大容量数据下基于DTN的链路中断优化传输技术

激光或GHz以上的高频链路的应用将导致DTN(Delay Tolerant Network)网络链路数据容量的增大,大容量数据链路的间歇性中断将严重影响数据的传输效率。针对DTN网络中大容量数据链路频繁中断和节点的剩余缓存空间剧烈变化的问题,提出在DTN路由算法上增加拥塞状态预测机制和易中断链路判定机制,根据节点的拥塞程度定义惩罚函数,缓解链路中断和节点资源受限导致的拥塞。仿真结果表明,该机制可以有效提高DTN网络的传输性能。

Transmission Optimization Technology of Link Interrupt Based on DTN Network with Large Capacity Data

The link of the high-frequency above GHz or laser will lead to the data capacity increases of the link over DTN (Delay Tolerant Network),and the intermittent interruption of large-capacity data link will affect the data transmission efficiency seriously.To cope with the problems of that large-capacity data link occur interruption frequently and the remaining buffer space of nodes changes acutely,the congestion prediction mechanism and the interrupted node determination mechanism are added to DTN routing algorithms,and define the penalty function by the congestion degree and the result of the determination to relieve the congestion caused by link interruption. Simulation results show that this mechanism can improve the transmission performance of DTN network effectively.