论文部分内容阅读
针对稀疏分布有限波长转换能力的光突发交换(SWCC-OBS)网络容易出现的高丢包率和负载不均衡问题,建立了稀疏分布OBS全网丢包率的数学模型。为了克服模型求解过程中多变量带来的非线性问题,对影响全网突发丢包率的参变量进行分解预估和反馈更新,求得全网对应业务流模型下的优化路由路径,获得了全网突发数据的近似最低丢包率。仿真实验表明,在SWCCOBS网络中,本文提出的路由选择模型及分解协调的路由选择算法,不仅能有效地避免突发数据包间的相互冲突、降低了全网丢包率,而且能很好地适应突发数据业务的动态变化,保证了网络的负载均衡和较低的丢包率。
Aiming at the problems of high packet loss rate and unbalanced load in optical burst switching (SWCC-OBS) networks with sparsely distributed and limited wavelength conversion capability, a mathematic model of sparsely distributed OBS packet loss rate is established. In order to overcome the nonlinear problem caused by multivariable in the model solving process, the parameters affecting the burst loss rate of the entire network are decomposed and estimated and fed back, and the optimal routing path under the whole network corresponding to the traffic flow model is obtained. The whole network burst data approximate minimum packet loss rate. Simulation results show that in SWCCOBS network, the proposed routing model and the coordinated routing algorithm can not only effectively avoid the conflict between burst data packets, but also reduce the packet loss rate in the entire network and can adapt well The dynamic changes of burst data service ensure the network load balancing and lower packet loss rate.