Wireless Mesh Network Qos Scheduling Algorithm

Packet scheduling algorithm, an important component for wireless resource management, allocates the available system resources among various business to meet quality of service and improve system throughput, reduce delay according to the packet data and different QoS requirements. Cable network packet scheduling algorithm has been a good solution to the allocation problem of fairness, but they should not be directly applied to wireless communication network, which is due to the wireless network particularity such as dynamic changes on channel capacity, bandwidth-constrained, high link error rate, channel error location and a sudden and so on. Therefore, combination the existing cable network scheduling algorithm and MAC layer protocol of IEEE 802.16 Wireless Mesh Network, characteristics of WMAN business, putting forward the more advanced scheduling algorithm to meet the QoS requirements of more business to ensure fairness among users has been become a research hotpot now.Probabilistic Priority scheduling algorithm is based on the situation of the balanced queues to be scheduled, if one or parts of them appears unexpected flows, which will cause the whole network performance degradation, destruction of fairness. This paper focus on the indemnification mechanism based on the MAC layer QoS of the IEEE 802.16 Wireless Mesh Network, analysis various types of scheduling algorithms, especially on the characteristics and advantages and disadvantages of Probabilistic Priority scheduling algorithm performance. On this background, this paper puts forward an improvement algorithm, that is, a Dynamic Probability Priority scheduling algorithm, which can distinguish various types of services and schedule them according to their requirements, primely solve the fair scheduling problem in mobile network resources. The simulation results show that the algorithm guarantees the fair scheduling of resources, improve the network performance in wireless networks.