Patent ID: 7280521

Claim:
An access point apparatus for a terminal locating system for determining a location of a terminal on the basis of a reception timing at which a radio packet signal sent from said terminal is received at said point apparatus, said access point apparatus comprising: a signal receiving unit for receiving said radio packet signal to thereby generate a received signal; a received signal memory for storing said received signal; a packet detecting unit for detecting a packet contained in said generated received signal; a received signal memory control unit for performing a received signal write control for writing said received signal in said received signal memory from said signal receiving unit and a read control for reading out said received signal from said received signal memory; and a clock unit for associating said received signal and a reception timing in said access point apparatus, wherein said received signal memory control unit is so arranged as to perform such control that said received signal is written in said received signal memory at addresses sequentially from a first address; after writing of said received signal in said received signal memory at a second address, writing of said received signal continues in said received signal memory sequentially from said first address; and writing of said received signal in said received signal memory is stopped in response to detection of the packet contained in said received signal by said packet detecting unit, and wherein said radio packet signal reception timing is determined on the basis of said readout received signal and the associated reception timing in said access point apparatus.