【摘要】：近年來,隨著Internet網(wǎng)絡(luò)規(guī)模的急劇增大和應(yīng)用類型的日益豐富多樣,網(wǎng)絡(luò)的結(jié)構(gòu)和功能日趨復(fù)雜性,管控能力的逐漸變?nèi)?網(wǎng)絡(luò)資源分配問題越來越明顯。當(dāng)前網(wǎng)絡(luò)難以為各種業(yè)務(wù)提供QoS(Quality of Service,服務(wù)質(zhì)量)保證。因此,為新一代Internet網(wǎng)絡(luò)提供可靠的服務(wù)質(zhì)量保障是當(dāng)前計(jì)算機(jī)網(wǎng)絡(luò)研究的重要課題。SDN(Software Defined Network,軟件定義網(wǎng)絡(luò))的出現(xiàn)對(duì)實(shí)現(xiàn)網(wǎng)絡(luò)的可控可管具有十分重要的意義。然而,當(dāng)前SDN框架中并沒有實(shí)現(xiàn)對(duì)QoS業(yè)務(wù)的保障,仍有很大發(fā)展的空間。故需要一個(gè)全新的網(wǎng)絡(luò)體系架構(gòu)來滿足當(dāng)前網(wǎng)絡(luò)的發(fā)展,提供高質(zhì)量的QoS保障。為改變傳統(tǒng)網(wǎng)絡(luò)及其設(shè)備的無限狀態(tài)、不可精細(xì)控制、不可計(jì)算的現(xiàn)狀,本文提出了可計(jì)算網(wǎng)絡(luò)模型。且針對(duì)當(dāng)前網(wǎng)絡(luò)無法為各類業(yè)務(wù)提供高質(zhì)量保證的QoS服務(wù)的現(xiàn)狀,本文將SDN體系架構(gòu)與可計(jì)算網(wǎng)絡(luò)模型相結(jié)合,提出基于SDN的可計(jì)算網(wǎng)絡(luò)體系架構(gòu)。為實(shí)現(xiàn)對(duì)網(wǎng)絡(luò)的狀態(tài)進(jìn)行描述實(shí)現(xiàn)網(wǎng)絡(luò)的可計(jì)算,在可計(jì)算網(wǎng)絡(luò)模型中提出網(wǎng)絡(luò)狀態(tài)量化表示、網(wǎng)絡(luò)可計(jì)算原理、業(yè)務(wù)映射、Q業(yè)務(wù)映射和X業(yè)務(wù)映射等概念。本文提出的基于SDN的可計(jì)算網(wǎng)絡(luò)體系架構(gòu)主要為用戶提供兩類業(yè)務(wù)服務(wù):Q類和X類業(yè)務(wù)。其中,Q類業(yè)務(wù)主要包括語音、視頻等實(shí)時(shí)性業(yè)務(wù);X業(yè)務(wù)主要指?jìng)鹘y(tǒng)IP的盡力而為業(yè)務(wù)。本文主要采取資源預(yù)留的方式為Q類業(yè)務(wù)提供QoS保證。本文首先將網(wǎng)絡(luò)資源分為Q類和X類資源,對(duì)應(yīng)的Q類和X類業(yè)務(wù)分別交由Q類和X類控制器進(jìn)行管理和控制。其次,本文設(shè)計(jì)了數(shù)據(jù)包格式用于資源預(yù)留的請(qǐng)求和釋放,并在控制器中設(shè)計(jì)了處理Q類業(yè)務(wù)的功能模塊,具體包括:Q類資源分配與管理模塊、路徑選擇模塊、流量測(cè)量與監(jiān)控模塊。Q類資源分配與管理模塊主要實(shí)現(xiàn)對(duì)Q類資源的分配與釋放;路徑選擇模塊主要根據(jù)Q類業(yè)務(wù)的QoS要求完成路徑的計(jì)算;流量測(cè)量與監(jiān)控模塊主要實(shí)現(xiàn)對(duì)Q業(yè)務(wù)的監(jiān)控,判斷和驗(yàn)證它是否按照訂購的QoS要求執(zhí)行,并對(duì)Q類流的違規(guī)行為采取一定的處理策略。最后,本文以帶寬為例對(duì)Q業(yè)務(wù)進(jìn)行實(shí)驗(yàn)和測(cè)試驗(yàn)證,結(jié)果證明本文設(shè)計(jì)的處理Q類業(yè)務(wù)的各個(gè)功能模塊可以正常工作,能夠達(dá)到為Q業(yè)務(wù)提供QoS保障的目的。
[Abstract]:In recent years, with the rapid increase of the scale of Internet network and the increasing variety of application types, the structure and function of the network become more and more complex, the ability of management and control becomes weaker, and the problem of network resource allocation becomes more and more obvious. At present, it is difficult to provide QoS (quality of Service) guarantee for all kinds of services. Therefore, it is very important to provide reliable QoS assurance for the new generation Internet network. SDN (Software defined Network) is one of the most important topics in the research of computer network. The emergence of SDN (Software defined Network) is of great significance to realize the controllable management of the network. However, the current SDN framework does not guarantee QoS services, there is still a lot of room for development. Therefore, a new network architecture is needed to meet the current network development and provide high quality QoS guarantee. In order to change the infinite state of the traditional network and its equipment, the model of computable network is presented in this paper. Aiming at the current situation that the network can not provide high-quality QoS services for all kinds of services, this paper combines the SDN architecture with the computable network model, and proposes a computable network architecture based on SDN. In order to describe the state of the network and realize the computability of the network, the concepts of network state quantization representation, network computable principle, service mapping Q service mapping and X service mapping are put forward in the computable network model. In this paper, the architecture of SDN-based computable network provides two types of services: Q and X services for users. Among them, Q service mainly includes real time service such as voice, video and so on. This paper mainly adopts the way of resource reservation to provide QoS guarantee for class Q services. In this paper, the network resources are divided into Q class and X class resources. The corresponding Q class and X class services are managed and controlled by Q class and X class controllers, respectively. Secondly, this paper designs the request and release of data packet format for resource reservation, and designs the function module of dealing with class Q service in the controller, including: class Q resource allocation and management module, path selection module. The resource allocation and management module of class Q mainly realizes the allocation and release of class Q resources, and the path selection module completes the path calculation according to the QoS requirements of class Q services. The flow measurement and monitoring module mainly realizes the monitoring of Q traffic, judges and verifies whether it is executed according to the QoS requirements of the order, and adopts a certain strategy to deal with the violation of class Q flow. Finally, this paper takes the bandwidth as an example to test and verify the Q service. The results show that the functional modules designed in this paper can work normally and can provide QoS guarantee for the Q service.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP393.02

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本文編號(hào)：2129800