【正文】 k architectures in existing systems included contents are CORVUS system introduced in America， Wireless Regional Area Network (WRAN) based on IEEE as well as the wireless Mesh work supporting multichannel and multiinterface； related work protocols are of CORVUS system， the XG system for military applications， and WRAN.A cooperative spectrum sensing method of small scale cognitive wireless work is proposed. On this basis， a munication protocol of small scale cognitive wireless work is designed. Starting from the program plexity， this paper analyzes and evaluates the munication protocol. Compared with other typical protocols， the performance of this protocol is improved by using the mechanism of centralized control， distributed sensing and point to point munication. The stability and plexity of the system are taken into account.Keywords： cognitive radio； work architecture； work protocol；cognitive wireless work； collaborative awareness； munication protocol； program plexity 目 錄摘 要 .............................................................................................................................IAbstract..........................................................................................................................II第 1 章 緒論 ..................................................................................................................1 認知無線電的產(chǎn)生背景和特征 ..........................................................................1 CR 技術(shù)的產(chǎn)生 ...........................................................................................2 CR 特征 .........................................................................................................2 認知無線電與軟件無線電之間的關(guān)系 .......................................................3 CR 當前的發(fā)展與標準 ..................................................................................3 認知無線網(wǎng)絡(luò)的研究背景 ...................................................................................4第 2 章 認知無線網(wǎng)絡(luò)的簡介 ......................................................................................5 認知無線網(wǎng)絡(luò)的概念 ..........................................................................................5 認知無線網(wǎng)絡(luò)的特點 ..........................................................................................5 認知階段 .......................................................................................................6 學(xué)習(xí)階段 .......................................................................................................6 決策和調(diào)整階段 ...........................................................................................6第 3 章 認知無線網(wǎng)絡(luò)的體系結(jié)構(gòu) ............................................................................8 目前提出的具有代表性的認知無線網(wǎng)絡(luò)(CRN) 體系結(jié)構(gòu) ...............................8 網(wǎng)絡(luò)架構(gòu) ...............................................................................................................8 CORVUS 系統(tǒng) ...............................................................................................9 無線區(qū)域網(wǎng) ...................................................................................................9 支持多信道多接口的無線 Mesh 網(wǎng)絡(luò) ........................................................9 協(xié)議體系 ............................................................................................................10 CORVUS 的協(xié)議體系 .................................................................................10 XG 項目的協(xié)議體系 ...................................................................................11 WRAN 的協(xié)議體系 .....................................................................................13 CRN 網(wǎng)絡(luò)動態(tài)接入 ............................................................................................15 CRN 中 PHY 層中的關(guān)鍵技術(shù) ...................................................................16 CRN 中 MAC 層中的關(guān)鍵技術(shù) ..................................................................17第 4 章 小型認知無線網(wǎng)絡(luò)的關(guān)鍵技術(shù) ....................................................................18 引言 .....................................................................................................................18 認知無線網(wǎng)絡(luò)的頻譜感知 .................................................................................18 頻譜感知的功能和特點 ..............................................................................18 常用頻譜感知方法 ......................................................................................19 認知無線網(wǎng)絡(luò)的頻譜分配 .................................................................................20 基于網(wǎng)絡(luò)結(jié)構(gòu)的頻譜分配 ..........................................................................20III / 39 基于合作方式的頻譜分配 ..........................................................................21 基于接入方式的分類 ..................................................................................21 短距離無線網(wǎng)絡(luò)的特點和實例 ........................................................................22 短距離無線網(wǎng)絡(luò)的特點 ..............................................................................22 典型的短距離通信網(wǎng)絡(luò) ..............................................................................22 小型認知無線網(wǎng)絡(luò)的特點和研究重點 .............................................................22 小型認知無線網(wǎng)絡(luò)的特點 ..........................................................................23 小型認知無線網(wǎng)絡(luò)設(shè)計的研究重點 ..........................................................23第 5 章 小型認知無線網(wǎng)絡(luò)通信協(xié)議的設(shè)定 ............................................................24 認知無線網(wǎng)絡(luò)的環(huán)境感知方法 ........................................................................24 基于單節(jié)點的頻譜檢測方法 .....................................................................24 協(xié)同感知方法 .............................................................................................24 認知無線網(wǎng)絡(luò)的通信協(xié)議設(shè)計 ........................................................................25 協(xié)議層次架構(gòu) .............................................................................................25 控制節(jié)點的工作時序 ...............................................................