光突发交换网络中基于波长分集的QoS算法

QoS Algorithms Based on Wavelength Grouping in Optical Burst Switching Networks

光突发交换(OpticalBurstSwitching,OBS)被公认为是构建下一代光网络的有效交换技术。在OBS网络中有效地支持QoS(QualityofService)是一个很重要的问题。该文从波长分集的思想出发,提出了几种适合OBS的QoS算法。这些算法可以根据各个优先级业务的变化情况,动态地调整各个优先级的业务使用的波长数目。通过仿真,并和已有算法相比,说明所提出的算法可以更好地提供区分服务,同时有效提高信道的利用率,降低整体的丢失率。

Optical Burst Switching （OBS） is considered as an efficient switching technique for the next generation optical networks. Q0S （Quality of Service） support is an important issue ill OBS networks. This paper focuses mainly on the QoS algorithms based on wavelength grouping schemes, and proposes several new QoS algorithms. These algorithms can adjust the wavelengths used in each class dynamically, according to the variation of its traffic. Simulation results and comparisons with the existing algorithms show that these algorithms can provide better differentiated service, decrease the burst loss probability and improve the channel utilization.