Precise gps device and method using a wireless ap

A precision positioning apparatus, comprising:

• a GPS receiver receiving a satellite signal from a GPS satellite;
• a communication unit capable of communicating with a wireless access point;
• and
• a positioning information correcting unit receiving navigation correction information for the wireless access point from the wireless access point by communicating with the wireless access point and generating precise position information thereof on the basis of the navigation correction information and the satellites' signal.

A precision positioning method by a precision positioning system including a GPS reference station, a wireless access point, and a user terminal, the method comprising:

• generating, by the GPS reference station, navigation correction information for a wireless access point by receiving first satellites' signal from a GPS satellite;
• transmitting, by the GPS reference station, the generated navigation correction information to the wireless access point;
• receiving, by the user terminal, second satellites' signal from the GPS satellite;
• receiving, by the user terminal, the navigation correction information from the wireless access point;
• and
• generating, by the user terminal, precise user position information on the basis of the second satellite signal and the navigation correction information.

A precision positioning method by a user terminal, which includes a GPS receiver and a wireless communication unit, the method comprising:

• receiving first satellites' signal from a GPS satellite;
• receiving navigation correction information for the wireless access point from a near wireless access point capable of performing communication by using the wireless communication unit;
• and
• generating precise user position information on the basis of the first satellite signal and the navigation correction information.