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Functional analysis of a telecontrol system and stochastic measures of its GSM/GPRS connections

Bobbio A., Ciancamerla E., Minichino M., Tronci E.

Archives of Transport

2005

Vol. 17, iss.3-4

39-55

Communication networks, usually born for not critical aims, are more and more used in domains which are critical for safety, availability, timeliness and quality of service. In automotive domain, Tele Control Systems (TCS), based on communication networks, are proposed in prototypal fashion, for vehicle controI inside safety critical transport infrastructures, such as long bridges and tunnels. Such systems, typically, consist of one or more Infrastucture Control Centres (ICC), aIlocated nearby the infrastructure, interconnected to the vehicles to be controlled (the mobile nodes), by a Mobile Network, even Public (PMN). In such a case, PMN is the heart of the system, makes the system more vulnerable because of many factors (complexity, mobility of nodes, response time, and public access to the network), and then requires to be highly performable and dependable. The paper discusses performability and safety measures of a PMN, computed by stochastic and functional analysis. PMN implements GSM and GPRS connections and represents the most innovative and challenging aspects of a Tele ControI System, inside a safety critical transport infrastructure.

Autorzy rozpatrują miary sprawności działania i bezpieczeństwa publicznej sieci komórkowej za pomocą analizy stochastycznej i funkcjonalnej. Prezentowana publiczna sieć komórkowa implementuje połączenia sieci GSM i GPRS oraz reprezentuje najbardziej innowacyjne i konkurencyjne elementy telekomunikacyjnego systemu sterowania wewnątrz infrastruktury transportowej w aspekcie jej bezpieczeństwa.