光突发交换网络中Jitter-EDF调度算法的研究

提出了一种应用于OBS网络中的Jitter-EDF调度算法来减小时延抖动对实时性突发QoS的影响，设计了基于该算法的OBS网络中核心路由器的主要结构，讨论了此算法实现的可能性，并推导出端到端时延的上下限和时延抖动的上限，最后结合具体网络拓扑进行了仿真和分析。结果表明，Jitter-EDF调度算法能够将时延抖动的幅度平均降低到30%～40％，有效保证了实时性应用对时延抖动的要求。

Jitter-EDF Scheduling Algorithm in Optical Burst Swithing Networks

We propose a Jitter-EDF scheduling algorithm which is applied into OBS network to reduce the effect of delay jitter on real-time bursts. Based on this algorithm, we depict some main modules of optical core routers in OBS network. We also discuss the implement possibility of the algorithm and derive the upper bound and lower bound of end-to-end delay and the upper bound of delay jitter. Finally, we simulate the algorithm in practical network topology. Numerical results show that Jitter-EDF scheduling algorithm can strictly guarantee the requirements of delay jitter for real-time applications.