新的支持ONU睡眠模式的时隙管理方案

New slot management scheme supporting ONU sleep mode

针对光网络单元(ONU)的节能问题,提出了一种新的基于轮询周期的时隙管理方案。本方案以轮询周期为带宽分配单元,在每个轮询周期的开始为各ONU分配收/发时隙,并将时隙分配信息通过修改过的GATE帧广播至所有ONU中,各ONU接收GATE帧并提取各自的收/发时隙分配信息,在本轮询周期分配的时隙内接收/发送数据,在无收发任务的时间内进入低耗能的睡眠状态。理论分析和数值仿真计算表明,采用本方案的ONU,其能耗仅为普通ONU能耗的11%,而引入的下行分组延时不超过2ms,下行平均队列长度在2Mbit以内。

Aimed at the problem of optical network units （ONU） energy saving, a new based on the polling cycle time slot management scheme was proposed. In this scheme, polling cycle was a bandwidth allocation unit, and the transceiver time slots for each ONU were assigned at the beginning of each polling cycle, then the slot allocation information was broadcasted to each ONU through a modified GATE frame. Each ONU received the GATE frame, and extracted its own slot allocation information, and thus received or transmitted data within the allocated time slots in the polling cycle. When there was no need for receiving or transmitting data, the ONU would go into sleep mode with low energy con- sumption. Theoretical analysis and numerical simulation calculations show that the ONU with new time slot management scheme is only t1% of the energy consumption of the ordinary ONU, While the introduction of the downlink packet de- lay don＇t exceed 2ms, and downlink average queue length is less than 2Mbit.