无源光网络中可延长睡眠周期循环睡眠模式的性能分析

Performance Analysison Cyclic Sleep Mode with Extended Sleep Periods in Passive Optical Networks

随着宽带用户数的急剧增加,通信网络的能耗问题引起了广泛关注。针对光网络单元(ONU),建立了循环睡眠模式的Markov链数学模型,设计了4种睡眠周期的变化模式,研究了延长睡眠周期对节能效率和数据包延迟的影响。仿真结果表明当ONU的睡眠意识-睡眠(Sa S)状态对个数n大于5时,节能效率和数据包延迟达到饱和;当n为较小值时,Cost可得到最优值。

With the rapid increase of the broadband users,the energy consumption of communication networks has an aroused wide concern.The mathematical model of Markov chain was established for the ONU(Optical Network Unit),and four kinds of sleep cycles were designed.The effects of extended sleep cycle on the energy efficiency and the packet delay were studied.The simulation results show that when the SaS state pair of ONU is greater than 5,the energy efficiency and packet delay are saturated,and the optimal value of Cost can be obtained when n is small.