基于NS2的IEEE 802.16 Mesh模式的功能模型与仿真
摘要
IEEE 802.16 standard has specified the physical (PHY) layer and medium access control (MAC) layer of wireless metropolitan area networks. The MAC layer supports point-to-multipoint (PMP) and Mesh mode. To meet the need for a scalable simulation platform in the study of Mesh mode networks, this paper proposed the functional simulation model of Mesh mode based on the IEEE 802.16-2004 standard and NS2. In this model, it divided the operation of MAC and PHY layer of Mesh mode into several independent function modules, so that every module could be implemented using a object-oriented C++ class in NS2, and thus had scalability. Furthermore, implemented the coordinated distributed scheduling and mini-slot allocation algorithm of Mesh mode in NS2 based on this model. It designed some simulation scenarios to analyze the performance of the three-way handshaking time and throughput of the TCP flow. It proposed several suggestions to improve the performance based on the results of simulation.