Mobile-assisted frame-based PRMA protocol for integration of voice and data services in broadband wireless access networks

This paper presents a mobile-assisted frame-based PRMA (MAF-PRMA) protocol, which optimizes random access control between heterogeneous traffic aiming at more efficient voice/data integrated services in dynamic reservation TDMA-based broadband wireless access networks. In order to achieve a differentiated quality-of-service (QoS) guarantee for individual service plus maximal system resource utilization, the MAF-PRMA independently controls the random access parameters, frame-by-frame basis. In addition, we have adopted a mobile-assisted random access mechanism where the voice terminal readjusts a global permission probability from the central controller, to handle the ´fair access´ issue resulting from distributed queuing problems inherent in the access network. Our extensive simulation results indicate that the MAF-PRMA achieves significant improvements in terms of voice capacity, delay, and fairness over most of the existing MAC schemes for the integrated services.