灵活栅格光网络中的资源优化技术研究设计说明书.docxVIP

XXX(设计) PAGE PAGE 1 灵活栅格光网络中的资源优化技术研究 摘要 随着宽带业务和互联网的飞速发展，特别是现在4G移动网络的兴起，作为数据传送主力的光网络面临着更大的挑战。扩大容量与增加灵活性成为当今光网络研究的主要趋势。传统光网络WDM（Wavelength Division Multiplex）的频谱资源分配方式是基于固定栅格的，由于固定栅格的限制使得光网络渐渐在高宽带，高灵活，低延时方面不能满足人们的需求了。应运而生的灵活栅格的光网络成为现在数据光网络研究的热点问题。灵活栅格光网络的出现在帮助频谱资源更灵活应用的同时也伴随着频谱资源碎片的问题。因此，频谱资源优化技术研究成为当务之急。 本文首先对频谱碎片的产生机制以及现有的主要解决办法进行了分析与讨论,在已有的研究基础上提出来一种新的基于业务感知的频谱碎片评估方案，实现可以对网络中的碎片程度进行量化表现。然后以其为基础设计了一种新的基于频谱碎片感知的路由频谱分配算法。最后，在实验平台上设计并验证了该算法，并对所得结果进行分析，仿真结果显示本文所提出的算法能够一定程度解决频谱碎片问题。 关键词：灵活栅格光网络，路由与频谱分配，碎片评估 Research On Resource Optimization Technology in Flexible Grid Optical Networks abstract With the rapid development of broadband services, the Internet, especially the rise of modern 4G mobile networks, optical network as the data transmission network is facing a bigger challenge. To expand the capacity and be more flexibility has become a major trend in todays optical networking research. Traditional WDM (Wavelength Division Multiplex) optical network ,who’s spectrum resource allocation method is based on a fixed grid, as a result of the limitation of the flexible grid optical network gradually cant satisfy peoples needs in high broadband, more flexibility and low latency ways.Arises at the historic moment, optical networks with flexible grid become a hot issue in the research on optical network. Although the appearance of flexible grid optical network is helpful in making spectrum resources application be more flexible,at the same time ,its also associated with a problem in spectrum fragments. Therefore, the research about spectrum optimization technique is becoming the urgent matter. Firstly, this paper introduces the key cause and terms of settlement in resource fragmentation, we present a traffic aware fragment degree method for evaluate the fragment degree of the network.Then by using the new fragment degree research we proposed a new routing and spectrum allocation which can help us reduce the degree of spectrum program when we set up a new ligh