一种基于时序调度的配用电通信网流量控制方法

An Traffic Control Method Based on Timing Scheduling for Distribution and Consumption Communication Networks

摘要: 在以太网无源光网络(EPON)中，某些业务数据流的突发，会在ONU产生大量的缓存占用。为了在高质量转发来自用户终端设备CPE (Customer Premise Equipment)的数据至OLT的前提下，降低ONU的缓冲区占用率，本文提出了一种流量控制方法，将CPE置于PON OLT的控制之下，对CPE上行数据流量进行调度与控制。ONU按照策略所述的CPE传输顺序，沿着PON上行信道依次发送CPE数据至OLT。同时ONU按照策略所述的可以开始向OLT传输的最早时刻，对CPE数据进行转发。仿真表明，该流量控制策略在保证合理丢包率的情况下，大大降低了ONU的缓冲器容量，优化了传输效果。

Abstract: In the Ethernet Passive Optical Network (EPON), the traffic burst of some kind of services will result in lots of cache occupy in ONU. In order to reduce cache occupy with forwarding the data flow coming from CPE (Customer Premise Equipment) to OLT with high QoS, a traffic control strategy is proposed in this article. The strategy can control the CPEs by the use of PON OLT and schedule the upstream flow from CPE. According to the strategy, the ONU forwards the data in a certain order. According to the strategy, the ONU forwards the data at a certain time point. In the light of simulation results, this traffic control strategy can greatly reduce cache’s occupation in ONU and can also guarantee the packet loss which optimizes the transmission quality.