Mission QoS and Satellite Service Lifetime Tradeoff in Remote Sensing Satellite Networks

Abstract

The large-scale charging and discharging processes can accelerate the attenuation of battery components to further decrease the satellite service lifetime (SSL). Consequently, how to effectively manage the energy consumption during mission acquisition and transmission is an urgent problem under the condition of the stochastically fluctuating solar infeed and limited on-board battery storage resource. On the other hand, the QoS requirements of on-board missions should be guaranteed. Therefore, this letter proposes an intelligent energy management strategy by designing an online mission acquisition, processing, and transmission integration scheduling (MAPTIS) scheme, so as to control the risk of battery depletion thereby further guaranteeing SSL while improving mission QoS requirements. Particularly, we formulate the online battery management based MAPTIS problem as a finite-horizon expected total service reward Markov decision process problem. Furthermore, a backward induction battery management (BIBM) algorithm is proposed to achieve the optimal solution. Simulation results show that the BIBM scheme can effectively reduce the dynamic range of energy consumption, while achieving a compromise in the mission QoS.