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The virtualization of radio access networks (RANs) is emerging as a keycomponent of future wireless systems, as it brings agility to the RANarchitecture and offers degrees of design freedom. In this paper, weinvestigate and characterize the computational and memory requirements ofvirtual RANs. To this end, we build a virtual RAN test-bed leveraging thesrsRAN open-source mobile communication platform and general-purposeprocessor-based servers. Through extensive experiments, we profile theconsumption of computing and memory resources, and we assess the systemperformance. Further, we build regression models to predict the system behavioras the number of connected users increases, under diverse radio transmissionsettings. In so doing, we develop a methodology and prediction models that canhelp designing and optimizing virtual RANs.

Characterizing the Computational and Memory Requirements of Virtual RANs