In a wireless communication system, a wireless transmitter generates a TS packet that includes a PCR value based on a timer value for a time preceding an offset time from start time of a PCR time slot and transfers a wireless frame that includes the TS packet with the PCR value at start time of the PCR time slot. The wireless receiver receives the wireless frame that includes the TS packet with the PCR value at the PCR time slot, measures propagation time of the wireless frame between the start time of the PCR time slot and time when the wireless frame that includes the TS packet with the PCR value is received, obtains sum of the offset time and the propagation time as delay time of the PCR value, and adjusts its timer value based on the PCR value acquired from the wireless frame and the obtained delay time.