带宽可变的弹性光网络路由频谱配置机制与算法研究
发布时间：2018-07-14 22:24
【摘要】：从光纤通信商用伊始,多媒体业务迅速发展,对网络带宽的需求急剧增加,而频谱资源有限,促使光纤通信放弃粗放式的资源利用方式,不断寻求高频谱效率的网络架构。而当前波分复用(Wavelength-Division Multiplexing, WDM)网络采用ITU固定的50GHz频谱粗粒度划分机制,对频谱资源的利用造成了浪费,在这样的背景下,科学研究者们提出了在光纤通信中使用正交频分复用(Orthogonal Frequency-Division Multiplexing, OFDM)技术,该技术是一种多载波传输技术,其将一个高速数据流分解到多个平行的低速数据信道进行传输。基于OFDM的光网络称为弹性光网络。 目前正是弹性光网络的重要研究阶段,从弹性光网络的实现架构、弹性光网络的关键器件设计、到弹性光网络的网络算法均是研究热点。本文的研究重点是弹性光网络中路由频谱资源配置机制与算法的研究。本文的主要工作归纳如下： (1)基于O-OFDM的弹性光网络概述：通过研读大量弹性光网络相关论文并对核心观点进行了分析、总结,对弹性光网络的概念、弹性光网络具有的主要性质、弹性光网络关键硬件的设计以及现有的主要网络算法进行了较详细的介绍。 (2)提出自适应分布式子载波路由频谱配置(Adaptive Sub-carrier Distribution Routing and Spectrum Allocation, ASD-RSA)算法：论文将自适应分布式子载波的概念应用的弹性光网络中(相对于集中式子载波配置方式,自适应分布式子载波配置方式允许为一对通信节点自适应地建立一条或者多条光路径进行信号传输,允许连接需求仅得到部分满足),并对ASD-RSA算法与其他算法在静态层、动态层的不同网络中进行了仿真对比分析。试验证明ASD-RSA算法在现有算法的基础上较大的降低了网络阻塞率、提高了网络频谱资源的利用效率,同时得出在使用ASD-RSA算法的弹性光网络中最佳备选路由路径数量为3条。
[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.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.1
本文编号：2123151
[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.
【学位授予单位】：广西大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.1
【参考文献】
相关期刊论文 前1条
1 肖媚;何动;张振荣;;基于OOFDM的弹性光网络研究[J];光通信技术;2013年04期
，本文编号：2123151
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