Patent ID: 7236126

Claim:
An AGPS (Assisted Global Positioning System) system using a NTP (Network Time Protocol) server in a wireless LAN, which comprises: a terminal for sending an AGPS data requesting message and a time information requesting message using a wireless LAN and for determining a current location based on AGPS data and time information received in response to the requesting messages; an access point for analyzing messages for the position determination entity and the time information received from the terminal, delivering the message to a corresponding server according to results of the analysis and for delivering a message received from the server to the terminal; a position determination entity for generating AGPS data in response to the AGPS data requesting message received from the access point and for providing the generated AGPS data to the access point; and another separate NTP server for generating synchronized time information in response to the time information requesting message received from the access point and providing the generated time information to the access point.