Patent ID: 8462886

Claim:
A mobile wireless terminal device configured to wirelessly communicate with a base station accommodated in a network, the device comprising: a receiver configured to receive a wireless signal transmitted by the base station, to frequency-convert the received wireless signal to obtain a reception signal, and to detect a beacon transmitted by the base station based on the reception signal obtained by frequency conversion; and a communication module configured to start in accordance with detection of the beacon by the receiver, to decode the reception signal, to acquire identification information of the base station, and to communicate with the base station, wherein the receiver comprises: an accumulation module configured to accumulate reception levels of a sampling signal of the reception signal for reception timings over a predetermined period to obtain a reception profile; a correlation module configured to detect a shift amount which maximizes a correlation between a present reception profile obtained by the accumulation module and a past reception profile obtained by the accumulation module while shifting the past reception profile over time axis; a first detector configured to detect the beacon, when a difference between the shift amount detected by the correlation module and a default amount is larger than a predetermined amount, in accordance with a difference between a shifted profile obtained by shifting the past reception profile over the time axis by the default amount and the present reception profile; and a second detector configured to detect the beacon, when the difference is not larger than the predetermined amount, in accordance with a difference between a shifted profile obtained by shifting the past reception profile over the time axis by the shift amount and the present reception profile.