Meeting Delay guarantee in Telemedicine service using SDN framework

Many real-time systems require end-to-end delay guarantee. After coronavirus (Covid 19) infection spread throughout the world, adoption of telemedicine service has become extremely important. Effective telemedicine may involve providing services having different delay and bandwidth requirements. The traditional network protocols are not suitable for providing Quality of Service (QoS) as the Internet operates in best-effort mode. We explore a solution based on Software Defined Networking (SDN) to offer services varying in end-to-end delay and bandwidth requirements. We leverage programmability and centralized view of SDN network and propose a strategy where different telemedicine services may follow routes based on the available bandwidth on links and total delay along a path from the source to destination. Our simulation results show that the strategy is able to scale to a large number of requests and a large percentage of flows is able to meet the delay requirements.