多協議標記交換網路界接服務品質保證之研究

QoS Guarantee in Interconnected DiffServ Based on MPLS Network

劉有順(Yu-Sunn Liu)

指導教授 ： 黃依賢

元智大學/資訊學院/資訊工程學系/碩士(2002年)

摘要

隨著網路傳輸資料型態的不同，如：Voice、Data和Video，傳統的整合性服務模式(Integrated Service model)已無法滿足使用者對不同服務品質(QoS)的需求。因應而生的是差異性服務模式(Differentiated Services model)，對於不同服務的層級(Class)訂定不同的傳送策略，對於ISP業者而言，也可因此有不同的收費標準。隨著傳輸速度的激增，在骨幹網路中的差異性服務的類別機制也顯得不敷使用。一種重要的網路交換技術多協議標記交換網路(MPLS：Multi Protocol Label Switch)已然完成，MPLS專精於網路中傳輸品質保證的技術，它可不必單獨維護資料流中資料的流向路徑，而確保網路端對端傳輸的品質。MPLS網路技術在標記裡有適當的欄位提供簡單的服務等級記載，因為標記具備簡短且固定長度的性質，能提供一種較簡捷的資料傳輸方式，進而可以改善網路的擴充性。當差異性服務網路界接(Interconnected)於MPLS網路時，如何確保網路服務品質是一個值得探討的問題。本論文研究將適用於有線及無線網路差異性服務與MPLS界接網路環境，提出新的頻寬管理法則，並且此法則將依即時性調整、週期性調整及阻絕率判斷以固定或動態方式調整頻寬，使其有效地增加頻寬的使用率和降低阻絕率。此提出界接之服務品質承接法則，可解決界接承接影響服務品質的因素、動態資源調整給予不同的服務品質保證，並評估整體效能以期找出不同服務等級應有的服務品質。在有線與無線界接網路設備中如何提供服務品質的轉承，將是一個邁向無線寬頻時代相當重要課題，也是本篇論文的主要訴求。
關鍵字：多協議標記交換 (MPLS：Multi Protocol Label Switch)，界接(Interconnected)，差異性服務編碼要點(Differentiated Service Code Point)，單次轉送行為(Per Hop Behavior

關鍵字

多協議標記交換 ； 界接 ； 差異性服務編碼要點 ； 單次轉送行為

並列摘要

Because of the diversity of Internet information transit such as Voice, Data and Video, the traditional Integrated Service Model can no longer satisfy the users’ requirements for the different qualities of services. A Differentiated Services Model was designed to meet the different transit stratagem for the services of different Classes and different charging standards for ISP business. Along with the rapid increase in transit speed, the Differentiated Services Model seems to lag behind, especially in the interconnected switches for different Internet services. To adjust the channel bandwidth of the (frequency) temporarily or regularly becomes a pressing task needed to be conquered. An important internet technique MPLS (Multi Protocol Label Switch), guaranteeing the qualities of the transited materials in internet, can insure high qualities of an internet terminal to terminal transit, with no need to service the flowing paths of datagram information in the current information. Besides, it can improve the expansion of Internet and offer a simple service class to the class-marked ISP. With its characteristic in marking short, simple, fixed lengths, the MPLS can provide a compact way of information transit. The purpose of the thesis is to create a new Bandwidth Control System for the Differentiated Services Model and MPLS. The System can adjust itself automatically according to the temporary adjustment, regular adjustment and the block out percentage of the bandwidth; hence, it can effectively increase the usage percentage and cut down the block out percentage of the bandwidth. Hopefully the System can offer a connected principle for the Interconnected Service Quality solving the major factors that influence the qualities while using Interconnected. Judging from the effect of the whole, and finding out different service qualities for different Classes, the auto adjustment principle (the System) can offer a completely different style of guaranty for different quality of services.
Keywords：MPLS (Multi Protocol Label Switch)，Interconnected，DSCP，PH

並列關鍵字

Multi Protocol Label Switch ； Interconnected ； Differentiated Service Code Point ； Per Hop Behavior

參考文獻

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