弹性光网络中基于路径分割最优化成本模型研究

发布时间：2018-05-30 15:24

本文选题：弹性光网络 + 建网成本　；参考：《南京邮电大学》2017年硕士论文

【摘要】：近年来,随着光网络的研究与发展,越来越多的人们开始追求质量更高、速度更快、性能更好的网络环境,而这也驱使着高容量和高性价比的光纤传输技术的产生。弹性光网络是一种支持频谱灵活应用的新型光网络,它将光谱划分成25GHz,12.5GHz甚至6.25GHz的频隙,并通过频隙的有效组织,以有效提高光纤传输不同业务时的带宽资源利用率,从而降低网络的建设和运营成本。本文针对承载IP业务的弹性光网络,建立了成本优化模型,提出了两种路径分割方案:自适应路径分割和启发式路径分割,并研究采用这两种方案来承载业务时的弹性光网络建设成本。自适应路径分割穷举所有中间节点来选择路径分割点,而启发式路径分割设定合适的分割距离来进行路径分割。通过仿真并与无路径分割情况对比分析,发现:对于中高速业务需求,网络各节点处业务需求增多,路径分割方案通过合理配置具有疏导功能的IP路由器,可以对业务进行有效疏导,从而降低网络的总支出成本。同时本文对基于自适应和基于启发式路径分割方案进行了普适性设计,提出了多重路径分割技术。设计了基于多重自适应路径分割传输方案和基于λ-HMA路径分割传输方案,研究了两种方案在承载信息的弹性光网络建设上对成本的优化情况。通过仿真分析,得出不同方案各自的最佳使用情况。
[Abstract]:In recent years, with the research and development of optical networks, more and more people begin to pursue a higher quality, faster, better performance network environment, which also drives the emergence of high capacity and high cost-effective optical fiber transmission technology. Elastic optical network (EON) is a new type of optical network which supports the flexible application of spectrum. It divides the spectrum into 25 GHz or 12.5 GHz or even 6.25GHz frequency slots, and through the efficient organization of frequency slots, it can effectively improve the bandwidth utilization efficiency of optical fiber when transmitting different services. In order to reduce the network construction and operation costs. In this paper, a cost optimization model is established for elastic optical networks carrying IP services, and two path segmentation schemes are proposed: adaptive path segmentation and heuristic path segmentation. The construction cost of elastic optical network is studied when the two schemes are used to carry the service. Adaptive path segmentation enumerates all the intermediate nodes to select path segmentation points, while heuristic path segmentation sets the appropriate segmentation distance for path segmentation. Through simulation and comparative analysis with no path segmentation, it is found that the demand for service at each node of the network increases for the demand of medium and high speed services, and the path segmentation scheme can reasonably configure IP routers with grooming function. Business can be effectively groomed, thus reducing the total cost of network expenditure. At the same time, the adaptive and heuristic path segmentation schemes are designed in this paper, and the multi-path segmentation technology is proposed. The transmission schemes based on multiplex adaptive path division and 位 -HMA path division are designed, and the cost optimization of the two schemes in the construction of elastic optical network carrying information is studied. Through simulation and analysis, the best use of different schemes is obtained.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.1

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