【正文】 ........................................................................... 8 AODV 路由協(xié)議概述 ........................................................................................... 8 AODV 路由算法原理 ........................................................................................... 9 AODV 術(shù)語 ........................................................................................................... 9 AODV 路由協(xié)議數(shù)據(jù)報(bào)格式 ............................................................................. 10 RREP 協(xié)議幀格式 ..................................................................................... 10 RERR 協(xié)議幀格式 ..................................................................................... 11 RREPACK ................................................................................................ 11 AODV 路由協(xié)議的操作 ..................................................................................... 12 維護(hù)序列號(hào) ............................................................................................... 12 路由表項(xiàng)和先驅(qū)表 ................................................................................... 13 幻產(chǎn)生路由請(qǐng)求 ....................................................................................... 13 路由請(qǐng)求消息的控制傳播 ....................................................................... 14 處理和轉(zhuǎn)發(fā)路由請(qǐng)求 ............................................................................... 14 產(chǎn)生路由應(yīng)答 ........................................................................................... 15 接收和轉(zhuǎn)發(fā)路由應(yīng)答 ............................................................................... 16 單向鏈路上的操作 ................................................................................... 17 Hello 消息 .................................................................................................. 17 維護(hù)本地連接性 ..................................................................................... 18 RERR 消息，路由過期和路由刪除 ....................................................... 18 本地修復(fù) ................................................................................................. 19 3 NS2 網(wǎng)絡(luò)仿真環(huán)境介紹及其實(shí)現(xiàn) ............................................................................... 21 NS2 簡介 ............................................................................................................. 21 NS2 的組成 ......................................................................................................... 22 軟件構(gòu)成 .................................................................................................... 22 NS2 現(xiàn)有的仿真元素 ............................................................................... 22 NS2 體系結(jié)構(gòu) ..................................................................................................... 23 Ad Hoc 網(wǎng)絡(luò)中 AODV 路由協(xié)議的研究與仿真 IV NS2 工作機(jī)制 ..................................................................................................... 25 OTcl 實(shí)現(xiàn)仿真的一般過程 ....................................................................... 26 C++建立新協(xié)議或修改已有仿真元素要考慮的問題 ............................. 26 NS2 中 Ad Hoc 網(wǎng)絡(luò)仿真原理 .......................................................................... 27 NS2 對(duì) Ad Hoc 網(wǎng)絡(luò)的仿真總體模塊結(jié)構(gòu) ............................................ 27 Ad Hoc 網(wǎng)絡(luò)節(jié)點(diǎn)的模塊結(jié)構(gòu) .................................................................. 28 Ad Hoc 網(wǎng)絡(luò)的仿真步 驟 .......................................................................... 29 4 AODV 路由協(xié)議仿真步驟 ........................................................................................... 31 AODV 路由協(xié)議仿真步驟 ................................................................................. 31 網(wǎng)絡(luò)仿真模 型及協(xié)議性能評(píng)估參數(shù) ................................................................. 31 網(wǎng)絡(luò)仿真模型 ............................................................................................ 31 協(xié)議性能評(píng)估參數(shù) .................................................................................... 32 仿真 分析 ............................................................................................................. 32 路由協(xié)議開銷 ............................................................................................ 32 分組投遞率 ............................................................................................... 33 平均端到端時(shí)延 ....................................................................................... 33 小結(jié) ..................................................................................................................... 34 5 AODV 路由協(xié)議改進(jìn) ................................................................................................... 35 AODV 協(xié)議改進(jìn) ................................................................................................. 35 本章小結(jié) ............................................................................................................. 37 結(jié) 論 ............................................................................................................................... 39 致 謝 ............................................................................................................................... 40 參考文獻(xiàn) ........................................................................................................................... 41 Ad Hoc 網(wǎng)絡(luò)中 AODV 路由協(xié)議的研究與仿真 1 1 緒 論 Ad Hoc 網(wǎng)絡(luò)概述 Ad Hoc 網(wǎng)絡(luò)產(chǎn)生原因 隨著信息技術(shù)的不斷發(fā)展，人們對(duì)移動(dòng)通信的需求越來越強(qiáng)。s research, discovered that the source node repair existence latency is very big in the route maintenance, but the local node repair existence will possibly affect the most superior route39。s thought and in the DSDV route agreement series number thought very good unifies in together, ca