Method and apparatus for transmitting and receiving data channel

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

receiving downlink control information (DCI) including information related to a resource region for a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH);

acquiring a resource indication value (RIV) from the DCI;

acquiring a first length of allocated resource blocks based on the RIV;

scaling the first length of allocated resource blocks to a second length of allocated resource blocks, based on a scaling factor; and

receiving the PDSCH or transmitting the PUSCH based on the second length of allocated resource blocks,

wherein a size of the DCI is determined based on an initial bandwidth part (BWP) and the PDSCH is received or the PUSCH is transmitted in an active BWP,

wherein the scaling factor is a largest integer of 2 n which is equal to or less than a first value

wherein the first value is obtained by applying a floor function to a second value calculated by dividing a size of the active BWP by a size of the initial BWP, and

wherein n is a non-negative integer.

2. The method according to claim 1 , wherein a first starting resource block is acquired based on the RIV, and

wherein the first starting resource block is scaled to a second starting resource block based on the scaling factor.

3. The method according to claim 1 , wherein the UE is communicable with at least one of another UE, a network, a base station, or an autonomous vehicle.

4. An apparatus for transmitting and receiving a data channel in a wireless communication system, the apparatus comprising:

at least one processor; and

at least one memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:

receiving downlink control information (DCI) including information related to a resource region for a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH);

acquiring a resource indication value (RIV) from the DCI;

acquiring a first length of allocated resource blocks based on the RIV;

scaling the first length of allocated resource blocks to a second length of allocated resource blocks, based on a scaling factor; and

receiving the PDSCH or transmitting the PUSCH based on the second length of allocated resource blocks,

wherein a size of the DCI is determined based on an initial bandwidth part (BWP) and the PDSCH is received or the PUSCH is transmitted in an active BWP,

wherein the scaling factor is a largest integer of 2 n which is equal to or less than a first value,

wherein the first value is obtained by applying a floor function to a second value calculated by dividing a size of the active BWP by a size of the initial BWP, and

wherein n is a non-negative integer.

5. The apparatus according to claim 4 , wherein a first starting resource block is acquired based on the RIV, and

wherein the first starting resource block is scaled to a second starting resource block based on the scaling factor.

6. The apparatus according to claim 4 , wherein the apparatus is communicable with at least one of another UE, a network, a base station, or an autonomous vehicle.

7. A user equipment (UE) for transmitting and receiving a data channel in a wireless communication system, the UE comprising:

at least one transceiver;

at least one processor; and

at least one memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:

receiving, via the at least one transceiver, downlink control information (DCI) including information related to a resource region for a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH);

acquiring a resource indication value (RIV) from the DCI;

acquiring a first length of allocated resource blocks based on the RIV;

scaling the first length of allocated resource blocks to a second length of allocated resource blocks, based on a scaling factor; and

receiving, via the at least one transceiver, the PDSCH or transmitting the PUSCH based on the second length of allocated resource blocks,

wherein a size of the DCI is determined based on an initial bandwidth part (BWP) and the PDSCH is received or the PUSCH is transmitted in an active BWP,

wherein the scaling factor is a largest integer of 2 n which is equal to or less than a first value,

wherein the first value is obtained by applying a floor function to a second value calculated by dividing a size of the active BWP by a size of the initial BWP, and

wherein n is a non-negative integer.

8. A method of transmitting and receiving a data channel by a base station (BS) in a wireless communication system, the method comprising:

transmitting downlink control information (DCI) including resource region information related to a resource indication value (RIV); and

transmitting a physical downlink shared channel (PDSCH) or receiving a physical uplink shared channel (PUSCH), based on a length of first allocated resource blocks based on the RIV,

wherein the length of first allocated resource blocks are acquired by scaling a length of second allocated resource blocks acquired from the RIV, based on a scaling factor,

wherein a size of the DCI is determined an initial bandwidth part (BWP) and the PDSCH is received or the PUSCH is transmitted in an active BWP,

wherein the scaling factor is a largest integer of 2 n which is equal to or less than a first value

wherein the first value is obtained by applying a floor function to a second value calculated by dividing a size of the active BWP by a size of the initial BWP, and

wherein n is a non-negative integer.