摘要
针对卫星DTN网络采用保管传输引起节点拥塞和流量过载的链路拥塞问题,文章提出一种区分链路拥塞和节点拥塞的控制算法(DLNC)。DLNC根据节点空闲比,判断链路流量是否过载,若是链路中断,则通过连通图判断是否发生拥塞;根据信息、节点的因素判断节点是否发生拥塞;若拥塞则通过该概率图查找保管节点来缓解拥塞。仿真结果表明,相比已有的拥塞控制算法,DLNC大大降低了丢包率,提高了数据投递率,在延时和开销方面也表现出了较好的性能。
In order to solve the problem of link congestion caused by node congestion and traffic overload in satellite DTN network,a control algorithm（DLNC）is proposed to distinguish link congestion and node congestion.DLNC determines whether the link traffic is overloaded according to the idle ratio of the nodes.If the link is interrupted,the congestion is judged by a connected graph.According to the factors of information and node,we can judge whether the node is congested or not.If congestion is detected,we can find the storage nodes through this probability graph to alleviate congestion.The simulation results show that,compared with the existing congestion control algorithms,DLNC greatly reduces the packet loss rate,improves the rate of data delivery,and shows good performance in time delay and overhead.
作者
李静森
LI Jingsen(Taiyuan University,Taiyuan 030032,China)
出处
《太原学院学报（自然科学版）》
2018年第3期40-44,共5页
Journal of TaiYuan University:Natural Science Edition
基金
国家自然科学基金(62301151)
关键词
卫星DTN网络
保管传输
链路拥塞
节点拥塞
satellite DTN networks
custody transfer
link congestion
node congestion
