Patent ID: 7974658

Claim:
A system for subterranean wireless data transmission between at least one mobile station and a fixed network by means of a radio network, wherein the fixed network comprises a number of fixed base stations each base station being connected to the fixed network by means of at least one data transmission connection, or directly to an optical waveguide network, wherein each base station and the mobile station in each case comprise at least one transceiver device and the data transmission between the mobile station and the fixed network is effected wirelessly in the radio network via at least one base station, wherein the system comprises at least one additional device for handling underground-specific network or application functionality, and wherein the base station can be used at the same time as the fixed station for including said additional device in order to couple sensor data from an underground process, transmitted by wire or wirelessly, to the network wherein in the case of an interruption of a power supply to the base station, a network-independent power supply is provided and wherein immediately after an interruption of the power supply to a base station in an emergency mode, identification data and/or position data of at least one mobile station located within radio range of the base station before and/or after the interruption of the power supply are determined and transmitted to the fixed network by the base station.