INTRIG
Published September 8, 2025 | Version v1
Conference paper Open

POSTER: FlexUP: Breaking Up the CU-UP to Speed Up the RAN

Creators

  • 1. ROR icon Universidade Federal do Pampa
  • 2. University of Campinas
  • 3. ROR icon University of Amsterdam

Description

The Centralized Unit User Plane (CU-UP) in 5G networks works as an aggregation point of the RAN, facing increasing performance demands yet commonly limited by general-purpose processors. In this work, we present FlexUP, an architecture that offloads CU-UP functions to programmable switches and SmartNICs via a three-path abstraction: fast, medium, and slow. By matching function complexity to the appropriate hardware, FlexUP can improve latency, throughput, and resource efficiency while aligning with the modular and disaggregated principles of Open RAN (O-RAN).

Files

CU_UP_poster_sigcomm25-8.pdf

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Additional details

Funding

Fundação de Amparo à Pesquisa do Estado de São Paulo
SMART NEtworks and ServiceS for 2030 (SMARTNESS) 2021/00199-8
European Commission
DESIRE6G - Deep Programmability and Secure Distributed Intelligence for Real-Time End-to-End 6G Networks 101096466
Fundação de Amparo à Pesquisa do Estado de São Paulo
2024/16207-8
Fundação de Amparo à Pesquisa do Estado de São Paulo
2020/05183-0
Fundação de Amparo à Pesquisa do Estado de São Paulo
2023/00794-9
Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul
24/2551-0001394-6
National Council for Scientific and Technological Development
404027/2021-0

Dates

Available
2025-09-08