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研究生:林俊彥
研究生(外文):Chun-Yan Lin
論文名稱:在DWDM中具QoS之FastProcessOBS
論文名稱(外文):Fast process OBS supported Quality of Service in DWDM networks
指導教授:吳中實
指導教授(外文):Jung-Shyr Wu
學位類別:碩士
校院名稱:國立中央大學
系所名稱:通訊工程研究所
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:中文
論文頁數:63
中文關鍵詞:高密度分波多工光纖通訊
外文關鍵詞:DWDMOBSOptical NetworkSwitchingSchedul
相關次數:
  • 被引用被引用:0
  • 點閱點閱:104
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  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0

論文摘要

由於網路上多媒體即時傳輸及各種寬頻網路應用的發展日新月異,Internet 對於多媒體通訊服務如WWW embedded or plug-in 、Real time Voice /Video ,電子商務,網路電話(IP-Telephone) 、WebTV …等的要求與日俱增,對於高速網路的需求日益殷切,雖然Optical Fiber 的鋪設提高了主幹的頻寬,但對於指數成長的網路流量仍不敷所需。 近年來高密度分波多工技術(Dense Wavelength Division Multiplexing-DWDM)的發展,以高密度的分波多工器及光放大器所組成的光纖網路,已經對傳統的傳輸網路帶來了革命性的改變;它不僅大大地提昇了骨幹傳輸網路的頻寬,而且降低網路費用以及使網路傳輸系統的控制維護趨於簡單。但傳統Sonet/SDH Circuit Switch 的傳輸型態Over head 較大,降低了整體的效能而為了簡化通信協定,提高傳輸效能IP over DWDM的應用也因應而生 。

傳統IP V4 的網路只提供了best effort 的傳輸服務,對於資料型態多元化,服務要求複雜化的Next Generation Optical Internet 實是不敷所需。因此在DWDM 上建立一套完整的QoS機制,便成為建制All Optical Network 的熱門話題,尤其在經歷IP over ATM 數年來的研究,以及MPLS 的發展,QoS in Internet 已是大勢所趨,未來提供QoS的網路管理將是一大課題。

所以如何透過簡單的機制來有效管理QoS in DWDM Network 及增進IP over DWDM的傳輸效能,簡少Optical buffer的需求便是我未來研究的目標。


Abstract:

Dense Wavelength-division multiplexing has emerged as an important physical layer technology. Optical transmission provides a physical layer capable of carrying bits at the speed of the order of a gigabit per second. Optical burst switching is proposed to overcome the shortcomings of conventional WDM deployment, such as lack of fine bandwidth granularity in wavelength routing and electronic speed bottlenecks in SONET/SDH. In this article, we describe an architecture for IP network over the OBS DWDM transmission core. The use of MPLS-type technique for forwarding data bursts and the inclusion of a medium access control layer between the optical (DWDM) and IP layers are the key ingredients of the proposed architecture.

In particular, the architecture is based on provisioning MPLS paths, also called label switched paths, of desired quality of service through the OBS WDM transmission core. The MAC layer performs various OBS-specific functions, such as burst assembly, burst scheduling, and offset setting/traffic shaping. While burst assembly and burst scheduling are relatively straightforward, we point out that the offset setting strategy has significant impact on the performance of IP network operating over OBS DWDM core.

We describe a shaping scheme to set the offset, an important system parameter for OBS, between the successive data bursts of a given data stream (label switched path) and their associated control packets. This scheme results in robust operation of the network and also facilitates traffic engineering. Guidelines are provided for implementing various IP QoS mechanisms in the optical backbone using OBS.


目錄

目錄……………………………………………Ⅰ
圖目……………………………………………Ⅲ
表目……………………………………………Ⅵ

第一章序論
1.1 前言………………………………………1
1.2 動機………………………………………2
1.3 論文組織架構……………………………3

第二章 DWDM網路系統架構介紹
2.1 DWDM系統之介紹
2.1.1 什麼是DWDM…………………………5
2.1.2 OBS系統之介紹
2.1.2.1 OBS系統的概念………………7
2.1.2.2 邊界路由器(Edge Router)…8
2.1.2.3 核心路由器(Core Router)…9
2.1.3 DWDM相關設備介紹…………………10
2.1.4 IP over DWDM………………………14
2.1.5 資料通道排程介紹…………………15

