本文選題：網(wǎng)絡(luò)測(cè)量 + 網(wǎng)絡(luò)時(shí)延��； 參考：《北京郵電大學(xué)》2014年碩士論文

【摘要】：以互聯(lián)網(wǎng)為代表的IP網(wǎng)絡(luò)在人類(lèi)社會(huì)生活中扮演著越來(lái)越重要的地位。互聯(lián)網(wǎng)技術(shù)的迅猛發(fā)展,網(wǎng)絡(luò)規(guī)模的不斷擴(kuò)大,同時(shí)網(wǎng)絡(luò)異構(gòu)化程度的不斷增加,使得當(dāng)今的網(wǎng)絡(luò)環(huán)境日益復(fù)雜。網(wǎng)絡(luò)時(shí)延對(duì)于網(wǎng)絡(luò)故障排除、流量監(jiān)控、網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)設(shè)計(jì)等許多方面具有重大作用,因此IP網(wǎng)絡(luò)時(shí)延的測(cè)量、估計(jì)和分析研究具有重要的意義。 本文首先針對(duì)鏈路時(shí)延估計(jì)PLE算法計(jì)算復(fù)雜度較高的問(wèn)題,通過(guò)采用可變步長(zhǎng)離散化時(shí)延模型,減少了網(wǎng)絡(luò)時(shí)延的量化問(wèn)隔,從而降低了鏈路時(shí)延估計(jì)PLE算法的計(jì)算復(fù)雜度,并在NS-2仿真實(shí)驗(yàn)的基礎(chǔ)上,驗(yàn)證了改進(jìn)后算法的準(zhǔn)確性和高效性；其次介紹了分布式網(wǎng)絡(luò)質(zhì)量監(jiān)測(cè)與路由優(yōu)化系統(tǒng)的子系統(tǒng)即分布式網(wǎng)絡(luò)質(zhì)量監(jiān)測(cè)系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn),網(wǎng)絡(luò)質(zhì)量監(jiān)測(cè)系統(tǒng)是大量網(wǎng)絡(luò)時(shí)延數(shù)據(jù)的來(lái)源和基礎(chǔ),并且測(cè)量得到的時(shí)延數(shù)據(jù)也用于路由優(yōu)化系統(tǒng)的分析和計(jì)算,從而完成網(wǎng)絡(luò)質(zhì)量監(jiān)測(cè)和優(yōu)化的功能；最后通過(guò)對(duì)IP網(wǎng)絡(luò)大范圍測(cè)量得到的網(wǎng)絡(luò)時(shí)延數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析和建模,指出時(shí)延分布近似符合威布爾模型曲線,發(fā)現(xiàn)了時(shí)延分布的一般規(guī)律,并用matlab仿真軟件對(duì)往返時(shí)延數(shù)據(jù)進(jìn)行了擬合,從而驗(yàn)證了分布模型的合理性和有效性。 通過(guò)本文的研究,改進(jìn)的PLE算法降低了鏈路時(shí)延估計(jì)的計(jì)算復(fù)雜度,并且分布式網(wǎng)絡(luò)質(zhì)量監(jiān)測(cè)系統(tǒng)較好的實(shí)現(xiàn)了網(wǎng)絡(luò)時(shí)延測(cè)量的功能,因此可以廣泛運(yùn)用到未來(lái)的網(wǎng)絡(luò)時(shí)延測(cè)量和估計(jì)中。
[Abstract]:IP network, represented by the Internet, plays a more and more important role in human social life. With the rapid development of Internet technology, the expansion of network scale and the increasing degree of isomerization, the network environment is becoming more and more complex. Network delay plays an important role in many aspects such as network troubleshooting, traffic monitoring, network topology design and so on. Therefore, the measurement, estimation and analysis of IP network delay are of great significance. In order to solve the problem of high computational complexity of the link delay estimation (PLE) algorithm, this paper uses a variable step discretization delay model to reduce the quantization of the network delay, thus reducing the computational complexity of the link delay estimation PLE algorithm. Based on the simulation experiment of NS-2, the accuracy and efficiency of the improved algorithm are verified. Secondly, the design and implementation of the distributed network quality monitoring and routing optimization system, which is the subsystem of the distributed network quality monitoring system, is introduced. The network quality monitoring system is the source and foundation of a large number of network delay data, and the measured delay data are also used in the analysis and calculation of the routing optimization system, thus completing the function of network quality monitoring and optimization. Finally, through the statistical analysis and modeling of the network delay data measured in a wide range of IP networks, it is pointed out that the time delay distribution approximately accords with the Weibull model curve, and the general rule of the delay distribution is found. The round trip delay data are fitted with matlab simulation software, which verifies the rationality and validity of the distribution model. Through the research in this paper, the improved PLE algorithm reduces the computational complexity of link delay estimation, and the distributed network quality monitoring system achieves the function of network delay measurement. Therefore, it can be widely used in the future network delay measurement and estimation.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TP393.06

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本文編號(hào)：1822376