End-to-End Delay Guarantees for Real-Time Systems using SDN
Real-time systems (RTS) require end-to-end delay guarantees for the delivery of network packets. In this paper, we propose a framework to reduce the management and integration overheads for such real-time (RT) network flows by leveraging the capabilities of software-defined networking (SDN) – capabilities that include global visibility and management of the network. Given the specifications of flows that must meet hard realtime requirements, our framework synthesizes paths through the network. To guarantee that these flows meet both, their bandwidth and end-to-end timing requirements, our framework solves a multi-constraint optimization problem using a heuristic algorithm. We use exhaustive emulations and experiments on hardware switches to demonstrate our techniques and feasibility of our approach. As a result of this work, SDNs become “delayaware” and thus can be adapted for use in safety-critical and other delay-sensitive applications.
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