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分析了光弹性分组环(ORPR)网络中流量成型时光分组组装算法,提出一种适合ORPR网络的基于控制发送时间的光分组组装算法,并给出了该算法的算法结构。该算法在混合门限组装算法的基础上,通过增加一个控制分组发送间隔的参数,使得光分组单位时间内流量的突发性被平滑,并可以保证ORPR网络的服务质量(QoS)性能,适合于使用容量有限光缓存的ORPR网络。对ORPR节点光分组平均组装时延进行了详细的分析,新算法通过对分组发送间隔的调整,使在不同负载条件下,组装时延的概率分布基本相同。在ORPR中,平均组装时延的稳定对ORPR网络的QoS性能和公平性调度有重要意义,而发送时机的合理选择,可以保证ORPR网络的QoS性能以及公平性。仿真结果表明,新算法使得ORPR网络中的光分组平均组装时延相对稳定,在大多数情况下,可以保证ORPR网络的调度要求。
The packet assembling algorithm of traffic shaping in the photoelastic packet ring (ORPR) network is analyzed. An optical packet assembly algorithm based on the control sending time suitable for the ORPR network is proposed and the algorithm structure of the algorithm is given. Based on the hybrid threshold assembly algorithm, the algorithm adds a parameter to control the interval of sending packets, so that the burst of traffic per unit time of the optical packet is smoothed and the quality of service (QoS) performance of the ORPR network can be guaranteed. ORPR network using limited optical light buffer. The average assembly delay of optical packet in ORPR node is analyzed in detail. The new algorithm adjusts the packet sending interval so that the probability distribution of assembly delay is basically the same under different load conditions. In ORPR, the stability of the average assembly delay is of great significance to the QoS performance and fairness scheduling of the ORPR network, and the reasonable choice of the sending timing can ensure the QoS performance and fairness of the ORPR network. The simulation results show that the new algorithm can make the average assembly delay of optical packets in ORPR network relatively stable, and in most cases, the scheduling requirements of ORPR network can be guaranteed.