摘要
基于离线调度方式和节点模块化设计思想,提出一种时延约束节能动态波长带宽分配算法。该算法考虑OLT和ONU两端协同节能,在保证分组时延约束条件下,尽可能减少激活波长数和延长轮询周期长度。同时,尽量集中OLT和ONU端上/下行传输时间,减少其状态转换次数,延长其处于低功耗状态时间,并避免信道出现高能耗空隙。仿真结果表明所提算法在保证分组时延约束的前提下,有利于降低OLT端和ONU端能耗以及全网总能耗。
Based on offline scheduling and node modular design,an energy-efficient dynamic wavelength and bandwidth allocation algorithm with the delay constraint(EE-DWBA-DC)was proposed.Optical line terminal(OLT)and optical network units(ONU)were considered to save energy.Under the constraint of packet delay,the number of active wavelengths could be reduced as much as possible and the length of polling cycle was increased.At the same time,the uplink and downlink transmission time of OLT and ONU were concentrated to reduce the state conversion times and extend its low-power duration.In addition,the high energy consumption voids of channels were attempted to be minimized.The simulation results verify that the proposed algorithm can reduce the energy consumption of OLT and ONU and the total energy consumption of the whole network under the premise of guaranteeing packet delay constraints.
作者
于存谦
唐明珠
何荣希
YU Cunqian;TANG Mingzhu;HE Rongxi(College of Information Science and Technology,Dalian Maritime University,Dalian 116026,China)
出处
《通信学报》
EI
CSCD
北大核心
2018年第9期110-121,共12页
Journal on Communications
基金
国家自然科学基金资助项目(No.61371091
No.61801074)
大连海事大学"十三五"重点科研基金资助项目(No.3132016318)
中央高校基本科研业务费专项基金资助项目(No.3132017078)~~
关键词
无源光网络
时分波分复用
动态波长带宽分配
节能
时延约束
passive optical network
time and wavelength division multiplexing
dynamic wavelength and bandwidth allocation,energy saving
delay constraint
