Abstract: A method, and a device for its implementation, for locating a transmitter and receiver device, are disclosed. At least one first transmitter and receiver device transmits a request with a predetermined transmission power, this request is received by at least one second transmitter and receiver device with a predetermined receiving power and after successful receipt the second transmitter and receiver device, of which there is at least one, transmits a response signal, with the response signal only being transmitted if the field strength of the transmitted signal in the position of the second transmitter and receiver device exceeds a specific threshold value or is within a threshold range and the threshold value or threshold range is predetermined by the first transmitter and receiver device by transmission to the second transmitter and receiver device.