LR-PON中基于空闲填充的部分多线程轮询算法

摘要

针对长距离无源光网络(LR-PON)中不同ONU到OLT的传播时延差异较大的特点,提出一种基于空闲填充的部分多线程轮询算法(VF-PMTP).该算法中,OLT对长距离ONU采用在线调度和离线调度相结合的混合调度方式,并根据信道的空闲情况动态调整长距离ONU的授权次数.%A void-filling based partial multi-thread polling algorithm (VF-PMTP) has been proposed for long reach passive optical networks (LR-PON) with heterogeneous propagation delays.In VF-PMTP algorithm,OLT works on a combined online and offline scheduling scheme for the coexisting long-distance ONUs.Besides,VF-PMTP algorithm can adjust the grant times of the coexisting long-distance ONUs depending on whether the channel is idle.