the present invention provides a method of user equipment transmitting aperiodic channel state information and user equipment using the method . the method includes receiving a channel state information request for a plurality of reference signals , receiving the plurality of reference signals , generating channel state information on each of the plurality of reference signals in response to the channel state information request , and transmitting the channel state information through a physical uplink shared channel , wherein the channel state information request is included in only some of subframes in which the plurality of reference signals is received .