Patent ID: 8682582

Claim:
A radiodetermination apparatus, comprising: a GPS signal receiving part receiving a GPS signal from GPS satellites; a PM determination part configured to determine a positioning mode corresponding to a specific situation from positioning modes of a Cell ID positioning mode, a stand-alone GPS positioning mode and an AGPS positioning mode when the specific situation occurs; and a PI generating part configured to: generate location information by performing a cell ID positioning for a predetermined first period or in real-time according to whether the specific situation is a predefined periodic positioning situation or a predefined real-time positioning situation in the case of the cell ID positioning mode, generate location information by performing a stand-alone GPS positioning for a predetermined second period in the case of the stand-alone GPS positioning mode, and generate location information by performing a real-time AGPS positioning in the case of the AGPS positioning mode, wherein the PM determination part determines the positioning mode corresponding to a failure situation as the cell ID positioning mode when the GPS signal is not received by the GPS signal reception part.