Delay modeling and analysis in DTN multicasting

The main character of Delay Tolerant Networks (DTNs) is that there is not an end-to-end path from the source node to the destinations due to the intermittent connections and mobility of nodes. In this paper, we construct the mathematic model based on queue with vacation theory to analyze the impact of buffer management strategy on DTN multicast routing, and then compute the minimal delay and maximal delay from the source to the destinations according to this model; at last, we do simulation with On-demand Routing, Dynamic Tree Routing and Static Tree Routing algorithms, and the results show that our theory runs well.