Markov decision-based optimisation on bundle size for satellite disruption/delaytolerant network links

In a satellite disruption/delay-tolerant network, bundle delivery is obviously affected by time-varying parameters, i.e. bit error rate and propagation latency, due to constantly changing distance and connectivity between paired orbital nodes. The authors proposed a Markov decision-based optimisation approach for bundle size, which could efficiently improve the expected time of delivery over a dynamic two-hop inter-satellite link. In particular, a group of optimal bundle sizes are adaptively selected according to current distance-dependent channel parameters, leading to a full utilisation on intermediate node's memory. The simulation results verified the proposed method under different conditions with comparison.