurate formula for the normalized throughput for each AC. Simulation results are provided to demonstrate the accuracy of our analytical model.