【摘要】：在衡量IP網絡的性能指標中，，丟包率(packet loss rate)是三種基準指標(丟包率，時延，吞吐量)之一。它是評價一個主機在網絡整體中性能的必要測量項，其測量結果也是衡量網絡所能提供的網絡服務質量的重要參考依據(jù)。通過網絡丟包率測量的結果，在掌握當前網絡拓撲情況的前提下，也能為優(yōu)化網絡環(huán)境提供必要方法。因此，通過網絡丟包率的測量對問題進行故障定位的研究有較高使用價值。 本論文就丟包率測量系統(tǒng)的實現(xiàn)方法進行了具體研究，并提出了一種基于貝葉斯優(yōu)化算法來探測影響網絡的問題點。論文首先對網絡丟包率測量的相關理論與技術基礎進行了總結和分析，為系統(tǒng)的實現(xiàn)打下了基礎。然后對丟包率測量系統(tǒng)的通信協(xié)議進行了設計，使得測量系統(tǒng)的服務器和客戶端能夠交互通信信息。接著，對系統(tǒng)的實現(xiàn)方案進行了設計，包括服務器與客戶端的通信連接實現(xiàn)，以及客戶端與客戶端之間的通信連接實現(xiàn)。并且通過丟包率測量結果給出了一個高效的故障探測算法。最后，對論文所實現(xiàn)的丟包率測量系統(tǒng)的運行模式進行了介紹，構造了多個不同參數(shù)情況下的測試樣例對所實現(xiàn)的系統(tǒng)進行了測試與測量實驗，并對實驗結果進行了總結和分析。 論文完成了一個相對完整的網絡丟包率測量系統(tǒng)，實驗結果證明了所完成系統(tǒng)的功能正確性、有效性和健壯性，達到了論文所預設的工作目標。
[Abstract]:Among the performance indexes of IP networks, packet loss rate (packet loss rate) is one of the three benchmarks (packet loss rate, delay, throughput). It is a necessary measure to evaluate the performance of a host in the whole network, and the measurement result is also an important reference for evaluating the quality of network service provided by the network. Based on the results of the measurement of network packet loss rate, under the premise of mastering the current network topology, it can also provide a necessary method for optimizing the network environment. Therefore, the study of fault location through the measurement of network packet loss rate is of high practical value. In this paper, the implementation method of packet loss rate measurement system is studied in detail, and a Bayesian optimization algorithm is proposed to detect the problem points that affect the network. Firstly, the paper summarizes and analyzes the relevant theory and technical basis of network packet loss rate measurement, which lays a foundation for the realization of the system. Then, the communication protocol of the packet loss rate measurement system is designed, which makes the server and client of the measurement system can communicate with each other. Then, the implementation scheme of the system is designed, including the realization of the communication connection between the server and the client, and the realization of the communication connection between the client and the client. Furthermore, an efficient fault detection algorithm is presented by measuring the packet loss rate. Finally, the paper introduces the operation mode of the packet loss rate measurement system, and constructs several test samples with different parameters to test and measure the system. The experimental results are summarized and analyzed. A relatively complete network packet loss rate measurement system is completed in this paper. The experimental results show that the system is correct, effective and robust.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.06

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