Patent ID: 7957260

Claim:
A WiMAX system analyzer having a Radio Access Station (RAS), comprising: a clock counter for creating a frame number by sequentially increasing a number by one at intervals, each interval corresponding to a length of a frame of a WiMAX; a Digital to Analog (D/A) conversion unit for converting a DL sub-frame into an analog signal; an Analog to Digital (A/D) conversion unit for converting a UL sub-frame signal into digital data; a Radio Frequency (RF) processing unit for RF-modulating the D/A-converted DL sub-frame, outputting the modulated DL sub-frame to a Portable Subscriber Station (PSS), and demodulating a modulated Uplink (UL) sub-frame received from the PSS; switching means for selectively connecting the RF processing unit to the D/A conversion unit or the A/D conversion unit; a signal generation unit for assigning a Connection Identifier (CID) to the PSS by performing a previously defined network entry process in conjunction with the PSS, and creating a DL sub-frame by encoding DL data having the frame number, generated by the clock counter, and the CID information; a signal analysis unit for decoding the UL sub-frame obtained through the conversion of the A/D conversion unit, and conducting various analyses on the UL sub-frame; and control means for controlling overall operation of the WiMAX system analyzer and performing control so that the switching means connects to the A/D conversion unit when a predetermined time period has elapsed after the switching means is connected to the D/A conversion unit.