光分组交换节点结构及性能研究  

Architectures and performance of optical packet switching nodes

作　　者：李玲香[1] 李季碧[1] 姜涛 赵春辉 

机构地区：[1]重庆邮电学院,重庆400065 [2]新疆自治区电信有限公司巴州分公司,乌鲁木齐830007

出　　处：《重庆邮电学院学报（自然科学版）》2006年第2期183-186,共4页Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)

基　　金：重庆市教委基金项目(No.040502;No.040504;KJ050504);重庆市科委基金资助(No.2005BB2066)

摘　　要：为了适应接入带宽IP新业务越来越高的容量要求,传输网试图提供一种可重置的光层来获得WDM信道的快速动态分配,提出了一种新的光分组交换系统,能更好地实现资源统计分配,使带宽充分得到利用。交换节点是分组交换系统的核心部件,交换节点的结构流量性能直接影响交换系统性能。针对光分组交换网络提出了一种新的交换节点结构,通过计算机仿真说明,采用这种节点结构比采用其他节点结构在不同的负载情况下,其流量性能得到了改善,降低了丢包率和平均迟延。As new bandwidth-hungry Internet protocol （IP） services are demanding more and more capacity, transport networks are evolving to provide a reconfigurable optical layer in order to allow fast dynamic allocation of wavelength-division-multiplexing （WDM） channels. To achieve this goal, optical packet-switched systems seem to be strong candidates as they allow a high degree of statistical resource sharing, which leads to an efficient bandwidth utilization. In this paper, we propose an architecture for optical packet-switched transport networks, together with an innovative switching node structure based on the concept of per-packet wavelength routing. The traffic performance of such node is evaluated better than other similar architectures through computer simulation ; packet loss probability and average delay performance are shown for various load conditions.

关 键 词：波导光栅阵列 光分组交换 密集波分复用 丢包率 

分 类 号：TN915.04[电子电信—通信与信息系统]