Adjusting transport segmentation policy of DTN Bundle Protocol under synergy with lower layers

We assess Delay-Tolerant Network (DTN) performance in space under the scope of adjusting protocol data unit (PDU) size at various layers. We quantify the importance of combinatively adjusting size of DTN bundles, transport packets, and link frames. Through simulations, our paper reveals trade-offs that involve file delivery time, transmission effort of sending nodes, and memory resources release rate. Based on our findings, we propose a transport adaptation scheme that dynamically adjusts DTN bundle and transport packet size by means of heuristic search. To our knowledge, this is the first study to examine transport segmentation policy and interaction among various layers of the DTN protocol stack.