Model Checker For Railway Signalling
Communication Protocol
Author(s)
J.-G. Hwang, H.-J. Jo & J. H. Lee
Abstract
As a very important part in the development of the protocol, verifications for a
developed protocol specification are complementary techniques that are used to
increase the level of confidence in the system functions by their specifications.
Using the informal method for specifying the protocol, a little ambiguity may be
contained in the protocol. This indwelling ambiguity in control systems can be
the cause of accidents, especially for safety-critical systems. To clear the
ambiguity contained in the designed protocol, we use the LTS (Labelled
Transition System) model to design the standard protocol for railway signalling
systems. Then we verify the safety and liveness properties automatically and
formally through the model checking method. The modal ยต-calculus, which is an
expressive method of temporal logic, has been applied to the model checking
method. In this paper, we verify the safety and liveness properties of the Korean
standard protocol for railway signalling systems. To automatically check the
safety and liveness properties of the designed protocol, the formal checker is
implemented. The developed tools are implemented by the C++ language under
Windows XP.
1 Introductions
A few years ago, most of the equipment consisted of vital relay-based systems
ensure the safety of railway signalling systems. However, according to the
computerization of railway signalling systems, lots of information is exchanged
among the computerized railway signalling equipment. By the systemization
of railway signalling systems, the communication link is considered more
significant than before. Therefore, the communication protocol has to be clearly
Keywords
Related Book
Other papers in this volume
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