Patent ID: 7057557

Claim:
A position estimating method comprising: determining a first position of a mobile communication terminal using an arrival angle of a first signal at each of a plurality of base stations; determining a second position of the mobile communication terminal using an arrival angle of a second signal at each of a plurality of base stations; determining a third position of a mobile communication terminal using a time difference of a third signal at each of a plurality of base stations; determining a fourth position of the mobile communication terminal using a time difference of a fourth signal at each of a plurality of base stations; and determining an expected present position of the mobile terminal based on the determined first position, the determined second position, the determined third position and the determined fourth position, wherein determining the expected present position includes: forming a first virtual line connecting graphical coordinates of the first position and the second position; forming a second virtual line connecting graphical coordinates of the third position and the fourth position; and determining the expected present position by selecting one of the first virtual line and the second virtual line.