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研究生:許靜芳
論文名稱:在光波分割多工網路上進行動態繞徑之研究
論文名稱(外文):A study on dynamic routing in WDM networks
指導教授:黃能富黃能富引用關係
學位類別:博士
校院名稱:國立清華大學
系所名稱:資訊工程學系
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:2002
畢業學年度:90
語文別:英文
中文關鍵詞:光波分割多工網路
相關次數:
  • 被引用被引用:0
  • 點閱點閱:235
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  • 下載下載:9
  • 收藏至我的研究室書目清單書目收藏:1
由於網際網路規約使用的普及化,長久以來,提出一個適宜的光學網際網路解決方案以期能夠有效地且有彈性地利用光纖的超高頻寬容載劇增中的根基於網際網路之應用程式一直是一個關係重大的課題。事實上,此課題的核心乃在於交換型式的設計。在這份博士論文中,我們主要是探討在具波長轉換能力的光波分割多工網路上,以兩種交換型式為基礎,進行動態繞徑的相關研究;這兩種交換型式一是波長繞徑,另一則是光波巨量資料單位交換.
光波分割多工網路的興起是由波長繞徑的觀念開始的,而運用這項技術的網路就稱作波長繞徑網路。針對波長繞徑網路,我們提出了一個有調適性的繞徑策略名為加權最短花費路徑策略。此策略不僅考慮了連接線的花費與波長轉換所需的花費,而且也將負載平衡的效用納入考量。因此,這個策略目的在於尋找一個能夠將資源花費最小化,同時又能夠將所有連接線上的流量負載儘可能維持平衡的路徑。過程中,我們利用了一種輔助圖以提供連線建立與釋出的演算法。
光波巨量資料單位交換是一種進年來新興的交換型式,它能夠解決波長繞徑方式中頻寬無法有效利用的問題。在眾多的光波巨量資料單位交換規約中,及時規約是較為人所知的一個。一般而言,緩衝器需求對以及時規約為基礎的光波巨量資料單位交換來說並非不可缺少的。然而,若要提供轉向繞徑,則必須要有光學緩衝器存在以解決時距不足的問題。因此,本論文的的另一個研究主題是探討如何在光波巨量資料單位交換網路上支援轉向繞徑。我們提出了兩個能夠處理轉向繞徑的光學交換器架構以及幾個解決時距不足問題的可能方案。

ABSTRACT i
ACKNOWLEDGEMENTS ii
CONTENTS iii
LIST OF FIGURES v
CHAPTER 1 INTRODUCTION 1
1.1 WAVELENGTH ROUTING 1
1.2 OPTICAL BURST SWITCHING (OBS) 4
CHAPTER 2 RELATED WORKS 7
2.1 WAVELENGTH ROUTING 7
2.2 OBS AND DEFLECTION ROUTING 10
CHAPTER 3 AN ADAPTIVE ROUTING STRATEGY FOR WAVELENGTH -ROUTED NETWORKS 14
3.1 ROUTING STRATEGY 14
3.2 AUXILIARY GRAPH TRANSFORMATION 16
3.3 ROUTING ALGORITHM 18
3.4 ANALYTICAL MODEL 19
3.4.1 Assumptions 19
3.4.2 Definitions 20
3.4.3 Notations 20
3.4.4 The Distribution of the Number of Occupied Wavelengths on a Single Link 22
3.4.5 The Offered Traffic Load of a Specific Route 23
3.4.6 The Offered Traffic Load of a Specific Route 24
3.4.7 The Successive Substitution Approximation 25
3.5 NUMERICAL RESULTS 26
3.5.1 Simulation Model and Assumptions 26
3.5.2 Simulation Results 27
3.6 SUMMARY 49
CHAPTER 4 DEFLECTION ROUTING IN JET-BASED OBS NETWORKS 50
4.1 OPTICAL SWITCH ARCHITECTURE 50
4.2 FDL BUFFER DESIGN 53
4.3 DEFLECTION ROUTING OPERATIONS IN JET-BASED OBS 53
4.4 ANALYSIS 58
4.4.1 Assumptions for the Case without QoS Support 58
4.4.2 The Proposed Queuing Model for the Case without QoS Support 59
4.4.3 Additional Assumptions for the Case with QoS Support 63
4.4.4 The Proposed Queuing Model for the Case with QoS Support 63
4.5 NUMERICAL RESULTS 67
4.5.1 Simulation Results of the Case without QoS Support 67
4.5.2 Simulation Results of the Case with QoS Support 76
4.6 SUMMARY 79
CHAPTER 5 CONCLUSIONS 81
5.1 ADAPTIVE ROUTING IN WAVELENGTH-ROUTED NETWORKS 81
5.2 DEFLECTION ROUTING IN JET-BASED OPTICAL BURST-SWITCHED NETWORKS 82
BIBLIOGRAPHY 84

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