2026-04-082026-04-082026-02-09PIRES JUNIOR, W. T. Energy-aware approaches to resource allocation in open radio access networks. 2026. 78 f. Dissertação (Mestrado em Ciência da Computação) - Instituto de Informática, Universidade Federal de Goiás, Goiânia, 2026.https://repositorio.bc.ufg.br/tede/handle/tede/15212The evolution of mobile communication networks toward 5G and beyond seeks to meet the demands for high throughput, low latency, and energy efficiency. Open Radio Access Networks (O-RAN), with their disaggregated and virtualized architecture, provide flexibility and interoperability but also pose significant challenges in terms of energy consumption. This work addresses energy-aware resource allocation in O-RAN, focusing on Virtualized Network Function (VNF) placement and user equipment association. We propose a Mixed Integer Linear Programming model that jointly considers radio equipment, transport network, and VNF migration energy costs while supporting flexible functional split options and routing decisions, complemented by a heuristic for scalability. Using synthetic load and topology generators, we evaluate diverse scenarios and show that hierarchical topologies achieve up to 15% more centralization and reduce energy consumption by about 28% compared to current widely adopted topologies. Additionally, joint optimization of VNF placement and user equipment association enables significant energy savings by disabling entire base stations during moments of low load. A disjoint approach to the problem is able to solve larger instances of the problem and achieves solutions close to optimal while surpassing a maximum-Signal to Noise Ratio (SNR) solution. Despite the optimal solutions being unable to meet the stringent response time required in practical deployments, they present a robust baseline for the evaluation of both the network and non-optimal approaches to the problem.Acesso Abertohttp://creativecommons.org/licenses/by-nc-nd/4.0/Rede móvelRede de acesso por rádioEficiência energéticaOrquestração de recursosProgramação matemáticaMobile networkRadio access networkEnergy efficiencyResource orchestrationMathematical programmingCIENCIAS EXATAS E DA TERRA::CIENCIA DA COMPUTACAODissertação