本文關(guān)鍵詞： 超短波自組織網(wǎng)絡(luò) MIL-STD-188-220C 控制幀 退避算法　出處：《電子科技大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：現(xiàn)今社會(huì)隨著無(wú)固定設(shè)施網(wǎng)絡(luò)條件下人們對(duì)于網(wǎng)絡(luò)通信的需求逐漸增加,對(duì)這種能夠隨時(shí)組網(wǎng)的自組織網(wǎng)絡(luò)系統(tǒng)進(jìn)行更加深入的開(kāi)發(fā)。自組織網(wǎng)絡(luò)系統(tǒng)和終端基于摒棄了固定設(shè)施的有線(xiàn)網(wǎng)絡(luò)模式,對(duì)其進(jìn)行了開(kāi)發(fā)和創(chuàng)新,并且自組織網(wǎng)絡(luò)為通信網(wǎng)絡(luò)系統(tǒng)的抗干擾終端做出了巨大貢獻(xiàn)。它已經(jīng)完全取代了傳統(tǒng)網(wǎng)絡(luò)設(shè)施,作為新時(shí)代的通信計(jì)算機(jī)網(wǎng)絡(luò)通信系統(tǒng)建設(shè)的基礎(chǔ)性研究。自組織無(wú)線(xiàn)網(wǎng)絡(luò)通信系統(tǒng)因?yàn)槠鋬?yōu)秀的自組織、網(wǎng)絡(luò)自我修復(fù)功能及其抗毀壞能力在國(guó)防領(lǐng)域有著非比尋常的重要研究?jī)r(jià)值�，F(xiàn)代抗干擾上能夠隨處看到自組織無(wú)線(xiàn)網(wǎng)絡(luò)的身影,同時(shí)結(jié)合超短波優(yōu)秀的傳輸能力,超短波自組織網(wǎng)絡(luò)已經(jīng)被各個(gè)國(guó)家的國(guó)防科研所采納。本文所要研究的超短波自組織無(wú)線(xiàn)網(wǎng)絡(luò),無(wú)論在民用還是國(guó)防領(lǐng)域均發(fā)揮著巨大的作用,對(duì)該網(wǎng)絡(luò)的網(wǎng)絡(luò)協(xié)議特點(diǎn)我們將會(huì)在文章中進(jìn)行深入的分析。本文從無(wú)線(xiàn)網(wǎng)絡(luò)的起源開(kāi)始,介紹了無(wú)線(xiàn)網(wǎng)絡(luò)的發(fā)展情況和應(yīng)用背景,同時(shí)介紹了超短波自組織網(wǎng)絡(luò)在各個(gè)領(lǐng)域的應(yīng)用情況。然后簡(jiǎn)單敘述了超短波自組織網(wǎng)絡(luò)的相關(guān)特點(diǎn),例如:自動(dòng)組網(wǎng)功能、動(dòng)態(tài)型拓?fù)洹⒕W(wǎng)絡(luò)獨(dú)有的組網(wǎng)結(jié)構(gòu)等等。接下來(lái)分析了該網(wǎng)絡(luò)中網(wǎng)絡(luò)通信協(xié)議方面的問(wèn)題,對(duì)MAC(媒體接入控制技術(shù))層的幾種常用協(xié)議做出了介紹,選擇了一種常用的協(xié)議對(duì)其控制幀進(jìn)行了解析,并通過(guò)實(shí)際數(shù)據(jù)包測(cè)試,驗(yàn)證了解析方案。接下來(lái)我們對(duì)美國(guó)通信網(wǎng)絡(luò)所采用的220C協(xié)議的MAC層進(jìn)行了研究,對(duì)其MAC層的幀類(lèi)型、格式、各個(gè)信道訪(fǎng)問(wèn)過(guò)程及避免沖突的退避算法進(jìn)行了詳細(xì)的分析。并對(duì)MAC層的數(shù)據(jù)幀提出了解析方案,通過(guò)對(duì)220C數(shù)據(jù)包的解析對(duì)解析方案進(jìn)行了驗(yàn)證。通過(guò)OPNET仿真平臺(tái)建立了包括Aloha、CSMA、220C的RNAD和DNAD算法在內(nèi)的四種MAC訪(fǎng)問(wèn)退避機(jī)制。分析了仿真結(jié)果和各個(gè)退避算法的優(yōu)缺點(diǎn)。并提出了一種改進(jìn)的220C的RNAD算法。通過(guò)仿真,驗(yàn)證該改進(jìn)后算法對(duì)網(wǎng)絡(luò)性能的提升。為后續(xù)的研究提供了一定的參考。
[Abstract]:Nowadays, with the increasing demand for network communication in the absence of fixed network, This kind of ad hoc network system, which can organize network at any time, has been further developed. The ad hoc network system and terminal have been developed and innovated based on the wired network mode of fixed facilities. And the self-organizing network has made a great contribution to the anti-jamming terminal of the communication network system. It has completely replaced the traditional network facilities. As the basic research of the construction of communication computer network communication system in the new era, the self-organizing wireless network communication system is due to its excellent self-organization. The self-repairing function of the network and its ability to resist damage are of great importance in the field of national defense. In modern anti-jamming, the self-organized wireless network can be seen everywhere, and combined with the excellent transmission capability of ultrashort wave. Ultrashort wave ad hoc networks have been adopted by national defense research institutes in various countries. The ultra-short wave ad hoc wireless networks studied in this paper play a great role in both civil and national defense fields. We will deeply analyze the characteristics of the network protocol in this paper. This paper begins with the origin of wireless network and introduces the development and application background of wireless network. At the same time, the application of ultrashort wave ad hoc network in various fields is introduced, and then the related features of ultrashort wave ad hoc network are briefly described, such as automatic networking function, dynamic topology, etc. The unique network structure and so on. Next, the paper analyzes the problems of network communication protocols in the network, and introduces several common protocols in the MAC (Media access Control Technology) layer. This paper selects a common protocol to parse the control frame, and verifies the resolution scheme by testing the actual data packet. Then, we study the MAC layer of 220C protocol used in American communication network, and the frame type of its MAC layer. Format, channel access process and collision avoidance algorithm are analyzed in detail, and the resolution scheme of data frames in MAC layer is proposed. The parse of 220C data packet is verified. Four kinds of MAC access Backoff mechanisms, including RNAD and DNAD algorithms of Aloha-CSMA-220C, are established on the OPNET simulation platform. The simulation results and the advantages and disadvantages of each Backoff algorithm are analyzed. An improved 220C RNAD algorithm is proposed. The improved algorithm is proved to improve the network performance and provide a reference for further research.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN925

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