Abstract
To overcome the defect of IEEE 802.11e reference scheduler allocating fixed Transmission Opportunity(TXOP) duration,an adaptive scheduling scheme was proposed to support real-time traffic.The proposed scheduler dynamically allocated variable TXOP duration based on the traffic load information of the amount of buffered frames in each traffic stream queue sent by stations,to satisfy the requirements of different traffic under different load.By guaranteeing minimum delay of traffic,the scheduler tried to allocate TXOP for the new arrival traffic with proportional request reduction and linear programming.Detailed simulation results and comparison with IEEE 802.11e reference scheduler prove that the proposed scheduling scheme not only improves system throughput,but also decreases delay of real-time traffic.
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