A data network of a device, in particular a vehicle, has a set of device-internal nodes, at least one ring in which ring-internal nodes of the set are networked in a ring topology, and at least one interface unit for establishing a connection between at least one ring-external node and the ring. A generic data network has at least one ring and enables secure operation and simple management that can be used flexibly. The data network has a filtering device with at least one filter function, for filtering data traffic of the ring with respect to at least one node identifier, and an identification device for implementing at least one measure for a ring-external node, the measure relating to a node identifier of the node, such that the node identifier is permitted by the filter function for a data traffic in the ring.

A data communication system is configured to obtain operational data associated with a control system of a vehicle consist. The operational data is obtained at a first vehicle of the consist. The operational data is communicated from the first vehicle to one or more second vehicles in the consist. Responsive to a loss of the operational data at the first vehicle, at least the operational data that was lost at the first vehicle can be communicated from one or more of the second vehicles to the first vehicle. Onboard the first vehicle, an operational capability of the consist to perform a movement event can be determined using the operational data that was lost at the first vehicle and that was communicated from the at least one of the one or more second vehicles to the first vehicle.

The present application relates to the technical field of field bus communication, and in particular to a protocol converter between a CPCI bus and an ISA bus and a conversion method thereof, which are suitable for communication between railway vehicle CPUs and vehicle bus MVB devices. The protocol converter comprises a CPCI local bus interface extension timing module, an ISA bus interface timing module, a CPCI bus matching ISA bus timing interface module, and a clock management module. The CPCI bus realizes communication with the ISA bus by the protocol converter. The traditional conversion bridge chips are replaced with the protocol converters without changing the traction controller structure and other devices in the system; the flexibility is high; and the functions are diverse. In addition, 8-bit data width or 16-bit data width of the ISA bus is supported, and the operation of an ISA bus device by a CPCI bus device in the form of IO or in the form of MEMORY is supported.

A method for implementing a real-time soft bus oriented to an intelligent rail transit system includes: defining a data type for interaction between a server and a communication front-end processor, where the defined data type is a message structure body which includes a message header and a message body; enabling professional subsystems to construct at least one publisher entity and/or at least one subscriber entity, respectively, where the data type of the communication between the publisher entity and the subscriber entity corresponding thereto is a message structure body. The subsystems choose to subscribe to the data of its interest, or to publish the data that it can provide.

To provide a network system including a network constructed by combining a plurality of switching devices. The network includes a first partial network including switching devices and a second partial network that is formed outside the first partial network and includes switching devices. The switching device in the first partial network connected to the second partial network blocks passage of a broadcast signal that is transmitted from a terminal device and that has a specific logical port number as transmission information at a physical port.

The present invention relates to the field of communications on rail trains. A PicoBlaze-based MVB controller includes a pMVB controller, a traffic memory, an ARM adapter, and a bus arbiter. The pMVB controller, the traffic memory, ARM adapter, and the bus arbiter are connected to an external bus BUS1. The pMVB controller is connected to the traffic memory. The ARM adapter is connected to an external ARM processor and the bus arbiter. The traffic memory can store network communication data and input control information, and send them to the pMVB controller. The pMVB controller responds to the control information, and sends the communication data, and after it is encoded, to the MVB bus via the external bus BUS1. The pMVB controller also decodes data received from the pMVB bus and triggers an interrupt. The bus arbiter is responsible for bus arbitration in accordance with the instructions from the pMVB controller.

The present invention discloses a LPC2468-based MVB-WTB gateway and associated operating methods in the field of train communications. The disclosed network gateway includes a MVB network card and a WTB network card. The WTB network card includes WTB-ARM and a WTB-FPGA module. The MVB network card includes MVB-ARM and MVB-FPGA module. The WTB-ARM module uses a LPC2468 processor to analyze data in the network layer and the data link layer based on gateway protocol. The WTB-FPGA module allows WTB to exchange data with other networks gateways, as well as between the WTB and MVB. The MVB-ARM module is responsible for executing protocols on the network cards. Via data communications on MVB, the MVB-FPGA module collects the process and message data of the MVB equipment, and exchange communication data between WTB within a network gateway. The present invention can increase speed and enhance reliability for communications between gateways.

A test information management system includes: a train information processing apparatus that transmits and receives, in a first intra-train network, data to and from a vehicle device in a second intra-train network and manages an operation of the vehicle device; and a test information management apparatus that includes a device model execution unit capable of executing processing identical to processing executed by the train information processing apparatus and the vehicle device, and performs control to distribute data transmitted from a transmission source of the data or data obtained by the device model execution unit to a transmission destination of the data, based on a communication state between the train information processing apparatus and the vehicle device.