Wireless LAN system for underground railroad

The present invention relates to a wireless LAN service system for a subway that can execute a stable wireless LAN service with respect to the moving object that is moved at a high speed through an underground tunnel, such as subway. In the present invention, the hub 21 is provided one for each subway station, a plurality of remote devices 25 are installed on the interval between the tunnel history. That is, the wireless LAN service terminal number of the remote device 25 from a history that is associated with one of the hub 21 to the next history is for example arranged in a 100m distance, each of these remote device 25 over the same frequency channel, It is executed with the RF communication device. The wireless LAN service terminal equipment and then herbs (21 during the long period of the next history from a history of being able to get continuous wireless LAN services without roaming operation, followed in the next history relatively long time, which is the subway stop ) because a roaming service is run reliably to be able to receive a seamless wireless LAN services. Wireless LAN, the remote device, the relay device