The invention seeks to provide a communication system, a data transmitting device, a communication device, and a communication method capable of exchanging a sufficient capacity of data in a simple configuration without reducing the speed of a vehicle. The invention provides a communication system for transmitting data by a data transmitting device provided on a route of a moving body to the moving body having a plurality of vehicles in one formation; each of the plurality of vehicles being provided with a receiving unit that receives data transmitted from the data transmitting device; and the data transmitting device being configured to transmit mutually different data to the receiving units of the plurality of vehicles. The moving body may be a train such as the Shinkansen, or a transport vehicle such as a truck to which a plurality of cargo vehicles are connected.

An on-board apparatus to be installed on a train, the apparatus including; an on-board control device that controls running and stopping of the train during operation of the train; and an on-board wireless device that performs wireless communication with a ground apparatus, and starts the on-board control device when receiving a first signal from the ground apparatus while the train is staying overnight, the first signal notifying that the train moves, wherein while the train is staying overnight, the on-board control device is started under the control of the on-board wireless device, and performs control so as to stop the train.

An on-board apparatus to be installed on a train, the apparatus including; an on-board control device that controls running and stopping of the train during operation of the train; and an on-board wireless device that performs wireless communication with a ground apparatus, and starts the on-board control device when receiving a first signal from the ground apparatus while the train is staying overnight, the first signal notifying that the train moves, wherein while the train is staying overnight, the on-board control device is started under the control of the on-board wireless device, and performs control so as to stop the train.

This system (210) comprises an antenna (20) comprising a first loop (22) and a second loop (24) having different radiation patterns, the first and second loops being designed to generate first and second currents (I1, I2) when the antenna passes over a beacon situated on the line and an electronic processing subsystem designed to generate a location signal from said first and second currents. It is characterized by said subsystem being a first subsystem (230) for generating a first location signal (SL1), the system comprises a second subsystem (240) for generating a second location signal (SL2) from said first and second currents, and by said subsystem comprising an arbitration means (250) designed to generate a safety location signal (SLS) according to said first and second location signals.

This system (210) comprises an antenna (20) comprising a first loop (22) and a second loop (24) having different radiation patterns, the first and second loops being designed to generate first and second currents (I1, I2) when the antenna passes over a beacon situated on the line and an electronic processing subsystem designed to generate a location signal from said first and second currents. It is characterized by said subsystem being a first subsystem (230) for generating a first location signal (SL1), the system comprises a second subsystem (240) for generating a second location signal (SL2) from said first and second currents, and by said subsystem comprising an arbitration means (250) designed to generate a safety location signal (SLS) according to said first and second location signals.

A train control system of the present invention capable of controlling a train in a plurality of drive modes by a single on-board device, includes an on-board device 4 mounted on a train 2 traveling on a predetermined track 1; a continuous ATP processing unit 11 and an intermittent ATP processing unit 10 that is provided in the on-board device 4 and simultaneously performs processes in a continuous ATP drive mode by a continuous ATP system and an intermittent ATP drive mode by an intermittent ATP system; and a drive mode determining unit 12 that selects either one of process results to be used in a travel control, of the continuous ATP processing unit 11 and the intermittent ATP processing unit 10.

In order to identify a fault location, a fault detection method in which a base station installed in each of a plurality of sections of a route, an antenna which is connected to the base station and installed along the route, and a control device which controls all the base stations installed along the route are used comprises: measuring a strength of a signal emitted from the antenna in at least one mobile body in operation; acquiring a temporary failure determination result based on the signal strength, transmitting announcement information by the control device via the base station and the antenna to which it is determined that a failure occurs when the temporary failure determination result is acquired, transmitting an answer to the control device by the arbitrary mobile body in operation and receives the announcement information, and making a final failure determination based on the answer transmitted from each mobile body in the control device.

A sensing system includes a leading sensor, a trailing sensor, and a route examining unit. The leading sensor is onboard a first vehicle of a vehicle system that is traveling along a route. The leading sensor measures first characteristics of the route as the vehicle system moves along the route. The trailing sensor is disposed onboard a second vehicle of the vehicle system. The trailing sensor measures second characteristics of the route as the vehicle system moves along the route. The route examining unit is disposed onboard the vehicle system and receives the first characteristics of the route and the second characteristics of the route to compare the first characteristics with the second characteristics. The route examining unit also identifies a segment of the route as being damaged based on a comparison of the first characteristics with the second characteristics.

A train control device includes an on-vehicle base station mounted on a train, base stations that can communicate with the on-vehicle base station, an on-vehicle control device controlling an operation such that the train can stop before reaching a stop limit before which the train can run safely, and ground control devices that transmit, to the train side, the stop limit calculated based on information on the current position acquired from the train side via the base stations and opening information on a turnout on the ground. The on-vehicle control device calculates a channel-reservation start pattern, which is a pattern determining a reservation start position of a communication channel of a base station as a switching target when the base station as a communication partner to the on-vehicle base station is switched and in which the reservation start position is different according to train speed and train position.

A train control device includes an on-vehicle base station mounted on a train, base stations that can communicate with the on-vehicle base station, an on-vehicle control device controlling an operation such that the train can stop before reaching a stop limit before which the train can run safely, and ground control devices that transmit, to the train side, the stop limit calculated based on information on the current position acquired from the train side via the base stations and opening information on a turnout on the ground. The on-vehicle control device calculates a channel-reservation start pattern, which is a pattern determining a reservation start position of a communication channel of a base station as a switching target when the base station as a communication partner to the on-vehicle base station is switched and in which the reservation start position is different according to train speed and train position.