METHOD AND SYSTEM OF WIRELESS DATA TRANSFER UNDER EARTH BETWEEN A LESSER MEASURE OF ONE MOBILE STATION AND A STATIONARY NETWORK BY MEANS OF A RADIO COMMUNICATION NETWORK

摘要

The invention relates to a method and system (1) for wireless data transmission underground between at least one mobile station (2) and a fixed network (4) via a radio communication network (4a), preferably using a WLAN in accordance with IEEE 802.11, in particular for monitoring and controlling vehicles moving underground (3). The fixed network (4) contains a number of fixed base stations (6) made as access points, each base station (6) being connected to the fixed network (4) via at least one data connection (7), preferably by cable . Each base station (6) and the mobile station (2) contain a transceiver device, while data transmission between the mobile station (2) and the fixed network (4) is carried out using wireless communication over the radio communication network (4a) through at least one base station (6). According to the invention, if the connection (7) for data transmission between the fixed network (4) and the base station (6) is broken and / or when the radio connection between the mobile station (2) and the base station (6) is lost, data transfer between the mobile station (2) and a fixed network (4) is provided through a separate base station (6) and at least one additional base station (6) connected to the fixed network (4) via an unbroken connection (7) for data transmission. The invention relates to a method and system linking the infrastructure functions and application functions in the most optimal way for use underground.