关键词: 容迟容断网络, 概率策略路由, 主动拥塞控制, 参考概率, 动态调整

Abstract:

To solve the congestion problem at node in delay tolerant networks, an active congestion control strategy based on historical probability was proposed. The strategy put forward the concept of referenced probability that could be adjusted dynamically by the degree of congestion. Referenced probability would control the forwarding conditions to avoid and control the congestion at node. At the same time the utilization of idle resources and the transmission efficiency of the network would be promoted. The simulation results show that the strategy upgrades delivery ratio of the entire network and reduces the load ratio and message loss rate. As a result, the active congestion control is realized and the transmission performance of the network is enhanced.

Key words: Delay Tolerant Network, the probability policy routing, active congestion control, referenced probability, Dynamic adjustment