A communication method in a radio communication network in which a radio relay station is provided between a plurality of communication terminals (300-1, 300-2) and a plurality of radio base stations (103-1, 103-2), and relays communication between a communication terminal (300-1 or 300-2) and a radio base station(103-1 or 103-2), said method comprising: when an uplink data from the communication terminal has been received at the radio relay station , sending an uplink scheduling request signal from the radio relay station to the radio base station with timing information, which indicates a first timing at which a first grant signal, corresponding to the uplink scheduling request signal, can be received and a second timing at which an uplink buffer status reporting signal can be sent; when the first grant signal has been received according to the first timing, sending the uplink buffer status reporting signal based on the second timing from the radio relay station to the radio base station with timing information, which indicates a third timing at which a second grant signal, corresponding to the uplink buffer status reporting signal, can be received and a fourth timing at which the uplink data can be sent; and when the second grant signal has been received according to the third timing, sending the uplink data based on the fourth timing from the radio relay station to the radio base station , wherein the first timing and the third timing are timings which do not affect reception processings in the radio relay station for another communication performed at the same time, and wherein the second timing and the fourth timing are timings which do not affect transmission processings in the radio relay station for another communication performed at the same time. when an uplink data from the communication terminal has been received at the radio relay station , sending an uplink scheduling request signal from the radio relay station to the radio base station with timing information, which indicates a first timing at which a first grant signal, corresponding to the uplink scheduling request signal, can be received and a second timing at which an uplink buffer status reporting signal can be sent; when the first grant signal has been received according to the first timing, sending the uplink buffer status reporting signal based on the second timing from the radio relay station to the radio base station with timing information, which indicates a third timing at which a second grant signal, corresponding to the uplink buffer status reporting signal, can be received and a fourth timing at which the uplink data can be sent; and when the second grant signal has been received according to the third timing, sending the uplink data based on the fourth timing from the radio relay station to the radio base station , wherein the first timing and the third timing are timings which do not affect reception processings in the radio relay station for another communication performed at the same time, and wherein the second timing and the fourth timing are timings which do not affect transmission processings in the radio relay station for another communication performed at the same time. <EOS>