Rede de acesso virtualizada: alocação e posicionamento de recursos
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Data
2018-10-05
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Universidade Federal de Goiás
Resumo
There are great expectations in CRAN and network virtualization (NFV) technologies, and
especially in view of the potential they have to accelerate the deployment of new services
while lowering the costs of network operators. Several papers discussed the benefits of
deploying a new network infrastructure with such technologies, but only a few investigated
how the transition from a legacy network could be. In this context, there is a relevant problem
that involves three main issues: 1) which network locations should be updated; 2) how to
update the selected location, \ie, to fully virtualized or not; and 3) who should attend
virtualized sites. These issues are influenced by the level of centralization employed in a given
access network (RAN). Here we propose two optimization models and two heuristics that allow
the decision maker to define the desired level of centralization and to evaluate its impact on
some metrics such as the investment needed and the level of centralization actually achieved.
The models show how the investment should be applied according to the level of centralization
and the relative cost between the different resources. Our heuristics present similar
performance to the exact approach for relatively small scenarios of the problem, but are able
to solve topologies of networks with large number of vertices and maintain a satisfactory
solution close to the ideal.
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Palavras-chave
CRAN , NFV , RAN , LTE , SDN , Virtualização , Alocação de recurso , CRAN , NFV , RAN , LTE , SDN , Virtualization , Resource allocation
Citação
SOUZA, P. A. Rede de acesso virtualizada: alocação e posicionamento de recursos. 2018. 74 f. Dissertação (Mestrado em Ciência da Computação) - Universidade Federal de Goiás, Goiânia, 2018.