本文選題：光網(wǎng)絡 + 軟件定義網(wǎng)絡�。� 參考：《電子科技大學》2015年碩士論文

【摘要】：隨著光網(wǎng)絡技術的快速發(fā)展,光網(wǎng)絡經(jīng)歷了從SDH(Synchronous Digital Hierarchy)到WDM(Wavelength Division Multiplexing),再到OTN(Optical Transport Network)技術的變化過程。盡管傳統(tǒng)的光網(wǎng)絡技術發(fā)展較快且傳輸速度也大幅度提高,但它的不足之處仍逐漸凸現(xiàn)了出來。傳統(tǒng)的光網(wǎng)絡采用封閉式的控制平面對網(wǎng)絡進行分布式控制,它的控制接口封閉且沒有標準化,使得網(wǎng)絡管理策略不能被定制化,也不能實時地、動態(tài)地改變光網(wǎng)絡的邏輯拓撲結(jié)構,以適應不斷變化的新業(yè)務需求。近年來,SDN(Software Defined Network)技術被認為能很好的解決傳統(tǒng)光網(wǎng)絡的缺陷問題。SDN將網(wǎng)絡的控制面從網(wǎng)絡設備中分離出來,將其運用于邏輯上集中的控制器上,并為應用提供標準化的北向接口和通過標準化協(xié)議控制下層設備。這樣,SDN使得光網(wǎng)絡的控制變得更加靈活�？刂破魇荢DN光網(wǎng)絡的大腦,控制和管理整個網(wǎng)絡。因此,本文的主要研究目標是基于NOX光網(wǎng)絡控制器的光網(wǎng)絡控制平面的關鍵技術。首先,論文第二章以NOX為平臺,OpenFlow為核心協(xié)議,對光網(wǎng)絡控制器進行詳細地設計,然后設計和實現(xiàn)了基于NOX平臺的光網(wǎng)絡控制器與用戶應用程序、網(wǎng)絡應用程序、光交換設備之間的接口協(xié)議。論文第三章通過FlowVisor平臺來實現(xiàn)光網(wǎng)絡虛擬化的設計,將光網(wǎng)絡設備端口劃分為多個虛擬端口,每個虛擬端口占用一定的波長資源。這樣的結(jié)果使得虛擬光網(wǎng)絡的劃分精確到了每個端口的每個波長。其次,論文第四章研究了靜態(tài)虛擬光網(wǎng)絡規(guī)劃問題。與傳統(tǒng)光網(wǎng)絡規(guī)劃問題不同,為了降低虛擬網(wǎng)絡的管理復雜度,虛擬光網(wǎng)絡規(guī)劃問題需要盡量減少虛擬節(jié)點的數(shù)目。論文首先將靜態(tài)虛擬光網(wǎng)絡規(guī)劃問題描述為一個混合整數(shù)規(guī)劃問題,然后,為了能在大規(guī)模網(wǎng)絡中有效的求解該問題,論文還提出了一種高效的啟發(fā)式算法,最后通過仿真驗證了算法的有效性。最后,論文第五章研究了動態(tài)虛擬光網(wǎng)絡規(guī)劃問題。在動態(tài)虛擬光網(wǎng)絡規(guī)劃問題中,業(yè)務矩陣不再是一個確定的值,而是一組對應于多個時段的業(yè)務量矩陣集合。動態(tài)虛擬光網(wǎng)絡規(guī)劃的目標是為多個時段的業(yè)務量矩陣規(guī)劃出一個統(tǒng)一的虛擬網(wǎng)絡映射方案。為了解決該問題,論文設計了三種具有不同性能和復雜度的啟發(fā)式算法,并仿真比較了三種算法的性能。
[Abstract]:With the rapid development of optical network technology, optical network has experienced the process from SDH(Synchronous Digital hierarchy to WDM(Wavelength Division Multiplexing, and then to OTN(Optical Transport Network. Although the traditional optical network technology is developing rapidly and the transmission speed is greatly improved, its shortcomings have been gradually highlighted. The traditional optical network uses closed control plane to control the network distributed, its control interface is closed and has no standardization, so the network management strategy can not be customized, nor can it be real-time. The logical topology of optical network is changed dynamically to adapt to the new business requirements. In recent years, SDN Software Defined Network (SDN) technology has been considered to be a good solution to the defects of traditional optical networks. SDN separates the control surfaces of networks from network devices and applies them to logically centralized controllers. And provide standardized north interface for application and control lower equipment through standardization protocol. In this way, SDN makes the control of optical network more flexible. The controller is the brain of the SDN optical network, which controls and manages the entire network. Therefore, the main research goal of this paper is the key technology of optical network control plane based on NOX optical network controller. Firstly, in the second chapter, we design the optical network controller based on NOX platform, and then design and implement the optical network controller based on NOX platform and user application program, network application program. Interface protocol between optical switching devices. In the third chapter, the design of optical network virtualization is realized through FlowVisor platform. The optical network device port is divided into several virtual ports, and each virtual port occupies a certain wavelength resource. This results in the division of virtual optical networks to each wavelength of each port. Secondly, in the fourth chapter, the static virtual optical network planning problem is studied. Different from the traditional optical network planning problem, in order to reduce the management complexity of the virtual network, the virtual optical network planning problem needs to reduce the number of virtual nodes as far as possible. In this paper, the static virtual optical network planning problem is first described as a mixed integer programming problem. Then, in order to solve the problem effectively in large-scale networks, an efficient heuristic algorithm is proposed. Finally, the effectiveness of the algorithm is verified by simulation. Finally, in chapter 5, the dynamic virtual optical network planning problem is studied. In the dynamic virtual optical network planning problem, the traffic matrix is no longer a definite value, but a set of traffic matrices corresponding to multiple periods of time. The goal of dynamic virtual optical network planning is to plan a unified virtual network mapping scheme for multiple time periods of traffic matrix. In order to solve this problem, three heuristic algorithms with different performance and complexity are designed, and the performance of the three algorithms is simulated and compared.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN929.1

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