Saturated Delay of PCA with Hard DRPs in WiMedia MAC

摘要

An analytical formulation of the saturated delay of Prioritized Contention Access (PCA) in the presence of Hard Distributed Reservation Protocols (DRPs) and Beacon Period (BP) in WiMedia MAC is presented. The analytical framework is formulated for one Hard 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. A numerical result of the saturated delay corresponding to typical parameter values is presented.