Reliability Evaluation of Data Communication System Based on Dynamic Fault Tree under Epistemic Uncertainty

Table 1

The basic events of DCS.

Node symbol	Description
X1	Software failure
X2	Regional traction power supply 1
X3	Regional traction power supply 2
X4	Regional control system 1
X5	Regional control system 2
X6	Vehicle location system 1
X7	Vehicle location system 2
X8	Switch failure
X9	Fiber network failure
X10	Vehicle base station 1
X11	Vehicle base station 2
X12	Ground base station 1
X13	Ground base station 2
X14	Power board 1 for MRCU
X15	Power board 2 for MRCU
X16	MRCU multiplexer board 1
X17	MRCU multiplexer board 2
X18	MRCU demultiplexer board 1
X19	MRCU demultiplexer board 2
X20	Power board 1 for DRCU
X21	Power board 2 for DRCU
X22	DRCU multiplexer board 1
X23	DRCU multiplexer board 2
X24	DRCU demultiplexer board 1
X25	DRCU demultiplexer board 2
X26	Traction control system