基于弹性光网络的网络保护技术的相关研究

发布时间：2019-02-22 11:30

【摘要】：随着网络需求的不断增加，传统的波分复用（WDM）光网络已经不能满足现有大容量的传输需求。弹性光网络由于其灵活的频谱带宽分配能力和较高的频谱利用率受到高度关注。同时网络保护一直是光通信领域的研究热点。以这些问题为出发点，本文将重点研究基于弹性光网的一些关键网络保护技术。首先，研究基于弹性光网络的链路恢复（Span Restoration）技术。将考虑三种不同的频谱转换能力，并根据每一种频谱转换能力创建相应的整数线性规划（ILP）优化模型。其次，研究弹性光网中的共享备用路径保护（SBPP）与1+1保护技术。针对每一种保护技术和不同的光发射器频谱可调能力进行数学建模分析。最后，针对弹性光网的环保护与P圈保护技术，分别建模分析。此外，，还将带宽压缩恢复（BSR）技术应用到了上述保护技术中。主要结果表明，（1）良好的频谱转换能力能显著提高备用频谱资源的利用率；（2）SBPP比1+1保护技术具有更高的备用频谱资源利用率，而光发射器频谱可调能力也能很好地提高网络频谱利用率；（3）P圈保护技术在频谱利用率上大大地优于环保护技术；（4）带宽压缩恢复（BSR）技术在有效压缩所需网络频谱资源情况下能很好地保证网络业务的恢复率。
[Abstract]:With the increasing demand of the network, the traditional WDM (WDM) optical network can not meet the needs of large capacity transmission. Elastic optical networks (EON) have attracted much attention due to their flexible bandwidth allocation and high spectral efficiency. At the same time, network protection has been a hot spot in the field of optical communication. With these problems as the starting point, this paper will focus on some key network protection technologies based on elastic optical network. Firstly, the link recovery (Span Restoration) technology based on elastic optical network is studied. Three different spectral conversion capabilities will be considered and corresponding integer linear programming (ILP) optimization models will be created according to each spectrum conversion capability. Secondly, the shared standby path protection (SBPP) and 11 1 protection techniques in elastic optical networks are studied. The mathematical modeling and analysis of each protection technology and different spectral tunability of optical transmitters are carried out. Finally, the ring protection and P ring protection technology of elastic optical network are modeled and analyzed respectively. In addition, the bandwidth compression recovery (BSR) technology is applied to the above protection technology. The main results are as follows: (1) A good spectrum conversion capability can significantly improve the utilization ratio of the spare spectrum resources; (2) SBPP has higher spectral resource efficiency than 1-1 protection technology, and the spectrum tunable ability of optical transmitter can also improve the spectrum efficiency of the network. (3) P-loop protection technology is much better than ring protection technology in spectrum efficiency; (4) bandwidth compression recovery (BSR) technology can effectively compress the required network spectrum resources to ensure the recovery rate of network services.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.1

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