Browsing by Author "Wickboldt, Juliano Araujo"

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    Flexible fine-grained baseband processing with network functions virtualization: Benefits and impacts
    Kist, Maicon; Wickboldt, Juliano Araujo; Granville, Lisandro Zambenedetti; Rochol, Juergen; DaSilva, Luiz A.; Both, Cristiano Bonato (Elsevier, 2019-03-14)
    The increasing demand for wireless broadband connectivity is leading mobile network operators towards new means to expand their infrastructures efficiently and without increasing the cost of operation. Network Functions Virtualization (NFV) is a step towards virtualization-based, low-cost flexible and adaptable networking services. In the context of centralized baseband architectures, virtualization is already employed to run baseband processing units as software on top of conventional data center hardware. However, current virtualization solutions consider atomic virtualization, i.e., single virtual machines implementing all baseband functionalities. In this article, we propose the fine-grained virtualization of baseband processing to achieve a more flexible distribution of the processing workload in centralized architectures. We also evaluate the benefits of our approach in terms of (i) the bandwidth requirements for each fine-grained distribution option, (ii) the latency experienced by mobile users for each fine-grained distribution option, and (iii) the total CPU usage of each fine-grained baseband processing function.
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    FUTEBOL Control Framework: Enabling Experimentation in Convergent Optical, Wireless, and Cloud Infrastructures
    Both, Cristiano; Guimaraes, Rafael S.; Slyne, Frank; Wickboldt, Juliano Araujo; Martinello, Magnos; Dominicini, Cristina; Martins, Rafael; Zhang, Yi; Cardoso, Diego; Villaca, Rodolfo; Ceravolo, Isabella; Nejabati, Reza; Marquez-Barja, Johann M.; Ruffini, Marco; DaSilva, Luiz A. (IEEE, 2019-10-01)
    Large-scale testing and evaluation of network solutions are complex and typically involve multiple domains (e.g., optical, wireless, and cloud). The FUTEBOL project has deployed geographically distributed testbeds in Brazil and Europe that enable the experimentation and validation of new cross-domain network solutions. In this article, we introduce a Control Framework that allows experimenters to slice, reserve, and orchestrate optical, wireless, and cloud resources in a coordinated manner. We illustrate the features of our Control Framework and evaluate it through an experiment involving resource orchestration and automatic service scaling across multiple domains.