使用定向天线的骨干无线网格网络容量研究

Capacity of a backbone wireless mesh network using directional antennas

定向天线能够提高无线网格网络(WMN)的空间复用率,因而影响了WMN的容量。虽然目前许多文献已经提出使用定向天线的介质访问控制方案、路由协议和拓扑控制方法去提高MWN的性能,但是在理论上研究配置定向天线的MWN的容量仍然是必要的。用渐进的分析方法对使用定向天线的骨干WMN的容量进行了研究,分析了定向天线对容量的影响,并推导出网格路由器平均吞吐量上限。结果表明在接入点数量达到一定的门限时,定向天线的使用有效地增大了网络的容量。

Directional antennas can improve spatial reuse of Wireless Mesh Setworks （WMNs） and affect the capacity of WMNs. Although some medium access control schemes, routing protocols and topology control methods of directional antennas have been recently proposed to improve the performance of WMN, it is still a need to analyze the capacity of WMNs deployed with directional antennas. This paper studied the capacity of a large backbone WMN using directional antennas by asymptotic analysis methods, investigated the effect of directional antennas on capacity and derived the upper bound of the per-router throughput. The results show that when the number of access points increases to some threshold, using directional antennas will improve the capacity of WMNs.