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准确判别无线局域网的误码丢包原因是优化其性能的关键.现有COLLIE方法可实时判别WLAN的误码丢包原因,但存在通信开销大,判别准确度不高等问题.本文提出一种改进的802.11 WLAN误码丢包原因判别方法,利用误码包末尾比特误码概率更高的特点,实验验证了误码包末尾1500比特与误码包整体有相似的误码特征,故只回送末尾1500比特进行误码特征分析,并在获得误码特征指标集后使用贝叶斯分类算法进行丢包原因判别.实验结果表明,与COLLIE相比,本文方法的判别准确性提高约10%,而通信开销则降低约50%.
Accurately determine the reason of error packet loss in wireless local area network is the key to optimize its performance.The existing COLLIE method can determine the cause of packet loss in WLAN in real time but has some problems such as large communication overhead and low accuracy of identification. 802.11 WLC error packet loss reason identification method, the use of the error bit error rate at the end of the packet higher bit error rate characteristics of the experiment proved that the end of the error packet 1500 bit and the error packet as a whole have similar error characteristics, so only the end 1500 bit, and the Bayesian classification algorithm is used to determine the cause of packet loss after the bit error feature index set is obtained.The experimental results show that compared with COLLIE, the accuracy of this method is improved by about 10% Communication overhead is reduced by about 50%.