Real-time Asynchronous Conflict Solving
Algorithms For Computer Aided Train
Dispatching Assistance Systems
Author(s)
A. Kuckelberg & E. Wendler
Abstract
The computer aided real time dispatching assistance of train runs is a hard and
complex problem. Although several approaches for dispatching and train surveillance
exists – often limited to very specific aspects and situations of computer
aided train operation – an integrated and flexible system covering train location,
delay detection, computer aided (automated) conflict resolution and dispatching
decision propagation is not available. The project DISKON is a development
project initiated and assigned by DEUTSCHE BAHN AG that targets such a system.
The proof of concept for this integrated approach has been made in 2007, when
the system was tested several weeks at the Integrated Railway Laboratory (IEL)
of the University of Dresden. In 2007 and 2008 the evaluation continued under
real time conditions within operation control centres. Besides different modules
and components for functionalities like train position detection, train run forecast,
track assimilation and prognosis of arrival and departure times one scientific core
of the DISKON system is a microscopic conflict solving component on blocking
time level, enriched by another macroscopic component evaluating links of connection
trains. The solving algorithm extends the ASDIS/L-system developed at
the RWTH Aachen. It follows an asynchronous approach, considering conflicts
chronologically and depending on priority values of the involved trains. The base
algorithm was elementarily revised and enhanced by conflict situation detection
and a derived conflict solving strategy builder. The result set of the strategy builder
controls the parameter and the behaviour of the base algorithm. In this paper a
rough architecture of dispatching systems is introduced, system requirement, environmental
condition and behaviour are identified and a differentiated system evaluation
is presented.
Keywords
Related Book
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