Controlling transmit power of uplink sounding reference signal

1. A method of controlling a transmit power of an uplink sounding reference signal (SRS) in user equipment, the method comprising:

receiving offset information indicating a specific offset value for an uplink SRS transmit power, from a transmission/reception point, wherein the specific offset value is determined using a constant step size in an entire range including a first range and a second range, the first range is a base range, and the second range includes comparatively larger values than the first range; and

transmitting the uplink SRS with the uplink SRS transmit power based on the specific offset value indicated by the offset information,

wherein

when a parameter Ks defined by a higher-layer signaling of the transmission/reception point is 1.25, the entire range is [−3, 28] dB, the first range is [−3, 12] dB, the second range is (12, 28] dB, and the constant step size is 1 dB; and

when the parameter Ks=0, the entire range is [−10.5, 28.5] dB, the first range is [−10.5, 12] dB, the second range is (12, 28.5] dB, and the constant step size is 1.5 dB.

2. The method of claim 1 , wherein the offset information includes:

a first parameter defining the first range using the constant step size; and

a second parameter defining the second range using the constant step size.

3. The method of claim 1 , wherein the uplink SRS is at least one of a periodic uplink SRS and an aperiodic uplink SRS.

4. User equipment comprising:

a receiving unit configured to receive offset information indicating a specific offset value for an uplink SRS transmit power of the user equipment, from a transmission/reception point, wherein the specific offset value is determined using a constant step size in an entire range including a first range and a second range, the first range is a base range, and the second range includes comparatively larger values than the first range;

a control unit configured to determine the uplink SRS transmit power, based on the offset value indicated by the offset information; and

a transmitting unit configured to transmit the uplink SRS with the uplink SRS transmit power determined by the control unit,

wherein

when a parameter Ks defined by a higher-layer signaling of the transmission/reception point is 1.25, the entire range is [−3, 28] dB, the first range is [−3, 12] dB, the second range is (12, 28] dB, and the constant step size is 1 dB; and

when the parameter Ks=0, the entire range is [−10.5, 28.5] dB, the first range is [−10.5, 12] dB, the second range is (12, 28.5] dB, and the constant step size is 1.5 dB.

5. The user equipment of claim 4 , wherein the offset information includes:

a first parameter defining the first range using the constant step size; and

a second parameter defining the second range using the constant step size.

6. The user equipment of claim 4 , wherein the uplink SRS is at least one of a periodic uplink SRS and an aperiodic uplink SRS.