Tan, P. H., Boonkajay, A., & Huang, M. L. (2025). Enhancing Physical Layer Key Generation in 5G TDD Systems with Asymmetric Channels. 2025 IEEE 102nd Vehicular Technology Conference (VTC2025-Fall), 1–5. https://doi.org/10.1109/vtc2025-fall65116.2025.11310503
Abstract:
We introduce a lightweight, multi-stage framework
called Correlation-Enhanced CSI Sampling (CESS) to address
this challenge. CESS combines full-slot channel interpolation,
inter-slot CSI processing to close the temporal measurement
gap, and intra-slot subcarrier processing to mitigate frequency
domain correlation issues. Through simulations, we compare
CESS to a conventional PLKG baseline, showing that CESS
substantially lowers the Key Disagreement Rate (KDR) and
boosts the effective Key Generation Rate (KGR), with a minimum
KGR of 3.5 kbps. These results underscore CESS’s potential for
secure and reliable PLKG in real-world 5G TDD systems.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the National Research Foundation Singapore (NRF), Infocomm Media Development Authority (IMDA) - Future Communications Programme - 6G Communications Confidentiality and Physical Layer Security
Grant Reference no. : FCP-ASTAR-RG-2024-023