發(fā)布時間：2018-07-14 22:24

【摘要】：從光纖通信商用伊始,多媒體業(yè)務迅速發(fā)展,對網(wǎng)絡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)絡架構。而當前波分復用(Wavelength-Division Multiplexing, WDM)網(wǎng)絡采用ITU固定的50GHz頻譜粗粒度劃分機制,對頻譜資源的利用造成了浪費,在這樣的背景下,科學研究者們提出了在光纖通信中使用正交頻分復用(Orthogonal Frequency-Division Multiplexing, OFDM)技術,該技術是一種多載波傳輸技術,其將一個高速數(shù)據(jù)流分解到多個平行的低速數(shù)據(jù)信道進行傳輸�；贠FDM的光網(wǎng)絡稱為彈性光網(wǎng)絡。 目前正是彈性光網(wǎng)絡的重要研究階段,從彈性光網(wǎng)絡的實現(xiàn)架構、彈性光網(wǎng)絡的關鍵器件設計、到彈性光網(wǎng)絡的網(wǎng)絡算法均是研究熱點。本文的研究重點是彈性光網(wǎng)絡中路由頻譜資源配置機制與算法的研究。本文的主要工作歸納如下： (1)基于O-OFDM的彈性光網(wǎng)絡概述：通過研讀大量彈性光網(wǎng)絡相關論文并對核心觀點進行了分析、總結,對彈性光網(wǎng)絡的概念、彈性光網(wǎng)絡具有的主要性質、彈性光網(wǎng)絡關鍵硬件的設計以及現(xiàn)有的主要網(wǎng)絡算法進行了較詳細的介紹。 (2)提出自適應分布式子載波路由頻譜配置(Adaptive Sub-carrier Distribution Routing and Spectrum Allocation, ASD-RSA)算法：論文將自適應分布式子載波的概念應用的彈性光網(wǎng)絡中(相對于集中式子載波配置方式,自適應分布式子載波配置方式允許為一對通信節(jié)點自適應地建立一條或者多條光路徑進行信號傳輸,允許連接需求僅得到部分滿足),并對ASD-RSA算法與其他算法在靜態(tài)層、動態(tài)層的不同網(wǎng)絡中進行了仿真對比分析。試驗證明ASD-RSA算法在現(xiàn)有算法的基礎上較大的降低了網(wǎng)絡阻塞率、提高了網(wǎng)絡頻譜資源的利用效率,同時得出在使用ASD-RSA算法的彈性光網(wǎng)絡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.
【學位授予單位】：廣西大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.1

【參考文獻】

相關期刊論文 前1條

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

，

本文編號：2123151