English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 64745/64745 (100%)
造訪人次 : 20441145      線上人數 : 366
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋


    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/8536


    題名: 以訊務觀察法改善光突發交換技術之路徑建立效能;Improving Path Setup Performance of Optical Burst Switching by Traffic State Observation
    作者: 汪政儫;Cheng Wang
    貢獻者: 資訊工程研究所
    關鍵詞: 高密度多波長分工;多波長分工;光突發式交換;光纖網路;訊務觀察;optical burst switching;optical network;DWDM;WDM;traffic observation
    日期: 2001-07-19
    上傳時間: 2009-09-22 11:29:38 (UTC+8)
    出版者: 國立中央大學圖書館
    摘要: 光纖網路(Optical Network)技術日亦成熟,其中以突發式交換(Optical Burst Switching)技術為目前較為可行之技術。在此技術中的傳輸單位為burst,一個burst是由多個到達相同邊際路由器(edge router)封包所組成。每一個burst在傳送之前需要等待一個路徑建立時間之後才可傳送。因此本論文提出一以訊務量觀察的方式,在觀察訊務量之狀況高於一預設之門檻值時,以建立一永久式路徑取代原burst用完即查除之路徑,使得後續相同目的地之burst得以省去建立路徑之動作與時間,待觀察知訊務量降低至一界限值,即拆除此永久式路徑。在永久式路徑建立到拆除這段期間,因每一個burst無須重建路徑,亦無須等待路徑建立之時間,當burst形成之後可以立即傳送,因此該路徑的傳輸效能得以增加。在本論文中,亦提出一慣用性通道排程法,使得使用率較高的路徑在交換機中具有較高的路徑建立成功率。 The technologies of optical networks become more and more mature. The optical burst switching is the most feasible way for transmitting optical data. A burst is a basic atom in optical burst switching networks. A burst is assembled from several packets that will reach the same destination in an edge router. Before burst transmission, the edge needs to send a BHP (burst header packet) to establish a path for burst transmission and wait for an offset time. This paper proposed a method using traffic observation to remove the offset time from bursts. When edge router detect traffic volume over a threshold. It will establish a persistent path instead of original temporary path. That will cause the follow up bursts to the same destination need not send BHPs and transmit immediately. Till the traffic volume is smaller then the threshold, the edge router will tear down this persistent path. The duration between a persistent path establish and tear down, each burst can transmit immediately so that the transmission performance will be increased. In the end of this paper, a consuetude channel schedule algorithm is proposed. It make a highly utilized path will have a higher probability to reserve channel at core optical switch.
    顯示於類別:[資訊工程研究所] 博碩士論文

    文件中的檔案:

    檔案 大小格式瀏覽次數
    0KbUnknown581檢視/開啟


    在NCUIR中所有的資料項目都受到原著作權保護.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋  - 隱私權政策聲明