Patent Document ID: 7720487
Application ID: 11295126
Patent Flag: 1

Claim One:
1. A method of building a service area map of a location service server by using location information of a wireless terminal in a mobile communication network in which at least two heterogeneous wireless network systems are connected to each other through a predetermined network, the method comprising: forming a network service area map in relation to each of the wireless network systems; receiving from the wireless terminal a message providing location information of the wireless terminal, intensity values of signals received from base stations of accessible wireless network systems and an identification of the accessible wireless network systems through a wireless network system selected from among the accessible wireless network systems on the basis of the intensities of signals of the accessible wireless network systems; selecting a reference point closest to the location of the wireless terminal in relation to each of the wireless network systems, based on the location information of the wireless terminal, and storing the intensity value of the signal in a location corresponding to the selected reference point; detecting whether or not an already stored signal intensity value exists in relation to the selected reference point; if the detection result indicates that the already stored signal intensity value does not exist, storing the intensity value of the signal in the message providing the location information; and if the detection result indicates that the already stored signal intensity value exists, obtaining the average value between the already stored signal intensity value and the signal intensity value in the message providing the location information, and storing the average value.