Power-Efficient Beam Tracking During Connected Mode DRX in mmWave and Sub-THz Systems

Discontinuous reception (DRX), wherein a user equipment (UE) temporarily disables its receiver, is critical power saving feature in modern cellular systems. DRX likely to be aggressively used at mmWave and sub-THz frequencies due the high front-end consumption. A key challenge for these blockage-induced link outages: UE will need track many directional links ensure reliable multi-connectivity, thereby increasing In this paper, we explore bandit algorithms tracking connected mode that reduce consumption by only fraction of available links, but without adversely affecting outage throughput performance. Through detailed, system level simulations 28 GHz (5G) 140 (6G), observe even sub-optimal policies can achieve considerable savings with relatively little degradation performance, especially digital beamforming UE. particular, show it feasible 75% still up 95% (80%) maximum using (140 GHz), subject an probability most 1%.