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The fifth-generation mobile evolution enables transformations onNext-Generation Radio Access Networks (NG-RAN). The RAN protocol stack is splitinto eight disaggregated options combined in three network units, i.e.,Central, Distributed, and Radio. Besides that, further advances allow the RANfunctions to be virtualized on top of general-purpose hardware, using theconcept of virtualized RAN (vRAN). The Combination of NG-RAN and vRAN resultsin vNG-RAN, which enables the management of the disaggregated units andprotocols as a set of radio functions. However, the orchestration-basedplacement of these radio functions is a challenging issue since the bestdecision can be determined by multiple constraints involving RANdisaggregation, crosshaul networks requirements, availability of computationalresources, etc. This article proposes OPlaceRAN, a vNG-RAN deploymentorchestrator framed within the NFV reference architecture and aligned with theOpen RAN initiative. OPlaceRAN supports the dynamic placement of radiofunctions focusing on vNG-RAN planning and is designed to be agnostic to theplacement optimization model. To validate OPlaceRAN, we developed a prototypebased on up-to-date cloud-native tools to deploy RAN using containerizedvirtualization using the OpenAirInterface emulator and considering two distinctfunctional splits (options 2 and 6). The evaluation is tested asproofs-of-concept in a real computing infrastructure using two differentplacement solutions. Our results reveal that OPlaceRAN is an effectivecloud-native solution for containerized network functions placement andagnostic to the optimization model. Additionally, OPlaceRAN is up-to-date withthe most advanced vNG-RAN design and development approaches, contributing tothe evolution of the fifth-generation of mobile networks.

OPlaceRAN -- a Placement Orchestrator for Virtualized Next-Generation of Radio Access Network