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arXiv · 2507.10207

Low-Power Wake-Up Signal Design in 3GPP 5G-Advanced Release 19

Sebastian Wagner
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Abstract

The Low-Power Wake-Up Signal (LP-WUS) and Low-Power Synchronization Signal (LP-SS), introduced in 3GPP 5G-Advanced Release 19, mark an important advancement toward power-efficient IoT communications. This paper provides a comprehensive overview of the LP-WUS procedures in the RRC_IDLE and RRC_INACTIVE states and summarizes the key physical-layer design aspects. The LP-WUS is intended to be detected by a low-power energy detector (ED), allowing the main radio (MR) to remain switched off, thereby enabling substantial power savings compared to conventional 5G paging mechanisms. As such, LP-WUS is considered the baseline for 6G WUS design. Furthermore, different receiver architectures are evaluated, highlighting the inherent trade-offs between power-saving gains and coverage performance.

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Sebastian Wagner. 2026-02-02. Low-Power Wake-Up Signal Design in 3GPP 5G-Advanced Release 19. https://arxiv.org/abs/2507.10207

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