Patent ID: 7818016
Filing Date: 2010-10-19
Classification: G08B,H04M

Abstract:
1. A system for providing a location-based alert service to generate an alert upon monitoring a location of a mobile client relative to an alert zone, comprising: a client for inputting a location alert generation condition for using the location-based alert services; a location-based alert server for receiving location information on the mobile client to minimize the number of location inquiries using a moving distance ratio and a moving direction of the mobile client; a location information DB for receiving and storing the location information on the mobile client from the location-based alert server; and a location alert service server for receiving and storing the location alert generation condition from the client, and determining whether the mobile client exists in an alert range set by the client by receiving a location data of the mobile client from the location-based alert server to thereby generate an alert, wherein the location-based alert server increases or decreases a time interval for requesting the next location of the mobile client by comparing previous and current distances between the mobile client and the alert zone and determining a moving direction of the mobile client, wherein the location-based alert server generates a buffer zone corresponding to an arbitrary distance with respect to an alert zone, and sets the time interval for inquiring the next location of the mobile client as an initial location inquiry time interval if the mobile client enters the buffer zone, wherein the location-based alert server increases or decreases a time interval for requesting the next location with respect to a plurality of mobile communication terminals and the plurality of alert regions in a process of a method used by mixing methods for minimizing the number of location inquiries through the moving distance ratio of the mobile client and the previous and current distances between the mobile client and the certain zone, and through the increase/decrease ratio of areas between a Minimum Bounding Rectangle (“MBR”) for the current moving location of the mobile client and the MBR up to the location having obtained at the previous time.