Patent ID: 7751828

Claim:
A communication device that connects with a network through a wireless local area network (WLAN) access point to receive data, the communication device comprising: a GPS receiving module for receiving position information of the connection device from a GPS satellite; a WLAN module for connecting with the WLAN access point; a storage unit for storing position information of the WLAN access point; and a controller for selectively operating the WLAN module based on the position information of the communication device output from the GPS receiving module and the position information of the WLAN access point stored in the storage unit, wherein the controller receives new WLAN access point position information after receiving a “Position Information Renewal” message from a position information server according to checking result of version information on the WLAN access point position information, and renews the stored position information, and where in the controller receives a “New Position Information Verification” message from the position information server of the “Position Information Renewal” message or a “No New information” message, receiving a new position information of the WLAN access point from the position information server in the case where the communication device receives the “Position Information Renewal” message, and performing processes to renew the position information; and the position information server checking version information of WLAN access point position information that the communication device has from the “New Position Information Verification” message, transmitting the “Position Information Renewal” message to the communication device in the case where a first version of the WLAN access point position information that the communication device has is older than a second version of present WLAN access point position information; transmitting the “No New Information” message to the communication device if the first version is identical to the second version; and transmitting the new WLAN access point position information corresponding to the second version to the communication device after the “Position Information Renewal” message is sent.