| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 100 === The WiMAX network provides high speed internet multimedia service and supports a variety of types of Qos.Thus, it is important to allocate bandwidth to different class of traffic effectively in this network. The resource must be allocated effectively to guarantee the delay of real-time traffic.
An algorithm named Enhance RED-based Scheduling is proposed in this paper to improve the performance of RED-based Scheduling algorithm. In RED-based Scheduling algorithm, the packet number of each queue is found to decide the scheduled bandwidth. In this way, a queue with smaller packets tends to have larger scheduled bandwidth than it needs. It is only applicable to queues with the same packet size. Also, when the number of packets exceeds the second threshold, the deficit counter (DC) is fixed in RED-based Scheduling algorithm. Then, the connection with heavier load will have larger delay time than that with smaller load although they may be the same class. Thus, we byte length of each queue is used to decide the DC value in this paper. Also, the DC will depend on the length of queue if one queue exceeds the second threshold.
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