带有上行数据帧聚合的光无线融合接入网络节能机制

摘要

光无线融合接入网存在光网络单元利用率低,数据传输过程中控制开销较大的问题.该文提出一种带有上行数据帧聚合的节能机制,建立M/G/1模型分析数据帧在无线域节点及光域节点的队列时延,结合不同优先级业务的最大容忍时延,推导各优先级聚合帧在不同网络状态下的最佳长度,进而根据所得到的最佳帧长对光域节点进行休眠调度,在保障业务时延的前提下,尽可能地延长节点休眠时间长度,提高网络能量效率.仿真结果表明,所提方法在有效降低整个网络能耗的同时能够保证业务的时延性能.%Integrated Fiber-Wireless (FiWi) access network has the problems of low utilization rate of optical network unit and large control overhead during data transmission.In this paper,an energy saving mechanism with uplink data frame aggregation is proposed,the M/G/1 model is used to analyze the queue delay of the data frame in the wireless domain node and the optical domain node,by combining with the maximum tolerable delay of different priority,the optimal length of the aggregation frame is deduced in different network conditions.And then according to the optimal frame length to perform sleep scheduling for optical domain nodes,on the premise of guaranteeing the service delay,as much as possible to extend the length of node sleep time,and then the network energy efficiency is improved.The simulation results show that the proposed method can effectively reduce the energy consumption of the whole network and guarantee the delay performance.