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Spectral resource defragmentation based on PCE in flexible bandwidth optical networks

ISSN号：1005-8885
期刊名称：《中国邮电高校学报：英文版》
时间：0
分类：TN92[电子电信—通信与信息系统;电子电信—信息与通信工程] TN761[电子电信—电路与系统]
作者机构：[1]State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
相关基金：This work was supported by the National Bascic Research Program of China （2010CB328204）, the National Natural Science Foundation of China （60932004）, the Hi-Tech Research and Development Program of China （2009AA01Z255）, RFDP Project （20090005110013）, and the Fundamental Research Funds for the Central Universities （2011 RC0406）.

作者： LIN Qun ZHAO Yong-li CAO Xu-ping YU Xiao-song TANG Ting-ting ZHANG Jie[1]

关键词：频谱资源, 带宽有效, 碎片整理, 光网络, PCE, 大容量传输, 网络阻塞率, 高频谱效率, flexible bandwidth optical network, PCE framework, spectral fragmentation, spectral resource defragmentation

中文摘要：

光网络是的灵活带宽的颗粒度光谱槽，它比波长的小得多切换光网络。因为动态顾客是连接安装并且撕下进程，它将产生破碎光谱资源。它是在为导致破碎的新连接发现 suficient 连续光谱的概率的衰落光谱资源。更特定，这些系列可能是无法获得的并且废物。在这种情况中，光谱的严重浪费将导致低效率在光谱利用和愿望以后不适应传播的大能力要求。因为路径计算元素(PCE ) 框架有中央处理的特征和光谱资源的推广，我们构造光谱资源分配情形基于在灵活带宽的 PCE 框架有效地使用光谱资源的光网络。基于破碎的产生的原则，我们提出了一个光谱资源碎片整理算法为顾客的连接巩固可得到的光谱。模拟结果显示这个算法能减少网络的破碎，改进连续性光谱资源，在网络减少服务的堵住的率并且改善光谱效率显著地。

英文摘要：

The granularity of the flexible bandwidth optical network is the spectral slots, which is much smaller than that of the wavelength switch optical network. For the dynamic clients＇ connections setup and tear down processes, it will give rise to fragmentation of spectral resources. It is the decline in the probability of finding sufficient contiguous spectrum for new connections that result in the fragmentation of spectral resource. To be more specific, these spectra may be unavailable and waste. In this case, the severe waste of the spectrum will lead to low efficiency in spectral utilization and will not adapt to large capacity requirements of transmission in the future. Because path computation element （PCE） framework has the characteristics of the central disposal and deployment of the spectrum resource, we construct the spectral resource allocation scenario based on PCE framework in the flexible bandwidth optical network to use spectrum resource effectively Based on the principle of the generation of the fragmentation, we put forward a spectrum resource defragmentation algorithm to consolidate the available spectrum for clients＇ connections. The simulation results indicate that this algorithm is able to reduce fragmentation of network, improve the continuity of spectral resource, reduce the blocking rate of services in the network and improve the spectral efficiency significantly.