电子测试
電子測試
전자측시
ELECTRONIC TEST
2014年
1期
36-41
,共6页
网络断层扫描%拓扑推断%traceroute%时延抖动%NS2
網絡斷層掃描%拓撲推斷%traceroute%時延抖動%NS2
망락단층소묘%탁복추단%traceroute%시연두동%NS2
network tomography%topology inference%traceroute%delay variation%NS2
网络规模的日益壮大使网络管理成为困难，网络安全也会受到一定的威胁，为了推断出更接近真实的网络拓扑结构，更好的对网络进行管理，将传统的网络拓扑推断算法与网络断层扫描技术相结合，准确的推断网络拓扑结构。根据传统网络测量方法获得节点的层次信息，通过NT技术中的四元分组列车方法获得目标节点的时延抖动，分析深度优先搜索序列的特点并计算节点间时延抖动协方差来判断节点间的相关性，进而推断出网络的拓扑结构。经过NS2仿真模拟验证表明，该算法具有更高的准确性。
網絡規模的日益壯大使網絡管理成為睏難，網絡安全也會受到一定的威脅，為瞭推斷齣更接近真實的網絡拓撲結構，更好的對網絡進行管理，將傳統的網絡拓撲推斷算法與網絡斷層掃描技術相結閤，準確的推斷網絡拓撲結構。根據傳統網絡測量方法穫得節點的層次信息，通過NT技術中的四元分組列車方法穫得目標節點的時延抖動，分析深度優先搜索序列的特點併計算節點間時延抖動協方差來判斷節點間的相關性，進而推斷齣網絡的拓撲結構。經過NS2倣真模擬驗證錶明，該算法具有更高的準確性。
망락규모적일익장대사망락관리성위곤난，망락안전야회수도일정적위협，위료추단출경접근진실적망락탁복결구，경호적대망락진행관리，장전통적망락탁복추단산법여망락단층소묘기술상결합，준학적추단망락탁복결구。근거전통망락측량방법획득절점적층차신식，통과NT기술중적사원분조열차방법획득목표절점적시연두동，분석심도우선수색서렬적특점병계산절점간시연두동협방차래판단절점간적상관성，진이추단출망락적탁복결구。경과NS2방진모의험증표명，해산법구유경고적준학성。
Due to the larger scale of network,network management is more and more difficult,and network security is also suffered a certain threat.In order to obtain the network topology structure that closed to the real network,and have a better management to network,combining traditional network topology inference with NT technology to infer the network tolology structure.The level information of nodes will be got by the traditional method,and then the delay variation will be gained through sending 4-tuple packets of NT technology.According to analyze the character of Depth first search sequence and computing the delay variation covariance to confirm the relationship of terminal nodes, and then network topology will be infered accroding to the nodes relationship.Finally it proves the improved algorithm has the higher accuracy through NS2 simulation experiment.
