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Publication . Conference object . Preprint . 2021

Nuberu: Reliable RAN Virtualization in Shared Platforms

reliable RAN virtualization in shared platforms
Gines Garcia-Aviles; Andres Garcia-Saavedra; Marco Gramaglia; Xavier Costa-Perez; Pablo Serrano; Albert Banchs;
Open Access
English
Abstract
RAN virtualization will become a key technology for the last mile of next-generation mobile networks driven by initiatives such as the O-RAN alliance. However, due to the computing fluctuations inherent to wireless dynamics and resource contention in shared computing infrastructure, the price to migrate from dedicated to shared platforms may be too high. Indeed, we show in this paper that the baseline architecture of a base station��s distributed unit (DU) collapses upon moments of deficit in computing capacity. Recent solutions to accelerate some signal processing tasks certainly help but do not tackle the core problem: a DU pipeline that requires predictable computing to provide carrier-grade reliability. We present Nuberu, a novel pipeline architecture for 4G/5G DUs specifically engineered for non-deterministic computing platforms. Our design has one key objective to attain reliability: to guarantee a minimum set of signals that preserve synchronization between the DU and its users during computing capacity shortages and, provided this, maximize network throughput. To this end, we use techniques such as tight deadline control, jitter-absorbing buffers, predictive HARQ, and congestion control. Using an experimental prototype, we show that Nuberu attains >95% of the theoretical spectrum efficiency in hostile environments, where state-of-art approaches lose connectivity, and at least 80% resource savings
This work has been supported by the European Commission through Grant No. 101017109 (DAEMON project) and Grant No. 101015956 (Hexa-X project), and the CERCA Programme/Generalitat de Catalunya.
Subjects by Vocabulary

Microsoft Academic Graph classification: Network virtualization Computer network business.industry business Virtualization computer.software_genre computer Reliability (computer networking) Computer science 5G Pipeline (computing) Synchronization (computer science) Network congestion Base station

Subjects

Mobile networks, RAN virtualization, vRAN, O-RAN, 3GPP, 5G,, 6G, Distributed Unit, RAN disaggregation, NFV, Network virtualization

Related Organizations
Funded by
EC| DAEMON
Project
DAEMON
Network intelligence for aDAptive and sElf-Learning MObile Networks
  • Funder: European Commission (EC)
  • Project Code: 101017109
  • Funding stream: H2020 | RIA
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