Information Technology Reference
In-Depth Information
operation tests in the field. This system improves reliability by using duplex
transmission lines including the optical network. In this paper, we describe
reliability of the IP Network-based Signal Control System and discuss its ap-
plication to the Integrated Logical Controller, which is under development.
2
Overview of the IP Network-based Signal Control
System
Figure 1 shows the system configuration of the IP Network-based Signal
Control System. [1],[2] The roles of each device are also shown below.
Fig. 1. System configuration of the IP Network-based Signal Control System
2.1
Field Object Controlled Processor (FCP)
The FCP decides what control information is to be sent to the target FCs (see
2.3) based on the control information from the Interlocking and indication
information on the related signal device, and transmits the control message to
all FCs by broadcast transmission. The FC extracts the control command that
corresponds to it from the control message, and controls the signal devices.
The control result is sent back to FCP by unicast transmission. The process
concerning the safety of the control information transmission is in accordance
with IEC62280-1. [3], [4].
2.2
Network
The network uses Ethernet (100BASE-TX) in the machine room, and PON
(Passive Optical Network) in the field. PON fits for constructing the network
for the signal control devices at the wayside in the following ways.
