弹性光网络中SBPP和频谱碎片重整理技术的研究

发布时间：2018-06-25 23:50

本文选题：弹性光网络 + 频谱窗平面　；参考：《苏州大学》2016年硕士论文

【摘要】：传统波分复用(WDM)光网络由于采用固定频率栅格,导致了带宽资源的严重浪费,已经不能满足不断增长的互联网流量需求。相比于WDM光网络,弹性光网络(EON)具有频谱资源分配灵活和资源利用率高等优点。所以在最近几年,人们越来越关注这种极具发展前景的光网络。本文重点研究了基于距离自适应弹性光网络的共享备份路径保护(SBPP)和频谱碎片重整理技术。首先,我们研究了基于距离自适应SBPP弹性光网络的路由及频谱分配(RSA)问题。为此,提出了基于频谱窗平面(SWP)的RSA算法并建立一个整数线性规划(ILP)模型。仿真结果表明,相比于1+1保护技术和固定路由下的SBPP技术,基于SWP的SBPP算法可以最大化共享保护资源。其次,我们研究了距离自适应弹性光网络中的基于保护光路的无中断频谱碎片重整理,并用SBPP技术验证该机理的优势。为此,我们提出了两种重整理触发机制,即周期重整理(BD)和阻塞触发重整理(BTD)。此外,还提出了适用于这两种触发机制的频谱碎片重整理算法,即整体释放重整理(JR-D)和逐个释放重整理(SR-D)。仿真中,以带宽阻塞率(BBP)和每成功建立一个业务所需的平均光路重构数(ANR)作为网络的主要性能指标。结果表明,相比于没有频谱碎片重整理的情况,我们所提出的机理能够有效地降低BBP,但以ANR为代价。
[Abstract]:Traditional wavelength division multiplexing (WDM) optical networks have been unable to meet the increasing demand for Internet traffic due to the use of fixed frequency grids which lead to a serious waste of bandwidth resources. Compared with WDM optical networks, elastic optical networks (EON) have the advantages of flexible spectrum resource allocation and high resource utilization. So in recent years, people pay more and more attention to this kind of optical network. This paper focuses on the research of shared backup path protection (SBPP) and spectrum defragmentation based on distance adaptive elastic optical networks. Firstly, we study the routing and spectrum allocation (RSA) problem based on distance adaptive SBPP elastic optical networks. In this paper, a spectrum window plane (SWP) based RSA algorithm is proposed and an integer linear programming (ILP) model is established. The simulation results show that the SWP-based SBPP algorithm can maximize the shared protection resources compared with the 11 1 protection technology and the fixed routing SBPP technology. Secondly, we study the uninterrupted spectrum fragment rearrangement based on protected optical path in the distance adaptive elastic optical network, and verify the advantage of the mechanism with SBPP technology. For this reason, we propose two trigger mechanisms for refinishing: periodic refinishing (BD) and blocking triggered refinishing (BTD). In addition, a spectrum defragmentation algorithm suitable for these two trigger mechanisms is proposed, that is, global release refinishing (JR-D) and individual release refinishing (SR-D). In the simulation, the bandwidth blocking rate (BBP) and the average optical path reconfiguration (ANR) for each successful service are taken as the main performance indicators of the network. The results show that the proposed mechanism can reduce BBP effectively, but at the expense of ANR.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.1

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