A DTN Congestion Control Method based on Node Store Status

摘要

DTN enhances message transmission success rate and reduces message forwarding delay by increasing the number of message copies. However, a large number of redundant copies will cause nodes to be congested, which decreases the resource utilization rate of networks, resulting in low overall network performance. To address this issue, we propose a congestion control method NSS-CC, which is based on node storage status. According to the storage space utilization rate of nodes, the storage status is categorized into three states: Normal, Semi-Congested, and Congested. The node adjusts its own congestion control mechanism according to its own congestion state, in order to balance the load of the node effectively, and judges whether to receive the message by defining the Degree of Willingness (DoW). The simulation results show that NSS-CC is superior to congestion control algorithms such as DO, DF, DY, and DL.