Formally Verifying The Correctness Of A
Network-based Protocol For
Railway Signalling Systems
Author(s)
J.-G. Hwang & J.-H. Lee
Abstract
According to the computerization of railway signaling systems, the interface link
between the signaling systems has been replaced by the digital communication
channel. At the same time, the importance of the communication link is more
pronounced than in the past. In this paper, a new network-based protocol for
Korean railway signaling has designed between the CTC and SCADA system,
and the overview of the designed protocol is briefly represented. Using an
informal method for specifying the communication protocol, a little ambiguity
may be contained in the protocol. To clear the ambiguity contained in the
designed protocol, we use the LTS model to design the protocol for this interface
link between the CTC and SCADA, the LTS is an intermediate model for
encoding the operational behavior of processes. Then, we verify automatically
and formally the safety and the liveness properties through the model checking
method. In particular, the modal ยต-calculus, which is a highly expressive method
of temporal logic, has been applied to the model checking method. It will be
expected that the safety, reliability and efficiency of maintenance of the signaling
systems will be increased by the use of the designed protocol for railway
signaling in Korea.
1 Introduction
There are many computerized equipment in railway signaling systems such as
CTC (Centralized Traffic Control) system, EIS (Electronic Interlocking System),
ATC (Automation Train Control) system, and LDTS (Local Data Transmission
System) and so on. Lots of information is exchanged among the computerized
Keywords
Related Book
Other papers in this volume
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