Research and development in the field of signalling is faced with the challenge of providing cost-effective solutions for high availability of safety-relevant systems.
The focus is generally on implementing various redundancy strategies. However, the complete duplication of system components, in particular, gives rise to significant additional costs.
As an alternative to a fully-redundant design, intelligent functions to increase the fault tolerance of signalling systems provide interesting options. External factors are frequently identified as the cause of a range of faults in train detection systems. In many cases, the resulting system faults can be absorbed by implementing intelligent, fault-tolerant functions without affecting the safety level of the complete system.
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