Patent ID: 9603169
Date: 2017-03-21
CPC Classifications: H04L,H04W

Claim:
1. A method of receiving a sounding reference signal (SRS) by a base station, the method comprising: transmitting, to User Equipment (UE), at least one parameter set comprising an antenna configuration and a transmission bandwidth configured to transmit an aperiodic sounding reference signal (A-SRS) by Radio Resource Control (RRC) signaling; generating a radio control signal for a Downlink Control Signal (DCI) Format 4 comprising 2-bits or 3-bits of information instructing the UE to transmit the A-SRS in a radio resource area and indicating one of the at least one parameter set; transmitting, to the UE, the radio control signal; and receiving the A-SRS in the radio resource area by the indicated parameter set including the antenna configuration and the transmission bandwidth, wherein the 2-bits or 3-bits of information indicate A-SRS activation state or no activation state, and state ‘0’ of the 2-bits or 3-bits of information indicates the no A-SRS activation state, state ‘1’ of the 2-bits or 3-bits of information indicates a first parameter set of the A-SRS activation state, state ‘2’ of the 2-bits or 3-bits of information indicate a second parameter set of the A-SRS activation state, and state ‘3’ of the 2-bits or 3-bits of information indicates a third parameter set of the A-SRS activation state.