【摘要】：從光纖通信商用伊始,多媒體業(yè)務(wù)迅速發(fā)展,對(duì)網(wǎng)絡(luò)帶寬的需求急劇增加,而頻譜資源有限,促使光纖通信放棄粗放式的資源利用方式,不斷尋求高頻譜效率的網(wǎng)絡(luò)架構(gòu)。而當(dāng)前波分復(fù)用(Wavelength-Division Multiplexing, WDM)網(wǎng)絡(luò)采用ITU固定的50GHz頻譜粗粒度劃分機(jī)制,對(duì)頻譜資源的利用造成了浪費(fèi),在這樣的背景下,科學(xué)研究者們提出了在光纖通信中使用正交頻分復(fù)用(Orthogonal Frequency-Division Multiplexing, OFDM)技術(shù),該技術(shù)是一種多載波傳輸技術(shù),其將一個(gè)高速數(shù)據(jù)流分解到多個(gè)平行的低速數(shù)據(jù)信道進(jìn)行傳輸�；贠FDM的光網(wǎng)絡(luò)稱為彈性光網(wǎng)絡(luò)。 目前正是彈性光網(wǎng)絡(luò)的重要研究階段,從彈性光網(wǎng)絡(luò)的實(shí)現(xiàn)架構(gòu)、彈性光網(wǎng)絡(luò)的關(guān)鍵器件設(shè)計(jì)、到彈性光網(wǎng)絡(luò)的網(wǎng)絡(luò)算法均是研究熱點(diǎn)。本文的研究重點(diǎn)是彈性光網(wǎng)絡(luò)中路由頻譜資源配置機(jī)制與算法的研究。本文的主要工作歸納如下： (1)基于O-OFDM的彈性光網(wǎng)絡(luò)概述：通過(guò)研讀大量彈性光網(wǎng)絡(luò)相關(guān)論文并對(duì)核心觀點(diǎn)進(jìn)行了分析、總結(jié),對(duì)彈性光網(wǎng)絡(luò)的概念、彈性光網(wǎng)絡(luò)具有的主要性質(zhì)、彈性光網(wǎng)絡(luò)關(guān)鍵硬件的設(shè)計(jì)以及現(xiàn)有的主要網(wǎng)絡(luò)算法進(jìn)行了較詳細(xì)的介紹。 (2)提出自適應(yīng)分布式子載波路由頻譜配置(Adaptive Sub-carrier Distribution Routing and Spectrum Allocation, ASD-RSA)算法：論文將自適應(yīng)分布式子載波的概念應(yīng)用的彈性光網(wǎng)絡(luò)中(相對(duì)于集中式子載波配置方式,自適應(yīng)分布式子載波配置方式允許為一對(duì)通信節(jié)點(diǎn)自適應(yīng)地建立一條或者多條光路徑進(jìn)行信號(hào)傳輸,允許連接需求僅得到部分滿足),并對(duì)ASD-RSA算法與其他算法在靜態(tài)層、動(dòng)態(tài)層的不同網(wǎng)絡(luò)中進(jìn)行了仿真對(duì)比分析。試驗(yàn)證明ASD-RSA算法在現(xiàn)有算法的基礎(chǔ)上較大的降低了網(wǎng)絡(luò)阻塞率、提高了網(wǎng)絡(luò)頻譜資源的利用效率,同時(shí)得出在使用ASD-RSA算法的彈性光網(wǎng)絡(luò)中最佳備選路由路徑數(shù)量為3條。
[Abstract]:Since the beginning of commercial optical fiber communication, multimedia services have developed rapidly, the demand for network bandwidth has increased rapidly, and the spectrum resources are limited, which urges optical fiber communication to give up extensive resource utilization mode and constantly seek the network architecture with high spectrum efficiency. In the current wavelength Division Multiplexing (WDM) network, the 50GHz spectrum coarse-grained partition mechanism fixed by ITU is used to waste the spectrum resources. Scientific researchers have proposed the use of orthogonal Frequency Division Multiplexing (OFDM) technology in optical fiber communication, which is a multi-carrier transmission technology, which decomposes a high speed data stream into several parallel low-speed data channels for transmission. The optical network based on OFDM is called elastic optical network. At present, it is an important research stage of elastic optical network, from the realization of elastic optical network, the key device design of elastic optical network, to the network algorithm of elastic optical network are the research hotspot. This paper focuses on routing spectrum resource allocation mechanisms and algorithms in elastic optical networks. The main work of this paper is summarized as follows: (1) an overview of elastic optical networks based on O-OFDM: by studying a large number of papers on elastic optical networks and analyzing the core viewpoints, the concept of elastic optical networks is summarized. The main properties of elastic optical networks, The key hardware design of elastic optical network and the existing main network algorithms are introduced in detail. (2) A Adaptive Sub-carrier Distribution routing and allocation (ASD-RSA) algorithm is proposed. In elastic optical networks adapted to the conceptual application of distributed subcarriers (as opposed to centralized subcarrier configurations, Adaptive distributed subcarrier configuration allows the adaptive establishment of one or more optical paths for a pair of communication nodes for signal transmission, allowing the connection requirements to be partially satisfied), and for ASD-RSA algorithm and other algorithms in the static layer. The simulation results of different networks in dynamic layer are compared and analyzed. The experimental results show that ASD-RSA algorithm can greatly reduce the blocking rate of the network and improve the efficiency of spectrum resource utilization. At the same time, the optimal number of alternative routing paths in elastic optical networks using ASD-RSA algorithm is 3.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 肖媚;何動(dòng);張振榮;;基于OOFDM的彈性光網(wǎng)絡(luò)研究[J];光通信技術(shù);2013年04期

，

本文編號(hào)：2123151