An intelligent transmission controller for TDMA/PRMA wireless multimedia communication systems

摘要

In this paper, an intelligent transmission controller (ITC) with multi-QoS medium access control (MAC) algorithm for TDMA/PRMA wireless multimedia communication systems is studied. A mini-slot technique is adopted in the proposed MAC protocol for reducing contention cost, and these mini-slots are further partitioned into multiple MAC regions where various MAC regions are for access requests coming from different QoS (quality-of-service)-class users with their respective access probabilities. Meanwhile, ITC is designed to adaptively adjust these MAC regions and access probabilities to enhance the MAC efficiency under QoS constraints. ITC mainly contains a neural/fuzzy transmission controller which has PRNN (pipeline recurrent neural network) traffic predictors, a fuzzy MAC threshold estimator, and a fuzzy access controller. Simulation results show that the proposed multi-QoS MAC algorithm with ITC can guarantee QoS requirement and has less data packet delay and higher achievable system utilization, compared to previous PRMA, IPRMA and FRMA protocols.