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Dueling Double DQN-based directional MAC protocol for THz-band responsive spaces
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DOI：10.1016/j.icte.2026.05.003.png)
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Abstract
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Immersive services such as virtual reality (VR) and holography demand multi-gigabit throughput and ultra-low latency. To meet these demands, THz-band directional communication is essential but vulnerable to LoS blockages in dynamic responsive spaces. To address this issue, we propose a Responsive-Space Directional MAC (RS-DMAC) based on Dueling Double DQN. RS-DMAC jointly learns the selection of beams and relay nodes using an observation-driven RL formulation based on communication-level measurements. Simulation results demonstrate that RS-DMAC achieves higher throughput, lower latency, and improved link reliability compared to conventional schemes for immersive service requirements, while maintaining a reasonable energy-efficiency trade-off.
Keywords:
THz beamforming
Directional MAC
Reinforcement learning
Responsive spaces
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