Radio communication system, radio communication method and base station for an enhanced uplink data communication

摘要

A base station (100) includes: a specifying unit (125) configured to specify a decrease target Transmission Time Interval TTI that indicates the TTI in which a sum of already assigned transmission rates is larger than an allowable receiving transmission rate; a selecting unit (126) configured to select, as a decrease target radio terminal, the radio terminal to which the TTI in the decrease TTI is assigned; and a scheduling unit (120a) configured to transmit, to the decrease target radio terminal, transmission rate decrease data that is the transmission rate control data Absolute Grant, AG, or Relative Grant, RG for instructing a decrease of the transmission rate.