下一代无源光网络(NG-PON2)中的带宽分配问题是研究的热点之一。针对在网络动态环境中如何根据网络的变化状态合理分配带宽资源的问题, 提出了一种具有自适应能力、基于统计的周期性服务质量(SPSQ)的动态带宽分配算法, 结合网络资源周期性需求的特点, 采用统计的方法对无源光网络中的动态带宽分配问题进行分析。仿真结果表明, 该算法能够在传输业务量变化时, 适应网络的数据传输情况并提升网络服务质量。

The bandwidth allocation problem in the next generation passive optical network(NG-PON2) is one of the research hotspots. Aiming at the problem of how to reasonably allocate bandwidth resources according to the changing state of the network in the dynamic network environment, a dynamic bandwidth allocation algorithm based on statistical periodic quality of service(SPSQ) with adaptive ability is proposed. Combined with the characteristics of the periodic demand of network resources, the dynamic bandwidth allocation problem in passive optical networks is analyzed by statistical method. The simulation results show that the algorithm can adapt to the data transmission of the network and improve the quality of service of the network when the traffic changes.