Um arcabouço para compartilhamento eficiente de WLANs Wi-Fi por fatiamento de rede no contexto de redes ultra densas 5G

Abstract

The advent of future 5th Generation (5G) use cases has challenged the traditional network infrastructures. The need for low latency, high bandwidth, scalability, ubiquitous access and support for IoT resource-constrained devices are some of the issues that network operators have to face to support future 5G use cases. The Wi-Fi WLAN technology, due to its high density on the urban centers and its capacity to provide shared connectivity through solutions such as hotspots, offers enormous connectivity opportunities to users and devices. By taking into account the ISP infrastructure resources (which are close to end-users) in addition to the Wi-Fi networks, it is possible to have a network edge infrastructure with a huge potential to meet the beforementioned needs. In spite of that, our state of the art study suggested that none of the mentioned works are able to articulate such an edge infrastructure satisfactorily. This thesis proposes a solution able to employ the substrate composed by the Wi-Fi shared networks and the ISP infrastructure resources (including access network resources) to offer at the urban space scalable, pervasive, low latency, and localized services. The proposed solution, named WLAN SlIcing SErvice (WISE), employs emerging technologies, such as the ones for computing and network virtualization, to slice the underlying infrastructure in partitions able to offer differentiated, isolated, and independently managed services. The WISE framework also expands the computing capabilities of the Wi-Fi-shared Customer Premise Equipment (CPE) by transforming such devices into fog nodes able to host part of the WISE functionalities and to run virtualized local services. The WISE framework was evaluated through a real testbed and the results had shown its superiority in comparison to traditional Wi-Fi-sharing solutions.