Inproceedings,
Waiting Time Estimation for Periodic Traffic Sources in a Chain of Nodes
29th International Teletraffic Congress (ITC 29), Genoa, Italy, (2017)
Abstract
Commercial-off-the-shelf (COTS) components are used in numerous communication systems and application fields for cost reduction. While this trend is adopted in various home and business scenarios, most components for safety critical systems are proprietary or significantly modified. This also applies to networks using IP over Ethernet. Hardly any accepted methods to certify safety critical communication networks with such COTS components exist. This paper presents a Queueing Theory based heuristic to estimate end-to-end delay times for IP and Ethernet based communication systems with periodic traffic sources. Required input is information on the sources, network topology and routing. Traffic source models depending on few parameters, e.g. Interrupted-Poisson-Processes (IPPs), are used. Required network and source information can be obtained with reasonable effort in many domains, e.g. for maritime vessels. The feasibility of the methods introduced in this paper is therefore demonstrated for a ship network.
