TY - JOUR
T1 - Power and Rate Adaptation for URLLC With Statistical Channel Knowledge and HARQ
AU - Peng, Hongsen
AU - Kallehauge, Tobias
AU - Tao, Meixia
AU - Popovski, Petar
PY - 2023/12
Y1 - 2023/12
N2 - This letter investigates a point-to-point ultra-reliable low latency communication (URLLC) transmission with statistical channel knowledge. We consider different hybrid automatic repeat request (HARQ) schemes and investigate the signal-to-noise ratio (SNR) feedback from failed packets to improve transmission efficiency. The problem is formulated as a long-term power minimization problem under URLLC requirement. A deep reinforcement learning (DRL) agent, employing proximal policy optimization (PPO), is used to control transmit power and the coding rate dynamically to solve the formulated problem. Simulation results demonstrate HARQ strategies, SNR feedback, and PPO algorithm can bring significant gains and reveal the impact of reliability and latency.
AB - This letter investigates a point-to-point ultra-reliable low latency communication (URLLC) transmission with statistical channel knowledge. We consider different hybrid automatic repeat request (HARQ) schemes and investigate the signal-to-noise ratio (SNR) feedback from failed packets to improve transmission efficiency. The problem is formulated as a long-term power minimization problem under URLLC requirement. A deep reinforcement learning (DRL) agent, employing proximal policy optimization (PPO), is used to control transmit power and the coding rate dynamically to solve the formulated problem. Simulation results demonstrate HARQ strategies, SNR feedback, and PPO algorithm can bring significant gains and reveal the impact of reliability and latency.
KW - Delay
KW - Encoding
KW - Power system reliability
KW - Reliability
KW - Signal to noise ratio
KW - Stochastic Processes
KW - Ultra reliable low latency communication
KW - deep reinforcement learning
KW - HARQ
KW - URLLC
UR - http://www.scopus.com/inward/record.url?scp=85169690745&partnerID=8YFLogxK
U2 - 10.1109/LWC.2023.3310205
DO - 10.1109/LWC.2023.3310205
M3 - Journal article
SN - 2162-2337
VL - 12
SP - 2148
EP - 2152
JO - I E E E Wireless Communications Letters
JF - I E E E Wireless Communications Letters
IS - 12
ER -
