Ensuring SLA Compliance of Edge Enabled Cloud Service for IoT Application: A Dynamic QoS-Aware Scheme

The synergy and convergence of edge, cloud and Internet of Things (ECoT) has increasingly become a promising service paradigm. It provides a wide variety of benefits for IoT applications deployed at the edge of the network to serve end users. However, the open connectivity, complex heterogeneity, and flexible mobility of the ECoT environment bring the challenging issues of service level agreement (SLA) compliance to various IoT applications. To this end, a dynamic QoS-aware based SLA compliance verification model is proposed. Considering the dynamic uncertainty of QoS attributes of edge service in ECoT context, the model presents a QoS consistency detection method to enhance its fault tolerance for QoS violation. Moreover, the model adopts an objective weight assignment method for dynamic QoS to improve the accuracy of SLA compliance verification. Finally, the simulation experiments conducted using a real-world dataset show that our scheme can effectively ensure SLA compliance of edge enabled cloud service for IoT applications.