Last week, SCAN participated in the 2nd Fed4Fire+ Engineering Conference, organized by CERTH in Volos, Greece
SCAN was one of the experimenter teams who demonstrated their experimentation outcomes in NITOS test bed facilities, as part of the Fed4Fire+ experimentation. The demonstration took place in the main conference room, with posters and demo set-ups.
More than 15 experiments were demonstrated during the demo night with lots of interesting discussions taking place during the session.
SCAN demonstrated CLC, a Cross Layer Controller based on SDN and SDR towards 5G Heterogeneous Networks, and received very positive feedback.
While SDR and SDN are key technologies focused on different layers of the network stack, the key idea is to bridge the gap between these technologies to build a cross-layer architecture platform, so that heterogeneous networks comprising wired, wireless, and SDR-based devices can be managed in a uniform and consistent way using the principles of SDN, and true network visibility can be built-in and maintained throughout the network.
This experiment evaluates CLC, a cross-layer control application, which coordinates the resource allocation, both in the radio, as well as in the SDN flows in the backhaul of the network. CLC provides flexibility at radio level and network level aiming to map the radio slices with the network slices for an end-to-end slicing mechanism, which will optimize the QoS for forthcoming 5G verticals.
In this experiment, CLC focuses on 5G Heterogeneous Networks use case, and more specifically, on dense LTE – WiFi deployments. Some of the primary challenges to be addressed in such dense radio environments is on the one hand the interference mitigation, -since numerous base stations (LTE macro cells, femto cells, etc.) and Wi-Fi APs coexist and interfere with each other-, while on the other hand manage the resource scarcity in an efficient way, in order to provide the optimal network and radio slices to groups of User Equipments (UEs), depending on their specific application/service requirements.
The evaluated framework is implemented building on top of 3 controllers/frameworks for radio and network flows management, i.e., EmPOWER Wireless SDN controller for Wi-Fi slicing and configuration, Open Air Interface LTE radio protocol stack and controller, as well as Ryu SDN framework based on the OpenFlow protocol.