Mobile terminal, method of computing absolute coordinates of wireless AP by mobile terminal, and system of computing absolute coordinates of wireless AP using mobile terminal

A method for computing absolute coordinates of wireless access points (APs) at a mobile terminal, the method comprising:

• collecting at least three absolute coordinates of a main body of the mobile terminal from at least three different locations;
• computing relative distance information between the wireless APs and the main body by using radio signals transmitted from the wireless APs to the main body;
• detecting at least three relative coordinates of the main body by using the relative distance information and pre-set relative coordinates of the wireless APs;
• computing a conversion parameter for converting the detected at least three relative coordinates of the main body into the at least three absolute coordinates, each of the at least three absolute coordinates of the main body respectively corresponding to one of the at least three relative coordinates of the main body;
• and
• computing absolute coordinates of the wireless APs by using the conversion parameter,
• wherein the conversion parameter is a matrix having a size corresponding to a number of the absolute coordinates of the main body.

A system for computing absolute coordinates of wireless access points (APs), the system comprising:

• a mobile terminal;
• a location information unit collecting at least three absolute coordinates of the mobile terminal;
• a distance information unit computing relative distance information between the wireless APs and the mobile terminal by using radio signal information received by the mobile terminal from the wireless APs;
• a relative coordinates unit detecting at least three relative coordinates of the mobile terminal by using the relative distance information and pre-set relative coordinates of the wireless APs;
• and
• a controller:
• computing a conversion parameter for converting the detected at least three relative coordinates of the mobile terminal into the at least three absolute coordinates, each of the at least three absolute coordinates of the mobile terminal respectively corresponding to one of the at least three relative coordinates of the mobile terminal;
• and
• computing absolute coordinates of the wireless APs by using the conversion parameter,
• wherein the conversion parameter is a matrix having a size corresponding to a number of the absolute coordinates of the mobile terminal.