Method and device for easy contact between parents and children uses a mobile telephone network to transmit both ways to remind a child of its duty to send a signal, or, just one way from child to parent regarding child's whereabouts

摘要

A mobile telephone radio network allows transmissions in both directions to remind a child of its duty to send a signal, or, just a one-way transmission from child to parent as a simplified alternative. Using a child's wristwatch with a direction-finding transmitter for modern satellite navigation systems makes it possible to tell parents about a child's movements at any time and to recall these later from a database.