【正文】 廣西大學(xué)學(xué)士學(xué)位論文 基于 OPNET的校園網(wǎng)仿真 I 畢業(yè)設(shè)計(jì)（論文） 題目 基于 OPNET的校園網(wǎng)仿真 學(xué) 院 計(jì)算機(jī)與電子信息學(xué) 專 業(yè) 通信工程 學(xué) 號(hào) 姓 名 指導(dǎo)教師 二○一二 年 六 月 廣西大學(xué)學(xué)士學(xué)位論文 基于 OPNET的校園網(wǎng)仿真 II 摘 要 近年來(lái)，隨著計(jì)算機(jī)科學(xué)技術(shù)的發(fā)展，特別是網(wǎng)絡(luò)技術(shù)的發(fā)展，高校規(guī)模的擴(kuò)大和人數(shù)的增多，高校對(duì)網(wǎng)絡(luò)的需求也越來(lái)越大，對(duì)上網(wǎng)速度的要求也越來(lái)越高，對(duì)業(yè)務(wù)的需求也迅速增長(zhǎng)?，F(xiàn)代化教學(xué)手段的普遍運(yùn)用也使多媒體業(yè) 務(wù)需求迅速增長(zhǎng)，需要入網(wǎng)的結(jié)點(diǎn)也迅速增加，因此校園網(wǎng)網(wǎng)絡(luò)的結(jié)構(gòu)更加復(fù)雜，對(duì)設(shè)備性能的要求也更高，鏈路速度更快。許多早期建成的校園網(wǎng)已經(jīng)不能滿足現(xiàn)在的需求，校園網(wǎng)需要重新規(guī)劃設(shè)計(jì)。而建設(shè)一個(gè)基于多業(yè)務(wù)、復(fù)雜的校園網(wǎng)絡(luò)系統(tǒng)，其投資規(guī)模是非常龐大的，需要一種有效的手段對(duì)校園網(wǎng)進(jìn)行規(guī)劃、設(shè)計(jì)、并實(shí)現(xiàn)。通過(guò)數(shù)學(xué)建模的方法過(guò)于復(fù)雜，根據(jù)經(jīng)驗(yàn)進(jìn)行規(guī)劃設(shè)計(jì)的方法不可靠，不適應(yīng)日益增長(zhǎng)的網(wǎng)絡(luò)需求，利用網(wǎng)絡(luò)仿真軟件來(lái)對(duì)網(wǎng)絡(luò)模型進(jìn)行建模并仿真便成了必然的選擇。 本文的主要研究任務(wù)，是通過(guò) OPNET仿真軟件，對(duì)我國(guó)一般大學(xué)校園網(wǎng)的 網(wǎng)絡(luò)結(jié)構(gòu)進(jìn)行建模，對(duì)關(guān)鍵參數(shù)進(jìn)行收集，分析，并在原有模型上添加網(wǎng)絡(luò)結(jié)點(diǎn)及應(yīng)用，再進(jìn)行仿真，分析，對(duì)比，找出可能影響校園網(wǎng)性能的主要因素。 本文的研究對(duì)校園網(wǎng)的規(guī)劃、設(shè)計(jì)、網(wǎng)絡(luò)建模都具有一定的指導(dǎo)意義，可以提高網(wǎng)絡(luò)設(shè)計(jì)的科學(xué)性，縮短網(wǎng)絡(luò)設(shè)計(jì)周期，降低校園網(wǎng)網(wǎng)絡(luò)的投資風(fēng)險(xiǎn)。具有一定的應(yīng)用價(jià)值。 關(guān)鍵詞： 網(wǎng)絡(luò)仿真 OPNET 校園網(wǎng) 廣西大學(xué)學(xué)士學(xué)位論文 基于 OPNET的校園網(wǎng)仿真 III Abstract In recent years, with the development of puter science and technology, especially the development of work technology, the expansion of the scale of colleges and the increasing of the number, the work demand being more and more big, the Inter needing higher speed,demands on the business also need grow modern teaching means universal use also make multimedia business demand growth, and the node of the is also rapidly increase, so the campus work structure bees more plex,the requirements of equipment performance requirements bees higher ,link speed bees of the earlier campus work has can39。t meet the demand now, campus work needs to be planed and designed again. building of a multiservicebased and plex campus work system， its scale of investment is very large， needing for an effective means of pairs of campus work planning,design,and mathematical modeling approach is too plicated, through experience,the planning and designing method is not reliable and not suited to the growing work needs, using work simulation software to model the work model and simulation has bee an inevitable choice. The main task of this research is through OPNET simulation software , for China39。s general university work, the work structure for modeling, simulation of work behavior, the key parameters of the collection, analysis, and add in the original model of the work nodes and applications, and then simulation, analysis， parison, Find out the main factors that may affect the campus work performance. This study on the campus work planning, design, work modeling has certain guiding significance for work design can improve the scientific nature of the work places a short design cycle, reduce the investment risks of Campus Network. Having certain application value. Key words： OPNET； work simulation； campus work 廣西大學(xué)學(xué)士學(xué)位論文 基于 OPNET的校園網(wǎng)仿真 IV 目 錄 第一章 緒論 .................................................................................................. 1 ........................................................... 1 ................................................................... 2 ............................................................... 3 第二章 仿真軟件 OPNET ............................................................................. 4 OPNET仿真平臺(tái)簡(jiǎn)介 .............................................................. 4 OPNET仿真關(guān)鍵技術(shù) ............................................................. 5 三層建模機(jī)制 .............................................................. 5 離散事件仿真機(jī)制 ...................................................... 7 仿真調(diào)度機(jī)制 .............................................................. 7 OPNET仿真流程 ..................................................................... 8 第三章 校園網(wǎng)性能評(píng)價(jià)指標(biāo) ...................................................................... 9 校園網(wǎng)的性能評(píng)價(jià)指標(biāo) ......................................................... 9 響應(yīng)時(shí)間 ...................................................................... 9 網(wǎng)絡(luò)延遲 ...................................................................... 9 延遲變化 .................................................................... 10 吞吐量 ........................................................................ 10 鏈路使用率 .................................................................11 資源利用率 .................................................................11 丟包率 .........................................................................11 可靠性和可用性 .........................................................11 素 ................................................................. 12 第四章 校園網(wǎng)的網(wǎng)絡(luò)設(shè)計(jì) ........................................................................ 13 校園網(wǎng)的主要拓?fù)漕愋? ..................................................... 13 星型拓?fù)浣Y(jié)構(gòu) ............................................................ 13 樹型拓?fù)浣Y(jié)構(gòu) ............................................................ 13 總線拓?fù)浣Y(jié)構(gòu) ............................................................ 13 環(huán)型拓?fù)浣Y(jié)構(gòu) ............................................................ 14 廣西大學(xué)學(xué)士學(xué)位論文 基于 OPNET的校園網(wǎng)仿真 V 網(wǎng)狀型拓?fù)浣Y(jié)構(gòu) ........................................................ 14 校園網(wǎng)關(guān)鍵設(shè)備及主要技術(shù) ............................................. 14 ...................................................................... 14 主要技術(shù) .................................................................. 17 第五章 校園網(wǎng)建模及仿真分 析 ................................................................ 19 校園網(wǎng)的建模 ..................................................................... 19 需求分析 .................................................................... 19 網(wǎng)絡(luò)建模 ........................................................