光突发交换网络中QoS机制研究与实现

The Research and Implementation of QoS Scheme in Optical Burst Switching Networks

光突发交换作为下一代光互联网最有前途的解决方案已经越来越受到人们的关注,如何增强光突发交换网络的服务质量(QoS)保障能力,已成为光交换领域内的一个重要研究课题。论文对光突发交换网络中基于偏置时间的QoS机制进行了研究,采用低优先级直接丢弃算法,结合突发分片技术和最近可用信道-空隙填充算法,提出了一种新的QoS解决方案,通过建立相应的光突发交换网络模型对该解决方案进行了仿真比较,仿真结果表明该方案可以明显地降低阻塞率,提高信道利用率,为各类业务提供良好的QoS保障。

Optical Burst Switching（OBS） networks have been receiving much attention as a promising approach to build the next generation optical Internet.How to improve quality of service（QoS） in OBS networks has become a very important research issue in the areas of optical transport network.This paper carries out some researches on the offset-time-based QoS scheme in OBS networks,and puts forward a new synthetic solution for supporting QoS based on the Low Priority Burst Dropping Directly theory.This synthetic solution consists of the Burst Segmentation technique and Latest Available Unused Channel with Void Filling （LAUC-VF） scheduling algorithms.In order to evaluate the effectivity of the synthetic solution when it is applied to an optical burst switching network,an analysis model has been established.The results of simulation and performance evaluation have been shown that the new synthetic solution can be very efficient in QoS guarantee.