Transform Free Modeling of Finite Buffer Non-Saturated IEEE 802.11 DCF in Ad Hoc Networks

Many analytical models for performance evaluation of non-saturated IEEE 802.11 DCF utilizing finite buffer have been proposed in last two decades. In order to determine service time and other key parameters most of these models utilized the mathematical concept of transform inversion algorithm. Although, the existing approach is effective but it is complex and computationally intensive. This paper presents a transform free approach for computing various key performance parameters in simple and fast manner. The use of renewal theory approach for determining collision probability leads to simplicity and easy to work with mathematical process. The results obtained from the proposed method are accurate and validated through ns-2 simulations.