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    題名: 分析和研製以Linux作業系統為基礎之IEEE 802.16 WiMAX系統架構和軟體模擬實體層
    其他題名: Analysis and implementation of IEEE 802.16 WiMAX system architecture on Linux operating system and software physical layer
    作者: 黃啟豪;Huang, Chi-hao
    貢獻者: 淡江大學電機工程學系碩士班
    許獻聰;Sheu, Shiann-tsong
    關鍵詞: IEEE 802.16;WiMAX;無線網路;Linux;IEEE 802.16 WiMAX;Linux Operating System;Linux Device Driver
    日期: 2005
    上傳時間: 2010-01-11 07:16:37 (UTC+8)
    摘要: 在行動電信業者投注鉅資以建置第三代(3G)行動通訊網路之際,電腦工業卻推出了另一種無線寬頻之技術:「WiMax」(Worldwide Interoperability for Microwave Access)技術,別稱IEEE 802.16 通訊技術。這是一種強大的無線通訊技術以提供使用者能快速且自由的進行無線資料通訊服務,而此技術亦可望成為未來家庭寬頻上網的「最後一哩」(Last Mile)之解決方案。以替代數位用戶迴路(DSL)技術的802.16a 為例,其理論傳輸距離約為50 公里且傳輸速率約為75Mbps;而針對行動裝置的802.16e 為例,其理論傳輸距離約在2-5 公里且傳輸速率約為15Mbps。由於無線網路的基礎建設架設成本比有線為低,故WiMAX 可被視為DSL 及纜線等有線寬頻的便宜替代方案。另一方面,雖然3G 行動通訊網路的資料傳輸速率比目前的行動電話網路為快,但卻比WiMax 網路慢了30 倍且其無線電的涵蓋面積亦比WiMax 小約10倍。因此,建置WiMax 網路業者所需之基地台數目亦比較少,而且在WiMax技術中部分頻帶還可以免費使用。
    目前全球67 家WiMAX 論壇之會員公司都正以WiMax 的名稱在推動這項標準。半導體巨人英特爾公司正大力支持,而芬蘭行動電話及網路供應商諾基亞公司(Nokia)也支持這種技術標準。英特爾開始把WiMax 技術納入英特爾的晶片平台中,並預計在今年下半年開始推出WiMax 晶片。MIC 分析師預估,至2008 年將有25%的筆記型電腦內建這種無線網路技術。而Nemcek 相信,在三、四年之內消費者即可享受WiMax 所帶來之便利,到2007年或2008 年,WiMax 市場可望起飛。
    本論文「分析和研製以Linux 作業系統為基礎之IEEE 802.16 WiMAX系統架構」為實現WiMax 無線寬頻網路在Linux 上所進行之分析與研製。系統分析方面,先針對802.16 系列之協定規格作了初步的研讀,然後去規劃符合Linux 作業系統的系統架構。系統研製方面,先利用PC 進行系統架構之開發,之後以利WiMAX 在Linux 作業系統上驅動程式的撰寫。此系統規劃也會一併考慮更有效率之方式進行程式移植與開發之工作。此外在Linux 上開發的媒體存取控制通訊協定,並無法拿到真正的實體層實際去做。所以提出使用以乙太網路為實體層在x86 電腦上面做測試。但是因為乙太網路不能真正的模擬出無線網路實體層之特性,所以在此提出研製SoftPHY 作為模擬出無線網路實體層之特性。
    During the system providers of mobile communication investing much money to deploy 3G mobile communication networks, computer industry proposes another wireless communication technology: WiMAX (Worldwide Interoperability for Microwave Access) technique, which is also called as IEEE 802.16 communication technology. It is a strong wireless communication technology to provide users being able to quickly and arbitrarily use wireless data communication services, and this technique also has the potential to be a last mile solution of broadband home network connecting to Internet in future. In the example of 802.16a using instead of DSL technique, the theoretical value of transmission range is about 50km and the transmission rate can be up to 75Mbps. In the example of 802.16e using for mobile equipments, the theoretical value of transmission range is about 2-5km and the transmission rate can be up to 15Mbps. Owing to the cost of wireless network infrastructure is lower than that of wire network infrastructure, WiMAX can be regarded as a cheap substitutive scheme of DSL and other broadband wire networks. On the other hand, although the data transmission rate of 3G mobile communication network is faster than the currently mobile telecom network, it is still slower 30 times than that of WiMAX network, and its radio range is also smaller 10 times than that of WiMAX. Therefore, the required number of base station of WiMAX network is fewer than that of 3G mobile communication network, moreover, some parts of frequency bands defined in WiMAX are license-exempt.
    Present there are 67 member companies of WiMAX Forum in the world using the name of WiMAX to push the standard. The semiconductor giant-Intel corp. fully supports the technique, and the mobile phone and network provider-Nokia
    corp. also supports this technique standard. Intel corp. begins to include WiMAX technique in its chip platform, and plans to sell the WiMAX chip in the next half year. The analysts of MIC predict that there will be 25% notebooks installed this sort of wireless technique till 2008. Nemcek believes that consumers will get the convenience brought from WiMAX in 3 or 4 years, and the market of WiMAX will grow in 2007 or 2008.
    In this thesis” Analysis and Implementation of IEEE 802.16 WiMAX System Software Architecture on Linux Operating System” is to analyze and implement WiMAX wireless system on Linux operating system. For system analyzing, study the standard speciation of IEEE 802.16 series at first, then start to design software architecture for Linux system. For system implementation, use standard PC for software implementation, and then for others to follow the system architecture to implement Linux Device Driver for WiMAX. The system architecture will also consider the efficiency of porting and development of the embedded system. Also implement Software Emulate Physical Layer to verity the Linux Device Driver for
    WiMAX.
    顯示於類別:[電機工程學系暨研究所] 學位論文

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