3GPP Technical Document Summary
Document Information
- Document Number: R4-2511782 (Response to S4-260017)
- Meeting: RAN4 #116, Bengaluru, India, August 25-29, 2025
- Type: Response LS (Liaison Statement)
- Release: Release 20
- Work Item: FS_ULBC (Feasibility Study on UL Broadcast)
Purpose
This document provides RAN4's response to SA4's LS (R4-2509024/S4-251584) regarding RAN simulation assumptions for ULBC, specifically addressing questions about supported power classes for NB-IoT NTN UE and HPUE.
Main Technical Contributions
Power Class Support for NB-IoT NTN
Current Release Support (Rel-18 onwards)
- Power Classes: PC3 (23dBm) and PC5 (20dBm)
- Supported Bands: 256, 255, 254, and 253
- Extension in Rel-19: Band 252 added for PC3/PC5 support
Release 19 Enhancements
- New Power Classes Introduced:
- PC1 (31dBm)
- PC2 (26dBm)
- Applicable Bands: 256 and 255
- Target Device Types: Both hand-held and non-handheld devices
Release 20 Future Work
- Objective: Study and potentially specify UE transmit power higher than PC1
- Target Power Level: Up to 37 dBm for NB-IoT NTN
- Status:
- Work item approved by RAN plenary (RP-251867)
- Feasibility and specific power levels under study
- Work has not yet commenced
- No designated bands identified yet for higher than PC1 operation
Actions
RAN4 requests SA4 to consider the provided information in their future work on ULBC and related activities.