A New Hybrid Model for Performance Evaluation of IEEE 802.11p Broadcast Mode in Vehicular Ad Hoc Networks: A Numerical Analysis

In this paper, we will propose a new methodology for performance modeling of IEEE 802.11p medium access control (MAC) sub-layer in broadcast mode. In most of the current works, it is assumed that the number of contending nodes is deterministic and constant. However, in vehicular ad hoc networks, we can observe a kind of uncertainty in number of contending vehicles, which try to get access to the shared wireless channel. This uncertainty can affect the performance analysis of MAC protocols in vehicular environments. In this paper, we will try to model the dynamicity of number of contending vehicles based on the distribution of vehicles' velocity. This model will be combined with the current methodologies used in performance evaluation of distributed MAC protocols, such as IEEE 802.11p. The resulting hybrid model has the ability to provide us with more insightful analysis about the performance of the standard under various traffic conditions.