基于IEEE 802.11的无线组播网络性能研究与验证

Performance research and validation of wireless multicast network based on IEEE 802.11

现有的关于IEEE 802.11无线传输协议性能的研究集中于基于IEEE 802.11协议的单播传输,鲜有对于基于IEEE 802.11协议的组播传输性能理论研究。基于此,采用理论分析建模与仿真实验验证相结合的方法,建立组播分布式协调功能(DCF)模型,并结合物理层调制及信道模型,研究网络吞吐量、传输距离等IEEE 802.11无线组播传输的性能,并计算无线组播的吞吐量门限。NS-3仿真实验结果表明,此模型能够较为准确地描述基于IEEE 802.11协议无线组播的数据传输特性,提高建立模型研究基于IEEE 802.11无线组播的准确性;同时给出的无线网络传输门限能够为网络设计和网络优化提供参考。

The research on the performance of available IEEE 802.11 wireless transmission protocol mostly focuses on the unicast transmission based on IEEE 802.11 protocol,but it is rare to perform the theoretical research on performance of the multicast transmission based on IEEE 802.11 protocol.Therefore,a multicast distributed coordination function(DCF)model is established by means of the method combining theoretical analysis modeling and simulation experiment verification.The physical layer modulation and channel model are combined to study the network throughput,transmission distance,and performance of wireless multicast transmission based on IEEE 802.11 protocol,and then the throughput threshold of the wireless multicast is calculated.The results of the NS-3 simulation experiment prove that the model can accurately describe the data transmission characteristics of wireless multicast based on IEEE 802.11 protocol,improve the accuracy of establishing the model to research the wireless multicast based on IEEE 802.11 protocol.The threshold of wireless network transmission is given,which can provide a reference for the network design and network optimization.