基于干扰矩阵的高密WLAN场景下集中式功率控制

针对高密无线局域网（WLAN）场景中系统干扰严重导致吞吐量降低的问题，提出了一种集中式动态发射功率控制算法（CDTPC）。接入控制器（AC）依据接入点（AP）定时上报的信道扫描报告和邻居报告建立干扰矩阵，通过分析干扰矩阵确定干扰源AP集和覆盖漏洞AP集，并对干扰源AP和覆盖漏洞AP进行动态功率控制，在保障覆盖的情况下减小WLAN系统内干扰、提高网络整体吞吐量。仿真表明：在高密WLAN场景中，使用CDTPC算法进行功率控制前后各AP吞吐对量均有所提高，系统整体吞吐量提高了41.5%.

Centralized transmit power control based on interference matrix in high-density WLAN environment

In view of the widespread interference problem in high-density Wireless Local Area Network(WLAN) which may reduce throughput,a centralized transmit power control algorithm called Centralized Dynamic Transmit Power Control(CDTPC) is proposed.Access point(AP) is managed centrally by access control(AC).AP regularly reports the channel scan report and neighbor AP report to AC. AC establishes the interference matrix according to the information reported by AP. AC will analyze the interference matrix to find out the AP which produces interference to others and which has less signal coverage than it should have. Then,AC will control the power of that AP in order to reduce interference and improve the system capacity. The result of simulation indicates that the algorithm can improve the total throughput in high-density WLAN environment. The total throughput improved about 41.5%.