本文關鍵詞：基于SDN的園區(qū)網(wǎng)QoS技術(shù)研究與應用　出處：《西南交通大學》2017年碩士論文　論文類型：學位論文

  更多相關文章： 軟件定義網(wǎng)絡 OpenFlow協(xié)議 服務質(zhì)量 區(qū)分服務模型

【摘要】：計算機網(wǎng)絡最初設計的目標,只是實現(xiàn)單純的端到端數(shù)據(jù)傳送,發(fā)展至今的互聯(lián)網(wǎng),幾乎所有的流量都是建立在TCP/IP架構(gòu)之上,盡管設備性能有了飛躍性的提高,但網(wǎng)絡本身的架構(gòu)卻沒有突破性的變化。然而,隨著網(wǎng)絡中數(shù)據(jù)量級的飛速增大,傳統(tǒng)的盡力而為路由轉(zhuǎn)發(fā)的網(wǎng)絡體系,越來越難以滿足日益出現(xiàn)的新需求,服務質(zhì)量(Qualityof Service,QoS)在可靠性、有效性、可擴展性等技術(shù)與非技術(shù)方面亟需改善,針對數(shù)據(jù)包級的流量區(qū)分服務更是受到了硬件資源的限制,而其改進往往都是在進行"打補丁"般的被動修補,而非系統(tǒng)性解決方案,這從未來的發(fā)展來看無疑是飲鴆止渴。因此,本文在軟件定義網(wǎng)絡(Software Defined Network,SDN)這個具有極高管控權(quán)的架構(gòu)中,對網(wǎng)絡的QoS保障進行了研究與應用。針對當前SDN架構(gòu)中還沒有成系統(tǒng)的QoS管控體系,在綜合考慮SDN發(fā)展現(xiàn)狀、OpenFlow協(xié)議與用戶對QoS管理需求的基礎上,本文結(jié)合研究傳統(tǒng)網(wǎng)絡體系中的區(qū)分服務模型(Differentiated Service,DiffServ)的QoS技術(shù),基于支持OpenFlow協(xié)議規(guī)范的Floodlight控制器,設計并實現(xiàn)了一套QoS子系統(tǒng),將區(qū)分服務模型應用在了 SDN網(wǎng)絡環(huán)境中。在介紹了該課題的國內(nèi)外相關研究現(xiàn)狀并對SDN架構(gòu)、OpenFlow協(xié)議和QoS技術(shù)中的區(qū)分服務模型做出了研究分析后,本文提出了對QoS系統(tǒng)的功能與非功能需求分析。其后,對實現(xiàn)需求所要用到的控制轉(zhuǎn)發(fā)平面中的Floodlight控制器和OpenvSwitch交換機的主要核心模塊結(jié)構(gòu)進行了透徹解析,并設計了 QoS系統(tǒng)的整體框架。最后根據(jù)框架設計,實現(xiàn)了一套擁有端口隊列管理、服務類型管理、數(shù)據(jù)流分類標記和區(qū)分服務入隊策略四大組件的QoS子系統(tǒng)。在詳細闡述了其設計思想與具體實現(xiàn)方案后,搭建了 SDN環(huán)境下的實驗平臺,對比需求分析,通過實驗驗證了該系統(tǒng)能顯著提高網(wǎng)絡中數(shù)據(jù)流量的服務質(zhì)量。
[Abstract]:The goal of the initial design of computer network is to realize the pure end-to-end data transmission. Almost all the traffic is based on the TCP/IP architecture. Although the performance of the device has been improved by leaps and bounds, the architecture of the network itself has not made a breakthrough change. However, with the rapid increase of the data level in the network, the traditional network architecture of best effort routing and forwarding. It is becoming more and more difficult to meet the new demand. The quality of Service QoS (QoS) needs to be improved in terms of reliability, effectiveness, scalability and other technical and non-technical aspects. Packet level traffic differentiation services are limited by hardware resources, and their improvements are often "patched" as passive fixes, rather than systemic solutions. This is undoubtedly from the future development is drinking poison to quench thirst. Therefore, this paper defines the network software Defined Network. SDN), which has the extremely high control power, has carried on the research and the application to the network QoS safeguard. Aiming at the current SDN architecture, there is no systematic QoS management and control system. On the basis of considering the current situation of SDN development, the OpenFlow protocol and the user's requirement for QoS management are considered. This paper studies the QoS technology of differentiated Service DiffServ (DiffServ) in traditional network architecture. Based on the Floodlight controller which supports OpenFlow protocol specification, a set of QoS subsystem is designed and implemented. The differentiated service model is applied to the SDN network environment. In this paper, the domestic and foreign research status of this topic and the SDN architecture are introduced. After the research and analysis of the OpenFlow protocol and the differentiated service model in QoS technology, the functional and non-functional requirements of the QoS system are analyzed in this paper. The Floodlight controller in the control and forwarding plane and the main core module structure of the OpenvSwitch switch are analyzed thoroughly. Finally, according to the framework design, a set of port queue management and service type management are implemented. The QoS subsystem of the four components of data stream classification marking and differentiated service joining strategy. After the detailed elaboration of its design idea and concrete implementation scheme, the experimental platform under the SDN environment is built. Compared with the requirement analysis, it is proved that the system can improve the quality of service of the data traffic in the network.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP393.09

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