Patent ID: 8787963

Claim:
A mobile wireless terminal apparatus configured to wirelessly communicate with a base station, the apparatus comprising: a first communication module configured to detect a beacon signal from a wireless signal transmitted from the base station to a service area, and to determine movement into a new service area and movement to an outside of the service area, based on a variation of a reception timing of the beacon signal; a second communication module configured to receive a wireless signal transmitted from the base station and to communicate with the base station by acquiring identification information of the base station from the wireless signal, the second communication module being greater in power consumption than the first communication module; and a controller configured to activate the second communication module and cause the second communication module to acquire the identification information, when the movement to the new service area is determined by the first communication module; wherein the first communication module comprises: a beacon detection module configured to generate a plurality of reception profiles, each profile indicative of the reception timing of the wireless signal in a search window corresponding to a first cycle, to add wireless signals received at the same timing by overlapping the plurality of reception profiles, and to detect reception timings of the beacon signal by detecting added wireless signals exceeding a first value; and a comparison module configured to: compare a first list, comprising the first reception timing detected at a first timing, and a second list, comprising the second reception timing detected at a second timing after the first timing; and determine the movement into the new service area and the movement to the outside of the service area, based on a difference between the first reception timing and the second reception timing.