弹性光网络中基于虚级联技术的路由与频谱分配的研究

发布时间：2018-01-01 23:22

本文关键词：弹性光网络中基于虚级联技术的路由与频谱分配的研究　出处：《苏州大学》2015年硕士论文　论文类型：学位论文

【摘要】：由于互联网流量的迅速增长,如何提高光传输网络的容量以应对流量快速增长的需求已成为一个重要研究课题。由于光正交频分复用技术相比于传统的波分复用技术具有更高的频谱效率、更强的损伤容忍度,它已被认为将成为下一代光网络的核心传输技术之一。基于正交频分复用传输技术的光网络称为弹性光网络。对于此类网络的路由与频谱分配问题已被广泛研究,但是这些研究主要是基于单路径光通道的建立。在本论文中,我们采用多路径子频带虚级联(VCAT)技术对弹性光网络进行路由与频谱分配(RSA)。该技术允许一条光通道的频谱分成多个子频带在不同的路径上传输,然后再接收端将这些子频带组合复原成原来光通道频谱。针对基于VCAT技术的RSA问题,我们提出整数线性规划(ILP)优化模型,评估VCAT技术相对于无VCAT技术对提高网络频谱资源利用率的优势。另外,对于VCAT技术,我们还从四个方面考虑了其实际应用限制,包括相邻频带间的预留的频谱保护带,虚级联技术子频带路径的最大距离差限制,各个组成光通道的子频带间的最大带宽差,以及如何利用该技术支持从传统波分复用网络向弹性光网络逐渐演变的问题。通过仿真研究表明,采用VCAT技术能有效地提高弹性光网络的频谱效率。
[Abstract]:Due to the rapid growth of Internet traffic, how to improve the optical transmission network capacity to cope with the rapid growth of traffic demand has become an important research topic. Because the optical orthogonal frequency division multiplexing technology compared to the traditional WDM technology has higher spectrum efficiency, stronger damage tolerance, it has been regarded as one of the core transmission technology of the next generation optical network optical network. Orthogonal frequency division multiplexing technology called elastic optical network. Based on the routing and spectrum allocation problem of the network has been widely studied, but the study is to establish a single path based on optical channel. In this paper, we use multipath sub bands virtual concatenation (VCAT) routing and spectrum allocation of flexible optical network technology (RSA) spectrum. This technique allows a light channel into a plurality of sub bands in different transmission paths, and then The receiving end of these sub band combinations to recover the original optical channel spectrum. To solve the problem of RSA based on VCAT technology, we propose an integer linear programming (ILP) optimization model, evaluation of VCAT technology VCAT technology to improve the utilization rate of the advantages of the network spectrum resources. In addition, the VCAT technology, we also consider from four aspects to limit its practical application, including the reserved protection zone between the adjacent band spectrum, the maximum distance of virtual concatenation technology sub band path difference, each part of the maximum bandwidth of the optical channel sub band difference between, and how to use the technical support from the traditional WDM network gradually evolved to flexible optical network through simulation. Research shows that using VCAT technology can effectively improve the spectral efficiency of flexible optical network.

【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN929.1

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