Method and apparatus for transmitting/receiving wireless signal in wireless communication system

1. A method of receiving a signal by a user equipment (UE) in a wireless communication system, the method comprising:

receiving, in a first common frequency resource (CFR) associated with a first bandwidth part (BWP) of the UE, first multicast/broadcast service (MBS) data;

receiving, in the first BWP, a physical downlink control channel (PDCCH) carrying downlink control information (DCI) including information regarding BWP switching;

activating a second BWP based on the DCI; and

receiving second MBS data,

wherein, based on i) the second BWP being activated as an active BWP of the UE and ii) a second CFR different from the first CFR being associated with the second BWP, the UE activates the second CFR and receives the second MBS data in the second CFR.

2. The method of claim 1 , further comprising:

transmitting a negative acknowledgement (NACK) for the first MBS data,

wherein the UE receives, in response to the NACK transmission, the second MBS data as a retransmission of the first MBS data.

3. The method of claim 2 , wherein the NACK transmission is performed based on the first BWP, before the activation of the second BWP.

4. The method of claim 2 , wherein the NACK transmission is performed based on the second BWP, after the activation of the second BWP.

5. The method of claim 1 , further comprising:

transmitting an acknowledgement (ACK) for the first MBS data,

wherein the UE receives, in response to the ACK transmission, the second MBS data as a new MBS data transmission.

6. The method of claim 1 , wherein the UE receives the second MBS data as a new MBS data transmission, without transmitting an acknowledgement (ACK) for the first MBS data.

7. The method of claim 1 , wherein the DCI is configured to schedule the second MBS data in the second CFR.

8. The method of claim 1 , wherein the first CFR and the first BWP are deactivated upon the activation of the second BWP.

9. The method of claim 1 , wherein the first CFR is included in the first BWP and the second CFR is included in the second BWP.

10. A non-transitory computer-readable medium storing program codes for performing the method of claim 1 .

11. A device for wireless communication, the device comprising:

a memory configured to store instructions; and

a processor configured to perform operations by executing the instructions, the operations comprising:

receiving, in a first common frequency resource (CFR) associated with a first bandwidth part (BWP) of the device, first multicast/broadcast service (MBS) data;

receiving, in the first BWP, a physical downlink control channel (PDCCH) carrying downlink control information (DCI) including information regarding BWP switching;

activating a second BWP based on the DCI; and

receiving second MBS data,

wherein, based on i) the second BWP being activated as an active BWP of the device and ii) a second CFR different from the first CFR is associated with the second BWP, the processor activates the second CFR and receives the second MBS data in the second CFR.

12. The device according to claim 11 , further comprising;

a transceiver configured to transmit or receive a signal under control of the processor.

13. The device according to claim 12 , wherein the device is a user equipment (UE) configured to perform 3rd generation partnership project (3GPP)-based wireless communication.

14. The device according to claim 11 , wherein the device is an application specific integrated circuit (ASIC) or a digital signal processing device configured to control a user equipment (UE) for 3rd generation partnership project (3GPP)-based wireless communication.