Alocação e posicionamento de recursos para redes de acesso virtualizadas com diferentes níveis de centralização
ResumoThere are great expectations on technologies such as network functions virtualization (NFV) and centralized or cloud radio access network (CRAN) and how they can accelerate deployment of new network services and at the same time decrease some costs of the network operators. In this context, there is a relevant problem that involves three main concerns: 1) which cell sites to be updated; 2) how to update the selected cell sites, i.e., change to fully virtual or not; and 3) where to serve the visualized cell sites. Those issues are influenced by the centralization level employed on a certain radio access network (RAN). We propose an optimization model that allows the decision maker to define the weight (or reward) of the centralization level and evaluate the impact on metrics such as the necessary investment and the achieved level of centralization. The model shows how the investment should be allocated depending on the level of centralization and the relative cost among the different resources. Our heuristic presents performance similar to the deterministic approach but it is able to obtain solutions much faster and to deal with large networks (i.e., cities and metropolitan regions).
SOUZA, Phelipe A. de; BUENO, Elivelton F.; CARDOSO, Kleber V.. Alocação e posicionamento de recursos para redes de acesso virtualizadas com diferentes níveis de centralização. In: SIMPÓSIO BRASILEIRO DE REDES DE COMPUTADORES E SISTEMAS DISTRIBUÍDOS (SBRC), 36. , 2018, Campos do Jordão. Anais do XXXVI Simpósio Brasileiro de Redes de Computadores e Sistemas Distribuídos. Porto Alegre: Sociedade Brasileira de Computação, may 2018 . ISSN 2177-9384.