An estimator for delay distributions in packet-based wireless digital communication systems

It is suggested that packet-based wireless digital communication systems should be represented by discrete-time queueing models. On the basis of the Effective Capacity model, we characterise the probability distribution of a delay process in a digital system by two parameters, namely, the probability of non-zero delay and the success probability of a connection. An estimator that estimates these two parameters is mathematically derived. We consider non-ARQ traffic over the IEEE 802.16-2004 WiMAX systems as an example and establish a cross-layer simulation platform for such an example. The estimator is tested through simulation and results show that the empirical results from the simulation platform are close to estimation results.