背景流量中报文负载的字典构造方法

背景流量的构造是决定网络测试质量的重要方面. 在目前背景流量的生成中,报文的负载一般采用随机串进行全部或部分填充. 该方法容易引入误报,造成测试结果的不准确,所构造的流量中报文对被测系统的压力不可控制,在实时测试中随机串的生成降低了测试系统的性能,而在离线测试中为存储负载中的随机串需要庞大的空间. 针对这种方法的不足,设计了一种字典填充方法,报文的负载从字典中选取,而字典的内容从被测设备所能监控的网络事件的特征中提取. 该方法可以减少随机串方法所带来的问题,实验证明是有效的.

A method of constructing payload of packets in background traffic with dictionary

The background traffic generation becomes an important part for the network test.Nowadays the payload of packets in the background traffic is usually constructed with random strings.Such a method may bring about many problems,such as unexpected test results which can reduce the accuracy of the test,unexpected processing pressure to the tested system,and performance decrease of the testing system when generating the background traffic in a real-time mode.Furthermore,the storage of such random data for offline test requires much of space.To tackle these problems,a novel method is proposed,which uses the variety of the feature patterns whose ware was abstracted from possible traffic to construct a payload dictionary,and the background traffic payload was composed of the dictionary.The experiments show that this method is efficient,and can reduce the problems caused by the random payload.