【摘要】：隨著網(wǎng)絡(luò)技術(shù)的迅速發(fā)展，新型網(wǎng)絡(luò)業(yè)務(wù)不斷產(chǎn)生，網(wǎng)絡(luò)流量呈現(xiàn)多樣化、多變性的特點(diǎn)。人們生活質(zhì)量提高的同時，對網(wǎng)絡(luò)的要求也越來越高，帶寬、延遲、抖動和丟包率等這些衡量網(wǎng)絡(luò)服務(wù)質(zhì)量的因素變得越來越精細(xì)。另外，大量業(yè)務(wù)的使用容易使全分組網(wǎng)絡(luò)發(fā)生擁塞，且不同業(yè)務(wù)有不同的需求，所以對業(yè)務(wù)加以區(qū)分和控制，并為之提供優(yōu)先等級的區(qū)分服務(wù)顯得很有必要，以便解決網(wǎng)絡(luò)延遲和阻塞問題，確保網(wǎng)絡(luò)安全性。本文結(jié)合多核網(wǎng)絡(luò)處理器的硬件和軟件特征，設(shè)計和具體實(shí)現(xiàn)了可應(yīng)用于各種網(wǎng)絡(luò)設(shè)備的QoS模塊。 論文先分析了網(wǎng)絡(luò)的現(xiàn)狀和未來的發(fā)展趨勢，總結(jié)出QoS的必要性及其研究現(xiàn)狀，對IP QoS技術(shù)進(jìn)行了分析和對比，主要包括QoS體系結(jié)構(gòu)和實(shí)現(xiàn)機(jī)制兩大部分，對常用的分類標(biāo)記、流量控制和擁塞控制技術(shù)進(jìn)行了探討。論文接著闡述了網(wǎng)絡(luò)包分類算法的地位和應(yīng)用場景，研究了幾種經(jīng)典的包分類算法的原理、分類過程、優(yōu)缺點(diǎn)及其改進(jìn)，分析對比這些算法后，選擇分類速度較快的RFC算法對本系統(tǒng)的網(wǎng)包進(jìn)行分類。 其次，論文對OCTEON Plus CN5860多核網(wǎng)絡(luò)處理器硬件和軟件架構(gòu)進(jìn)行了分析，重點(diǎn)討論了硬件對QoS的支持、包處理流程、軟件平臺中的QoS、Linux與簡單執(zhí)行環(huán)境（Simple Executive, SE）的通信機(jī)制以及SE的工作流程。在此基礎(chǔ)上，設(shè)計和實(shí)現(xiàn)了兩種QoS，一種是DiffServ體系的通用型QoS，實(shí)現(xiàn)了優(yōu)先級映射、分類、標(biāo)記和流量監(jiān)管等基本功能，另一種是移植Linux TC中HTB模塊到多核SE環(huán)境下，具有鏈路共享、層次共享等更多功能的增強(qiáng)型QoS，這是本文的重點(diǎn)和難點(diǎn)部分。 最后，搭建了實(shí)驗(yàn)平臺，對系統(tǒng)進(jìn)行功能驗(yàn)證，，主要針對流量控制、報文分類等功能，結(jié)果表明，兩種QoS都達(dá)到了預(yù)期的效果。
[Abstract]:With the rapid development of network technology, new network services continue to emerge, network traffic presents the characteristics of diversification and variability. With the improvement of people's quality of life, the requirements for network are getting higher and higher, and the factors that measure the quality of network service, such as bandwidth, delay, jitter and packet loss rate, become more and more fine. In addition, the use of a large number of services is easy to make the whole packet network congestion, and different services have different requirements, so it is necessary to distinguish and control the traffic and provide priority differentiated services in order to solve the network delay and congestion problems and ensure network security. Based on the hardware and software characteristics of multi-core network processor, a QoS module which can be used in various network devices is designed and implemented in this paper. This paper first analyzes the present situation and future development trend of the network, summarizes the necessity of QoS and its research status, analyzes and compares the IP QoS technology, including QoS architecture and implementation mechanism, and discusses the commonly used classification marking, flow control and congestion control technologies. The paper then expounds the status and application scene of the network packet classification algorithm, studies the principle, classification process, advantages and disadvantages and improvements of several classical packet classification algorithms, analyzes and compares these algorithms, and selects the RFC algorithm with faster classification speed to classify the network packets of the system. Secondly, the hardware and software architecture of OCTEON Plus CN5860 multi-core network processor is analyzed, and the hardware support for QoS, packet processing flow, communication mechanism between QoS,Linux and simple execution environment (Simple Executive, SE) in software platform and SE workflow are discussed in detail. On this basis, two kinds of QoS, are designed and implemented, one is the universal QoS, of DiffServ system, which realizes the basic functions of priority mapping, classification, marking and traffic supervision, the other is to migrate the HTB module from Linux TC to multi-core SE environment, which has more functions such as link sharing, hierarchical sharing and so on, which is the key and difficult part of this paper. Finally, the experimental platform is built to verify the function of the system, mainly for flow control, message classification and other functions. The results show that the two kinds of QoS have achieved the desired results.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP332;TP393.06

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