Mitsubishi Electric Corporation

Yusuke Ishimaru

Takashi Miyauchi

Shogo Tatsumi

Shingo Honda

Tetsuo Komura

Toshiko Kadono

Takuya Sawa

A communication device operating as a hub in a train network system that includes a plurality of hubs installed in train vehicles, each of the plurality of hubs belonging to both a trunk network in which a signal transmission range is not limited and a branch network in which a signal transmission range is limited, and adding, to a signal to be transmitted to a hub belonging to the same branch network as it does, network type information indicating whether the signal is a trunk network signal or a branch network signal. The communication device transmitting branch network information including at least identification information on a branch network to which it belongs at a predetermined timing, and based on branch network information received from an adjacent communication device, determining whether or not to add the network type information to a signal to be transmitted to the adjacent communication device.

Communication device, train network system, and network setting method

A train-information managing apparatus receives a series of control information attached to serial numbers, which are transmitted from a central apparatus, in order of the transmission and carries out control in the order, and even when the central apparatus is changed or the serial numbers are reset, prevents a blank period of control from occurring. Therefore, when a reception serial number n included in received data is a preferential serial number (n&#x2266;M) and an old number n, which is a serial number included in data received and stored last time, is a cyclic serial number (n&#x2267;M+1), the train-information managing apparatus stores the received data.

Train-information managing apparatus

Growing community of inventors

Tokyo, Japan

Yusuke Ishimaru