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System-Level Evaluation of 5G NR UE-Based Relays



Samantha Gamboa Quintiliani, Aziza Ben Mosbah, Wesley Garey, Chunmei Liu, Richard A. Rouil


The notion of UE-based relays started with the introduction of Proximity Services (ProSe) and Device-to-Device (D2D) communication, and evolved with the adaptation of the Fifth Generation (5G) New Radio (NR) interface. While the main goal of relays is to extend coverage, many parameters play a role in determining its effective range and benefits. In this paper, we study a military use case involving UE-to-Network (U2N) relays providing connectivity to a squad of soldiers with limited coverage. We configure advanced NR Sidelink (SL) functionalities that include diverse numerologies, sensing-based resource selection, and blind retransmissions. We evaluate the end-to-end network performance in terms of packet delivery ratio and latency. We show, through system-level simulations, that the choice of the different NR SL parameters is critical to achieve the expected performance in scenarios where the relay UE is serving variable number of UEs. We also discuss observed trade-offs and how they should be taken into consideration when establishing performance targets.
Conference Dates
October 30-November 3, 2023
Conference Location
Boston, MA, US
Conference Title
Military Communications Conference


Mobile Networks, Modeling and Simulation, Fifth Generation (5G), New Radio (NR), Sidelink (SL), Proximity Services (ProSe), UE-to-Network (U2N) relay


Gamboa Quintiliani, S. , Ben Mosbah, A. , Garey, W. , Liu, C. and Rouil, R. (2023), System-Level Evaluation of 5G NR UE-Based Relays, Military Communications Conference, Boston, MA, US, [online],, (Accessed March 5, 2024)
Created December 25, 2023, Updated February 6, 2024