关键词: 网络测量技术, 网络性能, 主被动结合, 信息筛选, 动态路由测量

Abstract:

Network measurement technology can effectively help network researchers and managers better understand network performance and structure. It is difficult to achieve accurate and effective measurement of network information in view of single active or passive measurement technology. Therefore, this paper proposes a network measurement technique combining active and passive. The regular expression-based matching and information filtering mechanism is used to extract effective data information while the data obtained by the passive measurement method. Based on this information, an active packet-sending method with periodic dynamic adjustment is proposed to measure the packet loss rate of the target network, and the measurement data of the packet loss rate is collected by using the Poisson distribution sampling method. Meanwhile, a multipath dynamic routing measurement algorithm is proposed to measure the number of hops of the routing path of the target network. The experimental results show that the active packet-sending method with periodic dynamic adjustment can reduce the link loss rate by more than 60% compared with the measurement method of fixed-cycle packet transmission. Compared with Traceroute and Dijkstra route-finding detection methods, the multi-path dynamic route measurement method has a small difference in route detection accuracy, but the average route tracking time is reduced by about 10% and 42%, respectively. The results show that the active packet-sending method with periodic dynamic adjustment can appropriately adjust the routing period in the burst period of the network, and the multi-path dynamic routing measurement method can effectively reduce the average routing tracking time in the detection process.

Key words: network measurement technology, network performance, active and passive combination, information screening, dynamic routing measurement