一种基于OLT缓存的节能策略

Energy saving policy based on OLT cache

为了降低日益增长的接入网能耗,研究了无源光网络(PON)系统中的节能技术,在传统节能策略的基础上,提出了一种基于OLT缓存的节能策略。该方法通过在OLT侧设置一个缓存器,缓存来自核心网的下行数据业务,根据下行数据业务的大小是否超过预设的门限值来判定是否向相应的ONU发送下行数据。理论分析和仿真实验表明:相对传统无节能方案,该方案可以节能75%,且在下行链路负载较低时,下行分组平均时延有明显改善。

In order to reduce the growing energy consumption of the access network, this paper mainly studies the energy-saving technologies in passive optical network （PON） systems. Based on traditional energy-saving strategies, an energy-saving strategy based on OLT cache is proposed. In the method, a cache is set on the OLT side to buffer the downlink data service from the core network, and it is determined whether to send downlink data to the corresponding ONU according to whether the size of the downlink data service exceeds a preset threshold. Theoretical analysis and simulation experiments show that this scheme can save 75% energy compared to the traditional non-energy-saving scheme. When the downlink load is low, the average delay of downlink packets is significantly improved compared to the traditional energy-saving scheme.