Positioning device of mobile communication terminal, method for constructing wireless LAN information of device, positioning server of mobile communication terminal, and method for driving server

A positioning server, comprising:

• a memory unit configured to store:
• wireless LAN information of a plurality of access points configured to perform local wireless LAN communications with a mobile communication terminal,
• wireless environment information of a node in charge of communications of the mobile communication terminal,
• positioning information received from the mobile communication terminal, wherein the positioning information comprises information of an access point among the plurality of access points, said access point performing wireless LAN communication with the mobile communication terminal, and
• a comparative value;
• a calculation unit configured to calculate
• a distance between the access point and the node, based on the wireless LAN information of the access point and the wireless environment information of the node;
• and
• a mobility determination unit configured to:
• determine whether or not pieces of information of the access point respectively included in the positioning information and the wireless LAN information are matched with each other,
• compare, when the pieces of information of the access point respectively included in the positioning information and the wireless LAN information are matched with each other, the calculated distance with the comparative value, and
• delete the wireless LAN information of the access point from the memory unit when the calculated distance is greater than or equal to the comparative value,
• wherein
• the wireless LAN information comprises latitude and longitude coordinates of the access point,
• the wireless environment information comprises latitude and longitude coordinates of the node, and
• the calculation unit is configured to calculate the distance between the access point and the node by comparing the latitude and longitude coordinates of the node and the latitude and longitude coordinates of the access point.

A method for establishing, by a positioning server, wireless LAN information of a plurality of access points, the method comprising:

• collecting wireless LAN information of the plurality of access points for performing local wireless LAN communications with a mobile communication terminal, and storing the collected wireless LAN information in a database;
• requesting the mobile communication terminal to perform positioning, and receiving positioning information of the mobile communication terminal from the mobile communication terminal, wherein the positioning information comprises information of an access point among the plurality of access points, said access point performing wireless LAN communication with the mobile communication terminal;
• requesting wireless environment information of a node in charge of communications of the mobile communication terminal, and receiving the wireless environment information;
• determining whether wireless LAN information of the access point is included in the collected wireless LAN information of the plurality of access points;
• when the wireless LAN information of the access point is included in the collected wireless LAN information of the plurality of access points, calculating a distance between the node and the access point, based on the wireless LAN information of the access point, and the wireless environment information of the node;
• determining whether the calculated distance is greater than or equal to a predetermined distance;
• and
• deleting the wireless LAN information of the access point stored in the database from the database when the calculated distance is determined to be greater than or equal to the predetermined distance,
• wherein
• the wireless LAN information comprises latitude and longitude coordinates of the access point,
• the wireless environment information comprises latitude and longitude coordinates of the node, and
• the calculation unit is configured to calculate the distance between the access point and the node by comparing the latitude and longitude coordinates of the node and the latitude and longitude coordinates of the access point.