Device and method for transmitting signal in wireless communication system

1 . A method performed by a base station in a wireless communication system, the method comprising:

receiving, from a user equipment (UE) configured with timing advance (TA) value, an uplink signal in an uplink period, according to a time division duplex (TDD) configuration;

transmitting, through a transmission path of the base station, an advance signal for a predetermined duration between an end point of receiving the uplink signal and a start point of a downlink period of the TDD configuration, the transmission path of the base station having a power amplifier as a transmission end; and

transmitting, to the UE, a downlink signal in the downlink period.

2 . The method of claim 1 , wherein the transmitting the advance signal comprises:

identifying the TA value configured to the UE;

identifying, based on the TA value, the predetermined duration for transmitting the advance signal; and

generating the advance signal.

3 . The method of claim 1 , wherein the predetermined duration of the advance signal is identified based on at least one of a first sub-carrier spacing (SCS) of the uplink signal or a second SCS of the downlink signal.

4 . The method of claim 1 ,

wherein the predetermined duration of the advance signal is identified based on at least one of an element state or thermal equilibrium state information of the power amplifier, and

wherein the element state of the power amplifier comprises at least one of a thermal expansion coefficient, an electrical conductivity, a specific resistance, or a specific heat of the power amplifier.

5 . The method of claim 1 ,

wherein an amplitude of the advance signal is identified based on at least one of a TA value or an element state of the power amplifier, and

wherein the element state of the power amplifier comprises at least one of a thermal expansion coefficient, an electrical conductivity, a specific resistance, or a specific heat of the power amplifier.

6 . The method of claim 1 , wherein the advance signal is modulated with at least one of a binary phase shift keying (BPSK) or quadrature phase shift keying (QPSK).

7 . The method of claim 1 , wherein the advance signal comprises a dummy signal for channel occupancy of a shared spectrum.

8 . The method of claim 1 , wherein the transmitting the advance signal comprises:

based on a temperature change rate of the power amplifier being smaller than a predefined threshold, stopping transmission of the advance signal.

9 . The method of claim 1 , further comprising:

identifying, after the receiving of the uplink signal, whether the power amplifier is in a thermal equilibrium state based on a temperature value of an element state of the power amplifier;

based on the power amplifier being in the thermal equilibrium state, preventing generating the advance signal; and

based on the power amplifier not being in the thermal equilibrium state, generating the advance signal.

10 . The method of claim 1 , further comprising:

identifying an amplitude of the advance signal, based on the TA value configured to the UE.

11 . A base station in a wireless communication system, the base station comprising:

at least one transceiver;

at least one memory storing instructions; and

at least one processor operatively connected to the at least one transceiver, and the at least one memory,

wherein the at least one processor is configured to execute the instructions to:

receive, from a user equipment (UE) configured with timing advance (TA) value, an uplink signal in an uplink period, according to a time division duplex (TDD) configuration;

transmit, through a transmission path of the base station, an advance signal for a predetermined duration between an end point of receiving the uplink signal and a start point of a downlink period of the TDD configuration, the transmission path of the base station having a power amplifier as a transmission end; and

transmit, to the UE, a downlink signal in the downlink period.

12 . The base station of claim 11 , wherein the at least one processor is further configured to execute the instructions to:

identify the TA value configured to the UE;

identify, based on the TA value, the predetermined duration for transmitting the advance signal; and

generate the advance signal.

13 . The base station of claim 11 , wherein the predetermined duration of the advance signal is identified based on at least one of a first sub-carrier spacing (SCS) of the uplink signal or a second SCS of the downlink signal.

14 . The base station of claim 11 ,

wherein the predetermined duration of the advance signal is identified based on at least one of an element state or thermal equilibrium state information of the power amplifier, and

wherein the element state of the power amplifier comprises at least one of a thermal expansion coefficient, an electrical conductivity, a specific resistance, or a specific heat of the power amplifier.

15 . The base station of claim 11 ,

wherein an amplitude of the advance signal is identified based on at least one of a TA value or an element state of the power amplifier, and

wherein the element state of the power amplifier comprises at least one of a thermal expansion coefficient, an electrical conductivity, a specific resistance, or a specific heat of the power amplifier.

16 . The base station of claim 11 , wherein the advance signal is modulated with at least one of a binary phase shift keying (BPSK) or quadrature phase shift keying (QPSK).

17 . The base station of claim 11 , wherein the advance signal comprises a dummy signal for channel occupancy of a shared spectrum.

18 . The base station of claim 11 , wherein the at least one processor is further configured to execute the instructions to:

based on a temperature change rate of the power amplifier being smaller than a predefined threshold, stop transmission of the advance signal.

19 . The base station of claim 11 , wherein the at least one processor is further configured to execute the instructions to:

identify, after receipt of the uplink signal, whether the power amplifier is in a thermal equilibrium state based on a temperature value of an element state of the power amplifier;

based on the power amplifier being in the thermal equilibrium state, prevent generation of the advance signal; and

based on the power amplifier not being in the thermal equilibrium state, generate the advance signal.

20 . The base station of claim 11 , wherein the at least one processor is further configured to execute the instructions to:

identify an amplitude of the advance signal, based on the TA value configured to the UE.