本文選題：網(wǎng)絡(luò)虛擬化　切入點(diǎn)：虛擬網(wǎng)絡(luò)映射　出處：《南京郵電大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：網(wǎng)絡(luò)虛擬化作為未來(lái)異構(gòu)網(wǎng)絡(luò)融合的重要支撐技術(shù)已經(jīng)獲得越來(lái)越廣泛的關(guān)注和研究,它通過分割和整合基礎(chǔ)設(shè)施網(wǎng)絡(luò)資源以滿足若干虛擬網(wǎng)絡(luò)并行共享底層網(wǎng)絡(luò)的業(yè)務(wù)需求,從而支持新網(wǎng)絡(luò)協(xié)議和應(yīng)用的開發(fā)、測(cè)試及部署。虛擬網(wǎng)絡(luò)資源映射是網(wǎng)絡(luò)虛擬化的重要組成部分,其目的是實(shí)現(xiàn)物理網(wǎng)絡(luò)與虛擬網(wǎng)絡(luò)之間的資源最優(yōu)匹配,以保證相對(duì)獨(dú)立的虛擬網(wǎng)絡(luò)能夠支持?jǐn)?shù)據(jù)業(yè)務(wù)的正常應(yīng)用和運(yùn)作。虛擬網(wǎng)絡(luò)生存性直接關(guān)系著網(wǎng)絡(luò)運(yùn)營(yíng)商的經(jīng)濟(jì)利益和終端用戶的服務(wù)體驗(yàn),針對(duì)增強(qiáng)虛擬網(wǎng)絡(luò)的生存性問題,本論文從資源映射的角度出發(fā)主要研究了如下三個(gè)方面:(1)提出了一種基于有效帶寬的虛擬網(wǎng)絡(luò)多路徑路由算法。該算法將基于業(yè)務(wù)流到達(dá)過程的有效帶寬模型引入到虛擬網(wǎng)絡(luò)鏈路資源映射中,根據(jù)鏈路的可靠性屬性構(gòu)建了鏈路的多路徑集合,以提高承載數(shù)據(jù)業(yè)務(wù)的鏈路可靠性。仿真結(jié)果表明所提出的算法在平衡網(wǎng)絡(luò)負(fù)載、提高網(wǎng)絡(luò)吞吐量以及虛擬網(wǎng)絡(luò)穩(wěn)定性方面表現(xiàn)出特定的優(yōu)越性。(2)提出了一種基于分治策略的增強(qiáng)虛擬網(wǎng)絡(luò)生存性的映射機(jī)制。該機(jī)制將分而治之的思想引入到虛擬網(wǎng)絡(luò)生存性映射之中,根據(jù)實(shí)際的網(wǎng)絡(luò)管理與控制需求將龐大的物理網(wǎng)絡(luò)劃分為若干子網(wǎng),并結(jié)合歷史故障數(shù)據(jù)調(diào)整和優(yōu)化共享資源池以簡(jiǎn)化虛擬網(wǎng)絡(luò)重映射的復(fù)雜度。同時(shí)基于網(wǎng)絡(luò)拓?fù)浜途W(wǎng)絡(luò)元素單元篩選可恢復(fù)度高的物理單元以響應(yīng)虛擬網(wǎng)絡(luò)映射請(qǐng)求,最后利用處理能力、可靠性約束、地理位置等資源屬性建立資源相似度模型和度量機(jī)制以提高虛擬網(wǎng)絡(luò)重映射的成功率。仿真結(jié)果表明該機(jī)制可以有效提高虛擬網(wǎng)絡(luò)請(qǐng)求的彈性空間,在提升虛擬網(wǎng)絡(luò)接受率和生存性方面具有顯著的作用。(3)設(shè)計(jì)和實(shí)現(xiàn)了一個(gè)以負(fù)載均衡為優(yōu)化目標(biāo)的虛擬網(wǎng)絡(luò)驗(yàn)證系統(tǒng)。VTN負(fù)責(zé)接收業(yè)務(wù)請(qǐng)求并整合成虛擬網(wǎng)絡(luò)請(qǐng)求、Controller負(fù)責(zé)根據(jù)VTN請(qǐng)求創(chuàng)建和映射虛擬網(wǎng)絡(luò)、OpenFlow交換機(jī)則負(fù)責(zé)提供底層支持。測(cè)試結(jié)果表明該系統(tǒng)可以作為一個(gè)小型的虛擬網(wǎng)絡(luò)調(diào)優(yōu)系統(tǒng)。
[Abstract]:Network virtualization as an important supporting technology of future integration of heterogeneous network has received more and more attention and study, it is through the segmentation and integration infrastructure to meet a number of cyber source virtual network parallel shared underlying network business development needs, to support the new network protocols and applications, testing and deployment of virtual cyber source mapping is an important. Part of network virtualization, the aim is to achieve the optimal resource between physical network and virtual network, to ensure that the virtual network can support relatively independent data services should be used and normal operation. Virtual network survivability is directly related to the economic interests of network operators and end users of the service experience, to enhance the survivability the problem of virtual network, mainly studies the following three aspects from the perspective of resource mapping in this paper: (1) propose a method based on Multi path routing algorithm of virtual network bandwidth. The algorithm model of effective bandwidth traffic arrival process based on mapping to link resources in the virtual network, according to the reliability attribute link to construct a multi path link set, in order to improve the reliability of link bearing data service. The simulation results show that the proposed algorithm in balancing network load, improve the network throughput and virtual network stability show superior specific. (2) proposed a mapping mechanism based on divide and conquer strategy to enhance the virtual network survivability. The mechanism will divide and rule is introduced to the virtual network survivability mapping, network management and control according to the actual needs of the physical network division large into several sub networks, and combined with the history fault data of the adjustment and optimization of the shared resource pool to simplify the complexity of virtual network mapping. At the same time, network topology and network element screening can restore a high degree of physical unit in response to requests based on virtual network mapping, the processing ability, reliability constraints, such as geographical location resources attribute similarity model and establish resource measurement mechanism to improve the success rate of virtual network mapping. The simulation results show that the mechanism can effectively improve the flexibility of virtual space network request, in the virtual network acceptance rate and survivability is significant. (3) the design and implementation of a load balancing is responsible for receiving the service request and the synthesis of virtual network requests for virtual network authentication optimization system.VTN, Controller is responsible for creating and mapping VTN according to the request of virtual network, OpenFlow the switch is responsible for providing basic support. The test results show that this system can be used as a virtual network optimization system is small.

【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN915.0

【參考文獻(xiàn)】

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1 肖藹玲;王穎;孟洛明;邱雪松;李文t，

本文編號(hào)：1575114