Menetelmä kannettavan päätelaitteen käyttämiseksi mobiilissa tiedonkeruujärjestelmässä

摘要

In a method of operation of a terminal device in a mobile system, the terminal device (Ln) is kept dominantly in a deep rest state (P 0 ) for minimizing the current consumption and means and functions for making the terminal device to operate as a terminal device in a mobile communication network are activated (CL) for short periods (tc 1 ) for sending (R) or receiving (H) data, and the activation and operation of the terminal device for sending and receiving data is controlled individually by control data which is sent to the terminal device via the mobile communication network ( 24 ). The centralized and at the same time individual control of the terminal devices makes it possible to apply the mobile system to many purposes. The current consumption and the communication costs may be minimized and a very high operational dependability be realized in the system.