Workshop Paper Presented at SIGCOMM 2025

We presented our paper Towards URLLC with Open-Source 5G Software in OpenRIT6G Workshop at SIGCOMM 2025 in Coimbra, Portugal.

Abstract
Ultra-Reliable Low-Latency Communication is a key feature of 5G, yet achieving its strict one-way latency target remains challenging in real-world deployments.
While previous work proposes latency-reduction techniques, most are theoretical or simulation-based and overlook practical bottlenecks in actual systems.
In this paper, we analyze and optimize latency with open-source 5G RAN software.
We characterize latency sources arising from 5G specifications and implementation-level factors, along with their complex interplays.
Guided by this analysis, we introduce improvements reducing one-way latency by 39.28% in the downlink and 55.38% in the uplink.
Our results show the importance of system-level experimentation and provide a blueprint for advancing toward URLLC targets in both 5G and future cellular networks.