WiMedia MAC Performance Beyond Gbps

An analytical formulation of the saturated throughput of prioritized contention access (PCA) in the presence of hard and soft distributed reservation protocols (DRPs) and beacon period (BP) in WiMedia MAC is presented. The analytical framework is formulated for one Hard DRP class, one Soft DRP class and N PCA classes. The state transition diagram for the ith priority PCA class is modeled by a tri-dimensional discrete-time Markov chain. One dimension of the Markov chain is for the backoff stage, the second dimension is for the value of the backoff counter, while the third dimension is mainly for the delay due to DRP transmissions or BP. Numerical results of the saturated throughput corresponding to typical parameter values as well as for higher data rates are presented. A method to achieve higher saturated throughput in WiMedia MAC is also illustrated in the numerical results section.