METHOD OF RELAY NODE SELECTION IN DELAY TOLERANT NETWORKS

摘要

The present invention relates to a relay node selecting method in a delay tolerant network. The relay node selecting method in the delay tolerant network comprises: a step of enabling a source node transmitting data to a base station to calculate a connection value between a plurality of cluster head nodes and the base station by using speed information and direction information of the cluster head nodes in a coverage; a step of selecting a cluster head node having the biggest connection value as a relay node by comparing the connection values of the cluster head nodes; and a step of enabling the source node to extend the coverage based on a communication range of the cluster head nodes when the calculated connection values are zero, collecting a connection relation matrix for nodes included in each communication range of the cluster head nodes, and selecting the relay node by using a mixed matrix mixing the collected connection relation matrix. Therefore, the present invention selects a node, which is toward the base station and includes fast speed, and transmits data within a fast delay time, thereby improving data transmission efficiency from the source node to the base station.