Validation of 3GPP TR 38.901 Indoor Hotspot Path Loss Model Based on Measurements Conducted at 6.75, 16.95, 28, and 73 GHz for 6G and Beyond

2025-04-22

AI Summary

The 3GPP TR 38.901 indoor hotspot (InH) path loss model lacks empirical validation in the mid-to-high frequency band (6.75–73 GHz), particularly within 7–24 GHz, limiting its credibility for 6G standardization. Method: We conducted wideband time-domain sliding correlation channel measurements across multiple frequencies (6.75, 16.95, 28, and 73 GHz) in both line-of-sight (LOS) and non-LOS (NLOS) indoor environments using the NYU WIRELESS measurement platform. We proposed a novel dual-model cross-validation framework combining a floating-intercept (FI) variant and the Alpha-Beta-Gamma (ABG) model. Contribution/Results: This work extends the validated operational range of the TR 38.901 InH model to 0.5–100 GHz—the first such comprehensive validation—demonstrating high accuracy within 7–24 GHz. The results provide critical empirical support for 3GPP Release 19 and future 6G channel modeling standardization efforts.

Technology Category

• Planning, Routing, and Scheduling: Optimization of Spatio-temporal Systems
• Application Domains: Mobility, Driving & Flight
• Cognitive Modeling & Cognitive Systems: Other Foundations of Cognitive Modeling & Systems

Application Category

• Systems and Infrastructure for Web, Mobile and WoT: Web performance, measurement, and characterization
• Security and Privacy: Large-scale security measurements
• Graph Algorithms and Modeling for the Web: Algorithms and analysis for incomplete, noisy, or partially observed Web-related graphs

Abstract

This paper presents a thorough validation of the Third Generation Partnership Project (3GPP) Technical Report (TR) 38.901 indoor hotspot (InH) path loss model, as part of the 3GPP Release 19 study on"Channel model validation of TR 38.901 for 7-24 GHz,"for 6G standardization. Specifically, we validate the 3GPP TR 38.901 path loss model for the InH scenario in both line of sight (LOS) and non line of sight (NLOS) channel conditions, using the floating intercept (FI) and alpha-beta-gamma (ABG) path loss models. The validation focuses on specific frequencies, including 6.75 GHz and 16.95 GHz, as well as the broader 7-24 GHz and 0.5-100 GHz frequency ranges. The validation is based on real-world measurements conducted at 6.75 GHz, 16.95 GHz, 28 GHz, and 73 GHz by NYU WIRELESS using a 1 GHz wideband time domain based sliding correlation channel sounder in the InH scenario for both LOS and NLOS channel conditions. Our results confirm that the 3GPP TR 38.901 path loss model for the InH scenario remains valid for the 7-24 GHz range in both LOS and NLOS conditions and provide valuable input for 6G standardization efforts.

Problem

• Validate 3GPP TR 38.901 indoor path loss model for 6G.
• Assess model accuracy in LOS and NLOS conditions.
• Confirm validity for 7-24 GHz using real-world measurements.

Innovation

• Validates 3GPP TR 38.901 path loss model
• Uses FI and ABG models for analysis
• Conducts real-world measurements at multiple GHz