The present invention provides a network system of a railcar, the network system being capable of efficiently performing maintenance work. One example of the network system of the railcar of the present invention includes: intra-car networks (N1 to N3) to which first and second apparatuses are connected; an inter-car network (NA) for transmission of information between the apparatuses mounted on different cars; routers (R1 to R3) each provided and connected between the corresponding intra-car network (N1 to N3) and the inter-car network (NA) and each including a network address translation portion configured to mutually convert a private address of the first apparatus and an IP address of the inter-car network (NA); and a maintenance transmission path forming unit configured to form a transmission path through which the transmission and reception of the information are performed between a maintenance terminal (5) and a maintenance target apparatus selected from the first and second apparatuses, the transmission path not passing through the network address translation portion of the car on which the maintenance target apparatus is mounted.

A train compartment brake control method includes: acquiring the number of train compartments of a current train; acquiring the number and type of a current train compartment; and on the basis of a train brake instruction and the number of train compartments of the current train, calculating a braking force of the current train compartment, and performing brake control on the current train compartment. The technical solution described in the present application is applicable to a train having any number of train compartments. The above method acquires the number of train compartments of a train in real time, calculates the braking force required by each train compartment according to the number and type of a current train compartment, and performs brake control on the train.

A device configured to process data comprised in data messages passing on message buses of a rolling stock comprises: a universal input interface receiving data messages complying with the three following physical layers: RS232; RS485; CAN. From the message buses, the data messages comprise data; a processing engine receiving a remote requested configuration comprising one or more processing rules; a standardizing unit decoding the data messages into standardized data streams in function of the remote requested configuration; and wherein the processing engine further applies one or more of the one or more processing rules of the standardized data streams in function of the remote requested configuration.

An inter-vehicle communication device of a vehicle provided with an electrical coupler that constructs a communication path with another vehicle by using an electric contact with said another vehicle is provided. The inter-vehicle communication device has: a communication control circuit controlling a communication with said another vehicle; a pulse transformer arranged between the communication control circuit and the electrical coupler; and a power supply device arranged between a middle point of the pulse transformer and the electrical coupler to apply a direct-current voltage to the electric contact between the electrical coupler and an electrical coupler of said another vehicle.

An IP address distribution device includes: a display; a storage storing an IP address management table in which an IP address and an in-train installation position of a device in which the IP address needs to be used are managed in association with each other and which includes information as to whether the IP address is in use or not in use; and an IP address distribution unit referring to the IP address management table in response to receiving a request for an IP address from the requesting device, displaying, on the display, unused IP addresses in association with the in-train installation positions, accepting input information for selecting, from among the unused IP addresses, an IP address corresponding to an in-train installation position of the requesting device, and selecting, from the IP address management table, an IP address to be assigned to the requesting device based on the input information.

A central device includes an information replacing unit. When the information replacing unit detects, on the basis of contact information acquired from an electric coupler provided in a coupled vehicle in a formation B having a train-information management device that manages vehicle information in accordance with the Ethernet® protocol, that a formation A that includes a train-information management device that manages vehicle information in accordance with the ARCNET protocol is coupled to the formation B, then the information replacing unit replaces vehicle information from the formation A with vehicle information in accordance with the Ethernet® protocol; outputs the replaced vehicle information to the formation B; replaces the vehicle information from the formation B with the vehicle information in accordance with the ARCNET protocol; and outputs the replaced vehicle information to the formation A.

A rail vehicle includes a vehicle unit having operating device subsystems and a guide system including a first guide system level in which operating device subsystems are networked with one another by using a digital data bus structure, and at least one second guide system level having at least one line set associated with the analog handling of processes in the operating device subsystems. In order to provide a generic rail vehicle in which a high level of safety can be achieved with little outlay on wiring, the vehicle unit includes a guide system interface device having a first interface unit associated with the data bus structure, at least one second interface unit associated with the line set, and a control unit which, in at least one operating mode, is provided for handling the processes through the second interface unit.

Provided is a network that is constituted in a train formation; communication relay devices; terminal devices; and a position-information distribution device. The communication relay devices rewrite position information from the position-information distribution device to vehicle information indicating positions of vehicles that are provided with the communication relay devices and transfer rewritten information. The terminal devices include an IP-address correspondence table in which IP addresses that are set so as not to overlap with each other for respective types of the terminal devices and are to be used while corresponding to the vehicle information and connection destination information of the terminal devices correspond to each other. IP addresses to be allocated to the terminal devices are decided on the basis of the correspondence table and the vehicle information from the communication relay devices.

In one embodiment, a gateway to a Layer-3 network forms a first Layer-2 tunnel between the gateway and a first wireless access point (AP) that communicates wirelessly with a first mobile node of a mobile system (MS) via a first wireless connection. The gateway generates a mapping that associates an onboard device of the MS with the first AP and an identifier for the MS, based on traffic conveyed via the first Layer-2 tunnel and associated with the onboard device, the traffic comprising a header that indicates the identifier for the MS. The gateway receives, from a second AP, an indication that the MS is roaming from the first wireless connection to a second wireless connection, the indication including the identifier for the MS. The gateway updates the mapping to associate the onboard device of the MS with a second AP, based on the indication that the MS is roaming.

A CANopen-based train network data transmission method includes: switching, when a first CAN channel of a first slave node is detected as faulty, to a second CAN channel of the first slave node to receive over a standby network a heartbeat packet and data transmitted by another relevant node; monitoring, if no heartbeat packet transmitted by a relevant second slave node is received from the standby network within a preset heartbeat period, by an active master node, in an active network, a heartbeat packet and data transmitted by the second slave node; receiving, through the second CAN channel, the heartbeat packet and the data of the second slave node forwarded by the active master node to the standby network when the active master node detects in the active network the heartbeat packet and the data transmitted by the second slave node through the first CAN channel.