Ολοκληρωμένο σύστημα διαχείρισης συμβολαίων παροχής υπηρεσιών σε περιβάλλοντα 5G
Complete service level agreements management framework in 5G environment
KeywordsΣυμβόλαια παροχής υπηρεσιών ; Δίκτυα 5ης γενιάς ; Παρακολούθηση υποδομής ; Παροχή ποιότητας υπηρεσιών ; Εικονικοποίηση υπηρεσιών δικτύου
5G networks are the next generation of mobile internet connectivity, delivering faster speeds and more reliable connections. According to latest researches, the 5G network will be able to provide much more fast connections than currently, with average download speeds around 1GBps, to be considered as the rule. In such an emerging environment, efficient Service Level Agreements (SLA) management becomes mandatory. An SLA is a contract between a service provider and its internal or external end-users. The purpose of the contract is to guarantee the Quality of Service (QoS) provided, and to ensure that it meets the customer's requirements. An important role in this task is the explicit and clear definition of the needs and requirements of both the customer and the provider. Thus, guaranteeing the required QoS in 5G networks, and efficient allocation of infrastructure resources, is a challenge. The reason is the limited amount of information that passes from the control plane, to the data plane, resulting the difficulty of translating the customer-related business terms (e.g. availability of NS), into low-level resource parameters (e.g. CPU, RAM), which can be used to manage resources in the 5G Core network infrastructure. To address the aforementioned challenges, we propose an architecture which can support the SLA management during a Network’s Service (NS) lifecycle from the SLA Template generation to the violation detection. The proposed architecture is based in a generic black box approach in order to map high-level requirements expressed by users to low-level network parameters, enabling QoS provisioning. Furthermore, an adaptive monitoring framework will support the QoS assurance. We propose an adaptive scheduling algorithm, aiming at the removal of static time interval applied in the monitoring system, aiming to provide highly accurate information in real time without producing unnecessary traffic to the network. Among with the research part, in the current Thesis it was also developed a prototype SLA Management Framework, that allows to manage the whole life-cycle of service level agreements - from template creation to violation detection. The implemented framework was evaluated in a real 5G enabled Service Platform, that aims to support the interaction between a distributed set of users and resources. Finally, the Thesis concludes with some thoughts for future research and potentials for the current study.