Opportunistic scheduling for next generation wireless LANs /

Official URL: http://risc01.sabanciuniv.edu/record=b1160395 (Table of Contents)

The multiuser diversity phenomenon has been exploited via opportunistic scheduling for increasing system throughput in wireless networks recently. Frame aggregation which increases the MAC efficiency is another method in enhancing system throughput. Opportunistic scheduling has been employed jointly with frame aggregation in order to maximize the system throughput in this work. The use of existing opportunistic schemes has been shown not to be optimal when frame aggregation is used, as applied in the IEEE 802.1 In Wireless Local Area Network standard. New scheduling approaches which combine channel states with queue states have been proposed with the aim of maximizing the total network throughput. In addition to schedulers which select transmitted users according to instantaneous scheduling metrics, schedulers which maximize throughput over larger time intervals have been proposed. These schedulers utilize results obtained from the queuing model developed for 802.1 In throughout this thesis. The proposed new algorithms are shown to offer significant improvement in network throughput over non-opportunistic and greedy schedulers through detailed simulations. The developed algorithms also provide a good compromise between throughput and fairness. The effect of incorporating relaying in schedulers applied for frame aggregation systems has also been analyzed.