Congestion control mechanism in Delay Tolerant Networks

Delay Tolerant Network (DTN) shows some features like link frequent interruptions, long delays, limited resources and so on, while nodes fight each other to win the network resources in the process of communication, which can lead to network congestion in delay tolerant network. Therefore, congestion control is a key issue in delay tolerant network research. The present congestion control strategies are divided into congestion detection, congestion avoidance, congestion handling. In this paper, we qualitatively analyze and compare typical congestion control strategies have been proposed, which are based on the analysis of the basic characteristics of the delay tolerant network. Through the analysis of the advantages and disadvantages of each mechanism, we conducted further research and discovery. Finally, we make a conclusion and propose congestion control technology and the energy constraint balance strategy.