基于组内ONU处理模式灵活切换的节能OFDM-PON系统网络性能分析

Network Performance Analysis of Energy-efficient OFDM-PON System Based on Flexible Switching of ONU Processing Mode in Group

针对传统的OFDM-PON下行链路中组播组内的多个ONU必须对接收到的本组组播帧进行重复的高耗能解调的现象,提出了一种基于组内ONU处理模式灵活切换的节能OFDM-PON系统。仿真结果表明,当组内互联线速率为1.2Gb/s时,所提出的节能系统在不同组播组成员情况下都可以达到下行平均数据包时延≤1.5ms,丢包率≤3.9%,可以很好地满足宽带视频语音业务下基本的网络性能指标,同时在下行网络负载为0.5时最高可以获得28.8%的ONU端节能效果。

An energy saving OFDM-PON system based on flexible switching of ONU processing mode in group is proposed in this paper.The simulation results show that when the line rate of the inter-links in the group reaches 1.2 Gb/s,the energy-saving system proposed in this paper can achieve the downlink average packet delay ≤1.5 ms and the packet loss rate ≤3.9% under different multicast group members.It can well meet the basic network performance indicators of broadband video voice services,and at the same time can obtain the highest energy saving effect of 28.8% ONU when the downstream traffic load is 0.5.