Papers › Average AoI Minimization for Energy Harvesting Relay-aided Status Update Network Using...
Average AoI Minimization for Energy Harvesting Relay-aided Status Update Network Using Deep Reinforcement Learning
Sin-Yu Huang, Kuang-Hao, Liu
A dual-hop status update system aided by energy harvesting (EH) relays with finite data and energy buffers is studied in this work. To achieve timely status updates, the best relays should be selected to minimize the average age of information (AoI), which is a recently proposed metric to evaluate information freshness. The average AoI minimization can be formulated as a Markov decision process (MDP), but the state space for capturing channel and buffer evolution grows exponentially with the number of relays, leading to high solution complexity. We propose a relay selection (RS) scheme based on deep reinforcement learning (DRL) according to the instantaneous channel packet freshness and buffer information of each relay. Simulation results show a significant improvement of the proposed DRL-based RS scheme over state-of-art approaches.
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