摘要
随着网络中业务量的增加,OBS(optical burst switching)网络的核心节点进行交换的端口数增多,交换矩阵规模增大,节点成本增加。为了减小交换矩阵的规模并降低节点成本,将波带思想引入光突发交换中,设计了支持波长突发和波带突发交换的OBS网络节点结构,并提出了支持波长突发和波带突发的汇聚算法和信道调度算法。仿真分析了端口数目及波带粒度对网络性能的影响。仿真结果表明,在满足一定丢包率要求下,可以通过选择合适的端口比和波带粒度来减少交换矩阵端口数目,降低节点成本。
With the increasing of traffic in the networks,the switching port number and the switching matrix scale,as well as the cost in the core nodes,are growing.In order to reduce the switching matrix scale and the node cost,the waveband switching idea is introduced to the OBS（optical burst switching） networks.New architectures of OBS network nodes are designed to support wavelength burst and waveband burst switching in the paper.An assembly algorithm and a channel scheduling algorithm are proposed for the OBS networks to support wavelength burst and waveband burst.The simulation analyses the impact of the number of ports and waveband granularity on the performance of the OBS network.The simulation results show that under the condition of a certain packet loss probability of propose architectures and algorithms could decrease the switching port number and reduce the cost of nodes through the appropriate proportion of ports and waveband granularity.
出处
《重庆邮电大学学报（自然科学版）》
北大核心
2012年第2期138-143,共6页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
国家自然科学基金项目(61071117
61171158)
四川省青年基金(09ZQ026-032)
重庆市科委项目(CSTC
2009BB2285
CSTC
2008BB2414
CSTC
2010BB2413
CSTC
2010BB2409
CSTC
2010BB2413)
重庆市教委项目(KJ080513
KJ080522
KJ110519
KJ110527)~~
关键词
光突发交换网络
多粒度光交换
波带突发
汇聚算法
信道调度算法
optical burst switching networks
multi-granularity optical switching
waveband burst
assembly algorithm
channel scheduling algorithm
