Identification of defect or stolen mobile terminals and prevention of their use

摘要

The present invention relates to a mobile terminal (1) for a wireless telecommunication system, with transmitting means (5) for transmitting identification information identifying the mobile terminal to a base station (10) of the wireless telecommunication system, receiving means (4) for receiving mode change information from the base station (10) depending on the identification information previously transmitted, control means (6) for detecting mode change information received in said receiving means (4) and for changing the mode of the mobile terminal (1) depending on detected mode change information for preventing the use of said mobile terminal (1). The present invention further relates to a network structure for a wireless telecommunication system, with a base station (10) comprising receiving and transmitting means (12, 13) for communicating with one or more mobile terminals (1), and a register means (17) for storing selected identification information identifying a number of selected mobile terminals, whereby the base station (10), upon receiving identification information from a mobile terminal (1), supplies said received identification information to the register means (17), which compares the received identification information with the selected identification information at outputs a corresponding control signal to the base station (10) in case that the received identification information is contained in the selected identification information, whereafter the base station (10) transmits mode change information to said mobile terminal (1) for preventing the use of said mobile terminal. The present invention provides a simple and effective way for preventing the use of selected mobile terminals, e. g. stolen or technically defect mobile terminals, in a wireless telecommunication system. <IMAGE>