WE CLAIM:
[Claim 1] A train radio communication system, comprising:
a mobile station device mounted on a train;
a central station device disposed on the ground; and
a base station device to forward a message transmitted from the central station device to the mobile station device and forward a message transmitted from the mobile station device to the central station device, the base station device being disposed on the ground,
wherein the base station device switches a forwarding destination of the message transmitted from the central station device to a peer device for a test when the central station device is tested.
[Claim 2] The train radio communication system according to claim 1,
wherein communication between the mobile station device and the base station device is performed via radio communication, and
communication between the central station device and the base station device and communication between the base station device and the peer device are performed via wired communication.
[Claim 3] The train radio communication system according to claim 1 or 2,
wherein when the central station device is tested, the central station device transmits, to the base station device, a message with an identifier indicating that a destination is the mobile station device or the peer device, and the base station device switches the forwarding destination of the message received from the central station device, according to the destination indicated by the identifier of the message.
[Claim 4] The train radio communication system according to claim 3,
wherein the base station device forwards the message transmitted from the central station device to the mobile station device even when the central station device is tested.