Patent ID: 8432795

Claim:
A radio communication system in which a radio terminal transmits uplink user data to a base station via an enhanced dedicated physical data channel and in which the base station transmits, to the radio terminal, transmission rate control data for controlling a transmission rate of the uplink user data, wherein the base station comprises: a detecting unit configured to detect a discard of the uplink user data received from the radio terminal; and a scheduling unit configured to count up a discard continuation counter for each predetermined period and to reset said discard continuation counter when the scheduling unit is notified of the discard of the uplink user data, wherein the scheduling unit is configured to transmit transmission rate decrease data being the transmission rate control data instructing a decrease of the transmission rate assigned to the radio terminal, from an occurrence of the discard of the uplink user data until a value of the discard continuation counter reaches a discard continuation threshold.