摘要
针对光突发交换(OBS)网络中如何高效解决频繁发生的光突发竞争问题,提出了一种支持业务均衡的OBS自适应多可达性路由机制(AMR-LB)。首先根据发送端发送业务量大小和当前网络业务承载状态,按需地为光突发确定多可达性路由;然后在非线性规划下,自适应地调整各条路由的业务承载比例。通过性能仿真,并与自适应替代路由算法(AARA)等典型机制比较,AMR-LB在突发丢失率和带宽利用率都得到明显改善,分别约20%和10%。仿真结果表明,该机制不仅可以有效地降低全网丢包率,而且还可以提高网络带宽资源的利用率。
In optical burst switching（OBS） networks,to efficiently resolve the often occurring burst contention,one scheme,adaptive multi-reachability routing with load balancing（AMR-LB）,is proposed,which consists of on-demand multi-reachability routing and network-wide adaptive load distribution.Firstly,the scheme decided the on-demand multi-reachability paths for every traffic flow according to its input load and current network traffic loading status.Then,it adaptively adjusted the distribution proportions for every traffic flow within its multi-reachability paths based on nonlinear programming.Finally,compared with some classical mechanisms,e.g.,adaptive alternate routing algorithm（AARA）,by numerical simulations,the results show that AMR-LB can not only effectively reduce the burst dropping probability but also improve the bandwidth utilization,whose improvements are about 20% and 10%,respectively.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2011年第6期853-857,共5页
Journal of Optoelectronics·Laser
基金
国家"973"资助项目(2007CB310706)
国家自然科学基金资助项目(60725104
60873263)
国家"863"计划资助项目(2009AA01Z215
2009AA01Z254)
四川省青年基金资助项目(09ZQ026-032)
教育部新世纪优秀人才计划资助项目
关键词
光突发交换(OBS)
业务均衡
多可达性路由
突发丢失率
optical burst switching（OBS）
load balancing
multi-reachability routing paths
burst dropping probability
