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Stability and deadlock avoidance in distributed systems for traffic control

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3 Author(s)
Parodi, G. ; Dept. of Biophys. & Electron. Eng., Genoa Univ., Italy ; Vernazza, G. ; Zunino, R.

This paper describes a distributed method for traffic control and addresses the crucial problem of stability from both a formal and a practical perspective. Within a continuous-time and continuous-space approximation, a mathematical analysis first demonstrates the inherent stability of priority-based local decision making. Then, a more realistic model takes into account a network's finite connectivity and the time-discrete nature of events. This paper shows how deadlock-avoidance algorithms can be effectively included in a distributed system. Experimental results obtained by a realistic railway model prove that the inclusion of deadlock avoidance can provide early detection of critical situations, thus making it possible to schedule appropriate decisions or to drive a routing mechanism to enhance traffic flow

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Vehicular Technology, IEEE Transactions on  (Volume:45 ,  Issue: 4 )