第三章 動態頻寬調整機制介紹
3.1 前言………………………………………17
3.2 動態頻寬調整流程介紹…………………19

第四章 模擬分析及數據討論
4.1 前言………………………………………31
4.2 數據結果之分析與討論
4.2.1 類別A發生重載的情形………………………………32
4.2.2 類別B發生重載的情形………………………………35
4.2.3 類別C發生重載的情形………………………………39
4.2.4 類別A及類別B同時發生重載的情形……………… 43
4.2.5 類別A及類別C同時發生重載的情形……………… 46
4.2.6 類別B及類別C同時發生重載的情形……………… 50
4.2.7 類別A及類別B及類別C同時發生重載的情形………54
4.3 結論………………………………………………………59

第五章 結論與未來展望 60

參考文獻 61


參考文獻[1]Yijun Xiong; Vandenhoute, M.; Cankaya, H.C. “Control architecture in optical burst-switched WDM networks ”Selected Areas in Communications, IEEE Journal on , Volume: 18 Issue: 10 , Oct. 2000[2]Golmie, N.; Ndousse, T.D.; Su, D.H. “A differentiated optical services model for WDM networks ”IEEE Communications Magazine , Volume: 38 Issue: 2 , Feb. 2000 Page(s): 68 -73[3]Myungsik Yoo; Chunming Qiao “A novel switching paradigm for buffer-less WDM networks ”Optical Fiber Communication Conference, 1999, and the International Conference on Integrated Optics and Optical Fiber Communication. OFC/IOOC '99. Technical Digest , 1999 Page(s): 177 -179 vol.3[4]Nasir Ghani Nasir Ghani, Ph.D.“IP Over Optical Networks”Industry Program Chair, OPTICOMM 2000[5]Tench, R.E. “Challenges in the design and packaging of optical amplifiers for DWDM lightwave networks”Electronic Components and Technology Conference, 1999. Proceedings. 49th , Page(s): 9 -12[6]Shaowen Song “Switching issues in the all optical DWDM network”Electrical and Computer Engineering, 2000 Canadian Conference on , Volume: 2 , 2000 Page (s): 998 -1002 vol.2[7]Kuang-Yi Wu; Jian-Yu Liu “Self-routing wavelength switches” Vertical-Cavity Lasers, Technologies for a Global Information Infrastructure, WDM Components Technology, Advanced Semiconductor Lasers and Applications, Gallium Nitride Materials, Processing, and Devices, 1997 Digest of the IEEE/LEOS Summer Topical Meetin , 1997 Page(s): 30 -31[8]Malis, A.G. “Reconstructing transmission networks using ATM and DWDM”IEEE Communications Magazine , Volume: 37 Issue: 6 , June 1999 Page(s): 140 -145[9]Mysore, S.; Villa, R.; Beveridge, G. “Performance of broadband DWDM networks”Electronic-Enhanced Optics, Optical Sensing in Semiconductor Manufacturing, Electro-Optics in Space, Broadband Optical Networks, 2000. Digest of the LEOS Summer Topical Meetings , 2000 Page(s): IV23 -IV24[10]Callegati, F.; Casoni, M.; Raffaelli, C.“Packet optical networks for high- speed TCP-IP backbones”IEEE Communications Magazine , Volume: 37 Issue: 1 , Jan. 1999 Page(s): 124 -129[11]Strand, J.; Chiu, A.L.; Tkach, R“Issues for routing in the optical layer” IEEE Communications Magazine , Volume: 39 Issue: 2 , Feb. 2001 Page(s): 81 - 87[12]Junhua Tang; Liren Zhang “Effect of IP traffic on optical QoS in DWDM networks”Networks, 2000. (ICON 2000). Proceedings. IEEE International Conference on , 2000 Page(s): 370 -374[13]Hunter, D.K.; Nizam, M.H.M.; Chia, M.C.; Andonovic, I.; Guild, K.M.; Tzanakaki, A.; O'Mahony, M.J.; Bainbridge, L.D.; Stephens, M.F.C.; Penty, R.V.; White, I.H.“WASPNET: a wavelength switched packet network”IEEE Communications Magazine , Volume: 37 Issue: 3 , March 1999 Page(s): 120 -129[14]Verma, S.; Chaskar, H.; Ravikanth, R. “Optical burst switching: a viable solution for terabit IP backbone”IEEE Network , Volume: 14 Issue: 6 , Nov.- Dec. 2000 Page(s): 48 -53[15]Myungsik Yoo; Chunming Qiao; Dixit, S. “Optical burst switching for service differentiation in the next-generation optical Internet”IEEE Communications Magazine , Volume: 39 Issue: 2 , Feb. 2001 Page(s): 98 -104

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