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研究生:紀長嘉
研究生(外文):Chang-Chia Chi
論文名稱:具載送表頭與資料區於不同極化狀態之新IP/DWDM架構設計與分析
論文名稱(外文):The Design and Analysis of a New IP/DWDM Architecture with Header and Payload Carried under Different Polarization States
指導教授:譚昌文
指導教授(外文):Chen-Wen Tarn
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:電子工程系
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:2001
畢業學年度:89
語文別:中文
論文頁數:83
中文關鍵詞:Optical NetworkPolarizationOptical SwitchingDense Wavelength Division MultiplexingMultiprotocol Label Switching
外文關鍵詞:光網路極化光學交換高密度分波多工多重協定標籤交換
相關次數:
  • 被引用被引用:0
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  • 下載下載:10
  • 收藏至我的研究室書目清單書目收藏:0
在本篇論文中,我們提出一新的IP/DWDM架構,並描述其分析與模擬結果。此新架構乃是將封包中之表頭與資料區分別載送於兩個正交線性極化,並以相同波長於光網路中傳送,透過全光burst交換技術與多重協定標籤交換(MPLS)技術於光網路中作路由。在光網路中,光路由器可以利用極化片(Polarizer)以全光形式將表頭與資料區分開,以便路由器執行信號路由。此方法可以避免利用複雜的光學結構或不同波長來分離表頭與資料區等問題,以達到減化系統複雜度與降低成本等目的。我們利用此新的傳送技術模擬封包經過50公里偏振恆持光纖(Polarization-Maintaining Fiber)傳送後之信號品質,同時比較利用於不同光交換方式經高密度分波多工技術傳送後其信號誤碼率(Bit Error Rate)。新架構的網路品質服務(Quality of Service)效能評估之模擬,包含波長利用率(Wavelength Utilization)、burst遺失機率(Burst Loss Probability)、排隊延遲(Queuing Delay)和網路吞吐量(Throughput)等。經由模擬結果,我們證實此新架構利用偏振恆持光纖來傳送burst,可以改善其遺失機率與減少光學緩衝器之大小等優點。

This thesis describes the analysis and simulation results of a new IP over dense wavelength division multiplexing (DWDM) architecture. This architecture is based on a novel ransmission approach that uses two orthogonal linear polarizations to carry the header and payload signals, respectively. Routing is based on optical burst switching (OBS) and multiprotocol label switching (MPLS) technologies. Optical routers split the header and payload signals by polarizers in the optic domain. This approach overcomes the problems that a optical packet is split into header and payload by complication optical architecture or transmitting separately on different wavelengths/channels. A simulation result for the case that an optical packet is transported through 50 km polarization-maintaining fiber link is presented. A comparison of the bit error ratio (BER) uses DWDM transmission technology with different optical switching methods is also made. Simulations are also conducted to evaluate the quality of service (QoS) performance in terms of wavelength utilization, burst loss probability, queuing delay, and throughput. We show the new architecture that uses polarization-maintaining fiber to transmit optical bursts, can improve the loss probability and decrease the optical buffer size.

1 Introduction
1.1 Overview IP over DWDM ................................1
1.2 Basic Transmission Methods in IP over DWDM Networks...4
1.2.1 Wavelength Routing .............................4
1.2.2 Optical Packet Switching .......................6
1.2.3 Optical Burst Switching (OBS) ..................6
1.2.4 Comparison Between Different Optical Switching
Methods ........................................7
1.3 New Transmission Method in Our Thesis ................9
1.4 Architecture of the Thesis ..........................11
2 A New Architecture of IP over DWDM 12
2.1 New IP over DWDM Network Topology ...................12
2.2 Modulation System for Edge Router ...................14
2.3 Bandwidth Reservation ...............................17
2.4 Architecture of Core Router .........................20
2.4.1 Label Swapping for IP over DWDM Networks ......20
2.4.2 Contention Resolution .........................22
2.5 The Offset Time Basic QoS Scheme with FDL Buffers ...25
2.5.1 Delay Reservation .............................26
2.5.2 Estimation of the Offset Time and End-to-End
Delay .........................................27
2.6 Summary .............................................30
3 Performances Analysis of the New IP over DWDM Architecture 32
3.1 Wavelength Utilization in IP over DWDM Networks .....32
3.2 Burst Loss Probability for IP over DWDM Networks ....34
3.3 Improvement Optical Buffer Size .....................39
4 Simulation Results and Discussion 42
4.1 The Wavelength Utilization for the IP over DWDM
Architecture ........................................42
4.2 The Burst Loss Probability for the IP over DWDM
Architecture ........................................48
4.2.1 The Loss Probability for the Network with and
without FDLs ..................................48
4.2.2 The Queuing Delay for the Network with FDLs ...56
4.2.3 The Throughput for the Network with and without
FDLs ..........................................60
4.3 Summary .............................................63
5 The Applications of Polarization for New IP over DWDM
Architecture Simulation 64
5.1 Simulation Results and Discussion ...................64
5.2 Comparison the Results for Different Optical Switching
Methods .............................................73
6 Conclusions and Future Works 77
6.1 Conclusions .........................................77
6.2 Future Works ........................................79

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