Real-time control in industrial IoT

Abstract: Great advances in cloud computing have drawn the interest of industry. Cloud infrastructures areused, mainly, for monitoring the shop oor. In recent years cloud technologies combined with IoTtechnologies have initiated the eort to close loops between industrial applications and cloud infras-tructures. This thesis examines the eect of including remote servers, both local and centralized,in the closed control loop. Specically, we investigate how delays and jitter aect the closed controlloop. A prototype is developed to include servers on a control loop and inject delays and jitter inthe network. Furthermore, delay mitigation mechanisms are proposed and, using the prototype, anumber of experiments are performed to evaluate them. The mitigation mechanisms focus mainlyon delays and jitter that are larger than the period of closed control loop. The proposed mechanismsimprove the closed control loop response but still fall short compared to the performance of the closecontrol loop when it executes locally, without any servers included. We also, show that local serverscan be included in the closed control loop without signicant degradation in the performance of thesystem.