Patent ID: 9171449
Filing Date: 2015-10-27
Classification: G08B,H04W

Abstract:
1. A method for sending an alarm, comprising: generating an alarm code in a first terminal unit, the alarm code comprising at least coordinate information representative of a location of the first terminal unit; sending an alarm comprising the alarm code from the first terminal unit to a second terminal unit, which second terminal unit is determined by a first contact register associated with the first terminal unit; and receiving the alarm in the second terminal unit, wherein the alarm is provided to a third terminal unit, the third terminal unit being determined by a second contact register associated with the second terminal unit, and wherein the alarm is provided to a fourth terminal unit for activating an alarm indication in the fourth terminal unit if the fourth terminal unit is located within a predetermined distance from the first terminal unit, the fourth terminal unit being determined by a third contact register associated with the third terminal unit.