支持OTDM的多粒度光交换结构研究  

Architecture of OTDM-enabled Multi-granularity Optical Switching

作　　者：余明辉 李玲霞 何顺 

机构地区：[1]重庆邮电大学光互联网及无线信息网络研究中心,重庆40006

出　　处：《通信技术》2008年第8期126-128,共3页Communications Technology

基　　金：重庆邮电大学青年基金项目(A2007-16)

摘　　要：多粒度光交换能减小光交叉连接矩阵的规模,降低光节点的成本,然而现有多粒度光交换结构的最小交换粒度常为波长,该交换粒度太大,会导致核心节点的链路利用率低。文章在多层MG-OXC基础上,提出了一种新型多粒度交换结构,实现了波带交换和OTDM的结合。该新型MG-OXC结构端口较少,并且可以提高传输速率,同时也因此降低了同等信息量下波长的使用数量,为网络提供了更大的传输容量,能够很好地适应光网络发展的需要。Multi-granularity optical switching can reduce the size of optical cross connect and the cost of optical nodes. However, its smallest switching granularity, often the wavelength, is too big for some traffic, and this would induce the low link utilization. Based on the architecture of multi-granularity optical switching, this paper propose a novel MG-OXC architecture combining WBS and OTDM. The novel MG-OXC architecture has fewer ports, could improve the transmission speed of the networks and use less number of wavelengths in the same case of information traffic, and it can provide much larger transmission capacity too. Thus, it can meet the development requirement of optical networks.

关 键 词：多粒度光交换 波带 光时分复用 

分 类 号：TN915[电子电信—通信与信息系统]