Optimal Transmission Policy Based on POMDP over Ka-Band Channels in SINs

The Ka-band channels can provide an appealing capacity for the future deep-space communications and space information networks (SINs). In this paper, the noise temperature of time-varying rain attenuation at Ka-band channels is modeled to two states Gilbert-Elliot channel, to capture the channel capacity that randomly ranging from good to bad state. An optimal transmission scheme based on Partially Observable Markov Decision Processes (POMDP) is proposed, and the key thresholds for selecting the optimal transmission method for space information networks (SIN) are derived. Simulation results show that our proposed scheme can effectively improve the throughput.