In a mobile network at least one direct communication channel between mobile stations is provided. The direct communication channel is used by a mobile station (MS 1) for broadcasting periodical emergency data messages, within near vicinity and to other mobile devices, which comprise means for estimating distance and/or direction to the this mobile station. In particular, for evaluating signal strength and/or other properties of the emergency signal where different emergency signals are provided differing in amplitude, frequency and/or pattern and where these emergency signals can be received by other mobile stations (MS2) or by network antennas (TRX1) or by special localization equipments (MSTRACK, 5,6,7) in such a way that the signal is used for localizing the first mobile station (MS1) to a high precision.