Patent ID: 7561890

Claim:
A hotspot location database system comprising: a number of mobile terminals, each mobile terminal comprising: means for communication with a WLAN and detection of the received WLAN signal strength; means for detection of its position; means for storing information about WLAN access points at least including information about positions and coverage in a hotspot location database incorporated in the mobile terminal; and said mobile terminal being configured to: monitor the received WLAN signal strength associated with an access point; store location information about the coverage associated with said access point in said hotspot location database, wherein said system further comprising: means for communication with other mobile terminals using a local connectivity network; and said mobile terminal being configured to: monitor the presence of another mobile terminal within range for communication using the local connectivity network; send a request for hotspot location database update to the other mobile terminal; and receive a hotspot location database update from the other mobile terminal and to update its own hotspot location database.