【摘要】：Internet作為一個新興的領域,近年來在用戶數量、網絡規(guī)模、應用功能等方面均得到了前所未有的高速發(fā)展。電子商務、SNS、云計算、物聯(lián)網、微博等無一不在逐步的改變著我們的生活。當今的網絡運行狀況卻日益復雜,但是用戶對服務質量的需要確越來越高,所以對于網絡內部運行情況的研究就顯得十分重要。作為確定互聯(lián)網運行狀況的重要手段之一——網絡測量一直是互聯(lián)網研究的熱點。時延測量是網絡測量的重要部分。通過時延測量可以了解網絡的運行情況,從而及時地采取擁塞控制、鏈路選擇、QOS優(yōu)化等措施,提高網絡服務質量。 本文主要研究了端到端網絡的時延測量方法,提出了一種新的針對特定流量的測量方案。論文首先介紹了網絡測量的關鍵技術及其實現(xiàn)背景,闡述了網絡性能的測量指標及測量方法,說明了Linux系統(tǒng)下終端圖形界面測試平臺的開發(fā)過程；然后分析了linux系統(tǒng)底層協(xié)議棧的工作原理及令牌桶算法實現(xiàn)流量控制的過程,并且具體研究了測試平臺與發(fā)包協(xié)議棧的交互的結構體系；之后構建了時延測量平臺,在該平臺之上通過模擬發(fā)包,得到特定流量下的網絡時延,其特點是它不依賴于載體,不區(qū)分網絡模型；最后對測試數據進行了分析,并且提出時延測量方法的不足之處及對后續(xù)開發(fā)工作的建議。
[Abstract]:As a new field, Internet has been developing at an unprecedented speed in recent years in terms of user number, network size, application function and so on. E-commerce, SNS, cloud computing, Internet of things, Weibo and so on are gradually changing our lives. Nowadays, the network operation is becoming more and more complicated, but the users need more and more high quality of service, so it is very important to study the internal operation of the network. As one of the important means to determine the operation of the Internet, network measurement has been a hot topic in Internet research. Time delay measurement is an important part of network measurement. Through the measurement of delay, we can know the operation of the network, and then take some measures such as congestion control, link selection, QOS optimization and so on, so as to improve the quality of service of the network. In this paper, the end-to-end network delay measurement method is studied, and a new measurement scheme for specific traffic is proposed. Firstly, the paper introduces the key technology of network measurement and its implementation background, expounds the measurement index and method of network performance, and explains the development process of terminal graphical interface test platform under Linux system. Then it analyzes the working principle of the bottom protocol stack of linux system and the process of the token bucket algorithm to realize the flow control, and studies the structure system of the interaction between the test platform and the package sending protocol stack. After that, the delay measurement platform is constructed, and the network delay under specific traffic is obtained by simulating the delivery of contracts on the platform. The characteristic of the platform is that it does not depend on the carrier and does not distinguish the network model. Finally, the test data are analyzed, and the shortcomings of time delay measurement method and suggestions for further development are put forward.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.06

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