Patent ID: 8249633
Filing Date: 2012-08-21
Classification: H04W

Abstract:
1. A radio communication system in which a radio terminal transmits uplink user data to a base station via an enhanced dedicated physical data channel in a transmission time interval assigned to the radio terminal, 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 specifying unit configured to specify a decrease target transmission time interval that indicates the transmission time interval in which a sum of already assigned transmission rates is larger than an allowable receiving transmission rate; a selecting unit configured to select, as a decrease target radio terminal, the radio terminal to which the transmission time interval in the decrease target transmission time interval is assigned; and a transmitting unit configured to transmit, to the decrease target radio terminal, transmission rate decrease data that is the transmission rate control data for instructing a decrease of the transmission rate, and the allowable receiving transmission rate is not larger than a maximum receiving transmission rate that can be assigned by the base station.