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研究生:簡仲勤
研究生(外文):Chung-Chin Chien
論文名稱:以REPORT訊息為基礎之高效率EPON動態頻寬分配演算法
論文名稱(外文):HEDBA:A High Efficient DBA Algorithm based on REPORT Message for EPONs
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:電機工程系碩士班
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:2007
畢業學年度:95
語文別:中文
論文頁數:49
中文關鍵詞:乙太被動式光纖網路動態頻寬分配演算法
外文關鍵詞:ethernet passive networkdynamic bandwidth allocation algorithm
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光通訊網路技術不斷地進步,使得骨幹網路及都會網路的傳輸速度快速提昇,加上使用者的頻寬要求日與劇增,突顯出『最後一哩』(Last Mile)在兩者之間的接取寬頻網路(Broadband Access Network)之瓶頸(Bottleneck)。基於架設成本低廉、維護容易、傳輸距離長等考量因素,乙太被動式光纖網路(EPON)是一個很受歡迎的寬頻接取網路技術。因為其上行傳輸方面採用多點對單點的分時多工技術(TDMA),為避免碰撞發生及提高網路效能,使得頻寬分配成為一個很重要的研究方向。
本論文提出一個高效率頻寬分配演算法,為改善中斷式輪詢機制(IPACT)的頻寬閒置時間,可以即時動態配置有限的上行頻寬,根據不同的網路流量分成四種排程機制:標準排程機制、重載排程機制、不平衡負載排程機制及輕載排程機制。最後藉由模擬證明高效率動態頻寬分配演算法可以提供高效能、低延遲,並改善頻寬利用率。
In recent years, optical network technology advances speedy, result in the transmission rate of the backbone and MAN upgrade fast constantly and the rapid of the user’s bandwidth request. “Last Mile” is the bottleneck problem between the the customers and backbone in the broadband access network. Due to low-cost of fiber infrastructure, maintain easy and transmission distance long etc., Ethernet Passive Optical Network(EPON)has been a popular technology of the broadband access networks.
In EPON, the upstream channel is a multipoint-to-point network, and OLT arbitrate the upstream bandwidth among ONUs without collisions and efficient dynamic bandwidth allocation is required.
This paper proposes a novel dynamic scheduling algorithm to improve the Idle Time of IPACT. HEDBA immediately allocate limited of the upstream bandwidth. According to different network traffic HEDBA divide four schedulings:normal load, heavy load, middle, light load. The results show that HEDBA can offer high throughput,
low delay and improve bandwidth utilization.
摘要
ABSTRACT
誌謝
目錄
圖目錄
表目錄
第一章、緒論
1-1簡介
1-2研究動機
1-2-1上行頻寬之閒置時間
1-2-2在重載下之REPORT訊息額外負擔
第二章、背景知識
2-1多點控制協定(MULTI-POINT CONTROL PROTOCOL,MPCP)
2-2相關研究
2-2-1INTERLEAVED POLLING WITH ADAPTIVE CYCLE TIME(IPACT)
2-2-2IMPROVED IPACT
2-2-3分散式頻寬管理
2-2-4具有QOS功能之頻寬分配機制
第三章、HEDBA ALGORITHM
3-1 EPON網路系統架構
3-2 GATE/REPORT格式
3-3 HEDBA ALGORITHM
3-3-1 SCENARIO1. 重載排程機制
3-3-2 SCENARIO2. 不平衡負載排程機制
3-3-3 SCENARIO3. 輕載排程機制
第四章、模擬結果
4-1Tg為5us之數據結果
4-2Tg為1us之數據結果
第五章 結論與未來研究工作
參考文獻
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