RAILWAY-TRAIN COMMUNICATION APPARATUS
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Accused Products
Abstract
A railway-train communication apparatus transmits a first transmission signal flowing through an inter-car network between cars of a railway train and a second transmission signal flowing through an in-car network in each of the cars. A node device includes a first signal converter and a second signal converter that perform a signal conversion between the first transmission signal and the second transmission signal and a layer 2 switch arranged between the first signal converter and the second signal converter for connecting the first signal converter and the second signal converter. A first controller is connected to the layer 2 switch.
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Citations
35 Claims
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1-18. -18. (canceled)
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19. A railway-train communication apparatus that performs transmission processes of transmitting a first transmission signal flowing through an inter-car network constructed between cars of a railway train and a second transmission signal flowing through an in-car network constructed in each of the cars, the railway-train communication apparatus comprising:
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a node device that is provided in each of the cars, the node device including a first signal converter and a second signal converter each performing a signal conversion and a transmission speed conversion between the first transmission signal and the second transmission signal, and a layer 2 switch arranged between the first signal converter and the second signal converter for connecting the first signal converter and the second signal converter; and a first controller that is connected to the layer 2 switch, wherein the first signal converter converts the first transmission signal received from an adjacent inter-car network on a first side into the second transmission signal and outputs the second transmission signal to the layer 2 switch, and converts the second transmission signal received from the layer 2 switch into the first transmission signal and outputs the first transmission signal to the adjacent inter-car network on the first side, and the second signal converter converts the first transmission signal received from an adjacent inter-car network on a second side into the second transmission signal and outputs the second transmission signal to the layer 2 switch, and converts the second transmission signal received from the layer 2 switch into the first transmission signal and outputs the first transmission signal to the adjacent inter-car network on the second side. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification