Patent ID: 7928840
Filing Date: 2011-04-19
Classification: G08B

Abstract:
1. A method of preventing a loss or theft of a surveillance target including a mobile device using a wireless personal area network (PAN) or a wireless local area network (LAN), the method comprising: receiving via a gateway, mobile device information, location information of the surveillance target, an identifier of the mobile device, and an identifier of a fixed device, wherein the mobile device information is collected by a sensor of the mobile device included in the surveillance target, from the mobile device, and includes at least one of movement information, vibration information, and weight information of the surveillance target, and the location information of the surveillance target is generated using the mobile device information and signal information communicated between the mobile device and the fixed device; determining whether a loss or theft of the surveillance target has occurred by calculating a distance between a first location determined according to previous location information of the surveillance target, and a second location determined according to the received location information of the surveillance target, and by comparing the calculated distance with a permitted distance criterion associated with the surveillance target, wherein the previous location information and the permitted distance criterion are extracted from a database; and providing a pre-registered terminal with alert information including the received location information of the surveillance target when it is determined that the loss or theft has occurred.