Probability-based dispatching framework for speed-test applications: design and implementation

Speed-test applications come handy to validate the compliance of any established network connection against the pre-negotiated E2E QoS indicators, even though they have cope with strict requirements to provide correct measures to any user. Therefore Software-Defined Networking approaches can help these measurement instruments driving the choice in terms of paths and resources. In this framework we show a speed-test application which tackles the user-server assignation problem proposing a client-base dispatching framework which operates leveraging two sets of parameters named endogenous (measured by the client itself) and exogenous (requiring the interaction with external elements). Framework implementation is documented, for which step-by-step evaluation of such parameters is provided, followed by their context-dependent optimization via a stochastic gradient-descent approach properly tuned to operate in a real distributed speed-test facility.