The flexible grouping function is a network technology that cooperates with the flexible use of railway vehi-cles,not only responding to complex and changing operation and maintenance conditions,but also improving the efficiency of rail transit equipment network configuration.This paper is based on the flexible grouping technology of Ethernet,which is implemented through the network initial operation and train topology discovery protocols in the IEC61375-2-5 protocol.It has high reference value for solving the application problems of train network systems.
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