GD-Aggregate: A WAN Virtual Topology Building Tool for Hard Real-Time and Embedded Applications

The convergence of computer and physical world calls for next generation Wide Area Network (WAN) infrastructures for hard real-time and embedded applications. Such networks need virtual topologies to achieve scalability, configurability, and flexibility. Virtual topologies are made of virtual links, for which, the state-of-the-art building tool is Guaranteed Rate server based aggregates (GRaggregates). However, common-practice weight assignment scheme couples GR-aggregate End-to-End (E2E) delay bound with aggregate's data throughput inverse proportionally. This is undesirable for many hard real-time embedded sensing/actuating applications, whose traffic has small data throughput but requires short E2E delay.