Research And Simulation Algorithm Based On The Ieee Wireless Man Qos Framework

IEEE802.16 is a broadband wireless accesses technology that support fixed and mobile motrpolitan area network,which can be used as a best candidate of terminal postion of the communication network.Comparing with cable network,it shows more ecnomical and stable.As the major part of QoS,MAC layer data servicing algrithem that has beem the improtant uint should be optimized.This paper has introduced network topology of IEEE802.16 protocal,MAC protocal model of node,the system connection,service flows and servic types, analysed the Qos problems in implementation mechanism based on several Qos frameworks.This paper proposed a modified QoS framework and the scheduling algorithms. In particular,using EDF real-time scheduling algorithm for UGS,rtPS,ertPS,WFQ algorithm for nrtPS,simplified FIFO algorithm for BE,all algorithms aimed to saving energy.Scheduling algorithm based on the fairness principle, under meeting the higher priority service flows bandwidth, to provide best-effort services for the low priority service flows, Ensure utilization about uplink resource.Finally,this paper verified the results base on simulation in OPNET, it shows outthis architecture and these algorithms are good for use.