一种支持业务均衡的OBS自适应多可达性路由机制  

Adaptive multi-reachability routing with load balancing for optical burst switching network

作　　者：严海霞[1,2] 黄琼[1] 阳小龙[2] 隆克平[2] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]电子科技大学光互联网及移动信息网络研究中心,四川成都611731

出　　处：《光电子．激光》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

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.

关 键 词：光突发交换(OBS) 业务均衡 多可达性路由 突发丢失率 

分 类 号：TN915.02[电子电信—通信与信息系统]