Method for changing reference signal allocation in environment allowing operation in FDR scheme and device therefor

1. A method for changing reference signal (RS) allocation by an apparatus operating in a Full Duplex Radio (FDR) scheme, the method comprising:

determining whether to release an additionally allocated RS, or to additionally allocate an RS for channel estimation of a nonlinear component of a self-interference signal, according to a change in transmit power of the apparatus;

wherein the determining further comprises:

determining to additionally allocate the RS for the channel estimation of the nonlinear component of the self-interference signal when the transmit power of the apparatus is increased; and

according to the determining, transmitting information on a resource of the additionally allocated RS to be released or information on a resource of the RS to be additionally allocated.

2. The method of claim 1 , wherein the determining further comprises:

determining to release the additionally allocated RS when the transmit power of the apparatus is decreased.

3. The method of claim 1 , wherein the determining according to the change in the transmit power is performed only when the transmit power is greater than or equal to a predefined threshold.

4. The method of claim 1 , wherein the information on the resource of the additionally allocated RS to be released comprises resource position information on the additionally allocated RS to be released.

5. The method of claim 1 , wherein the information on the resource of the RS to be additionally allocated comprises resource position information on the RS to be additionally allocated.

6. An apparatus for changing reference signal (RS) allocation in an environment allowing operation in a Full Duplex Radio (FDR) scheme, the apparatus comprising:

a processor configured to determine whether to release an additionally allocated RS, or to additionally allocate an RS for channel estimation of a nonlinear component of a self-interference signal, according to a change in transmit power of the apparatus;

wherein the processor is further configured to determine to additionally allocate the RS for the channel estimation of the nonlinear component of the self-interference signal when the transmit power of the apparatus is increased; and

a transmitter configured to transmit information on a resource of the additionally allocated RS to be released or information on a resource of the RS to be additionally allocated according to the determination.

7. The apparatus of claim 6 , wherein the processor is further configured to determine to release the additionally allocated RS when the transmit power of the apparatus is decreased.

8. The apparatus of claim 6 , wherein the processor performs the determination only when the transmit power is greater than or equal to a predefined threshold.

9. The apparatus of claim 6 , wherein the information on the resources of the additionally allocated RS to be released comprises resource position information on the additionally allocated RS to be released.

10. The apparatus of claim 6 , wherein the information on the resources of the RS to be additionally allocated comprises resource position information on the RS to be additionally allocated.

11. A method for an apparatus operating in a Full Duplex Radio (FDR) scheme, the method comprising:

determining to release an additionally allocated reference signal (RS) based on a transmit power of the apparatus decreasing;

determining to additionally allocate an RS for channel estimation of a nonlinear component of a self-interference signal based on the transmit power of the apparatus increasing;

transmitting information on a resource of the additionally allocated RS to be released based on the determining to release the additionally allocated RS; and

transmitting information on a resource of the RS to be additionally allocated based on the determining to additionally allocate the RS.