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研究生:柯旭峰
研究生(外文):Hsu-Feng Ko
論文名稱:在多頻無線網狀網路下的一個具干擾感知之頻道配置策略
論文名稱(外文):An Interference-Aware Channel Assignment Strategyin Multi-Radio Wireless Mesh NetworksAn Interference-Aware Channel Assignment Strategyin Multi-Radio Wireless Mesh NetworksAn Interference-Aware Channel Assignment Strategy in Multi-Radio Wireless Mesh
指導教授:黃文祥黃文祥引用關係
指導教授(外文):Wen-Shyang Hwang
學位類別:碩士
校院名稱:國立高雄應用科技大學
系所名稱:資訊工程系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:55
中文關鍵詞:無線網狀網路多頻頻道配置
外文關鍵詞:wireless mesh networksmulti-radiochannel assignment
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隨著網路通訊科技的發展,人類生活已進入U台灣世代。在無線技術中由隨意架構(Ad Hoc)模式所延伸出的無線網狀網路(Wireless Mesh Networks),可以快速地建置網路及減少佈建成本,成為現今重要技術之一。無線網路需求越來越多,但在資源有限的無線頻譜中,相同頻率之間與頻率有重疊的頻道(Overlapping channel)之間都存有干擾(Interference);當無線設備在干擾嚴重的環境下,容易受干擾而遺失封包,在頻譜上,頻率不重疊的頻道更顯得稀少而顯得珍貴,因此若能在多頻無線網狀網路上提供有效的頻道配置,則能更有效地利用頻道。本研究在多頻無線網狀網路上提出一個具有干擾感知的頻道配置策略(Interference- aware Channel Assignment Strategy; ICAS),由集中式伺服器分析網路流量樣本(Traffic pattern)及干擾,利用無線干擾程度與封包成功傳達率(Packet delivery ratio)關係來配置對網路系統同頻影響(Co-channel impact)最小的頻道。ICAS能讓負載較重的通訊介面在干擾較小的頻道傳遞封包,並經由模擬軟體ns-2證明其網路效能提升。
Next-generation wireless communication technologies will make life more convenient. The wireless mesh networks evolved into a key technology in wireless communication development. The wireless mesh networks can quickly increase the coverage of wireless service. While single radio mesh nodes operating on single channel suffer from interference. Because more and more demand for wireless networks, wireless interference is becoming more and more serious. Interference of overlapping channel maybe leads to packet loss. Multi-radio mesh node using non-overlapping channel can significantly alleviate the interference problem and increase the aggregate bandwidth available to the network, but spectrum is scarce that interference impact remains in multi-radio wireless mesh networks. However, the assignment of channel to the radio poses significant challenges in the scarce spectrum. The goal of channel assignment strategy is to minimize interference and improve network performance. In this article we analyzed interference impact and traffic patterns that designed an interference-aware channel assignment strategy called ICAS. ICAS incorporates interference impact and traffic pattern issues in order to assign adaptive channel to multi-radio wireless mesh networks.
致 謝 iii
目 錄 iv
圖目錄 v
表目錄 vii
第一章 前言 1
第二章 背景知識 7
2-1、系統架構及環境 7
2-1-1、無線網路架構 7
2-1-2、無線網路頻譜 11
2-1-3、多頻無線網狀網路 12
2-2、無線網路干擾及影響 13
2-2-1、無線網路同頻干擾 13
2-2-2、無線網路干擾影響 14
2-3、多頻無線網狀網路頻道配置方法 16
2-4、多頻無線網狀網路頻道配置分類 18
2-5、相關研究 21
第三章 ICAS頻道配置策略 27
3-1、系統網路架構及概念 28
3-2、系統流程 29
3-2-1、鏈結合併(Links Binding) 31
3-2-2、鏈結集合排序(Link_sets Sorting) 36
3-2-3、頻道配置(Channel Assignment) 39
第四章 模擬與分析 46
4-1、多頻無線網狀網路模擬環境與相關參數 46
4-2、頻道配置模擬與分析 47
第五章 結論與未來工作 52
參考文獻 54
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