COMMUNICATION TERMINAL DEVICE, METHOD FOR ACQUIRING POSITION INFORMATION BY COMMUNICATION TERMINAL DEVICE, AND PROGRAM PRODUCT FOR CONTROLLING COMMUNICATION TERMINAL DEVICE

摘要

A communication terminal device is provided to acquire assist data without making an information providing device to transmit the assist data complicated in structure. A communication terminal device (100) carries out processing including a step (S716) for storing an acquired identifier at a buffer region (430) of an assistant data acquiring base station and a buffer region (410) of a waiting base station, a step (S724)for acquiring an identifier for a wireless base station from a received signal and for storing it at a RAM (346), a step (S732) for storing an identifier after change for the wireless base station at a buffer region of the waiting base station, and a step (S742) for storing an identifier stored at the waiting base station at a buffer region of the assist data acquiring base station in the case (NO at a step (S740)) that the identifier stored at the buffer region of the waiting base station is not stored at the buffer region of the assist data requiring base station.