Method and device for transmitting pusch by changing the number of bits of dci field in wireless communication system

A user equipment (UE) configured to operate in a wireless communication system, the UE comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver,
• wherein the at least one processor is configured to:
• monitor a physical downlink control channel (PDCCH) comprising downlink control information (DCI);
• and
• transmit a physical uplink shared channel (PUSCH) based on the DCI,
• wherein a bandwidth part (BWP) indicator field is configured in the DCI,
• wherein based on the BWP indicator field indicating an active uplink (UL) BWP with different number of resource block (RB) sets than a current active UL BWP, the UE determines an UL frequency domain resource allocation for the PUSCH based on L bits,
• wherein the L bits are generated based on K least significant bits (LSBs) of a frequency domain resource assignment field of the DCI, and
• wherein the K LSBs provide RB set allocation information.

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

• transmitting a physical downlink control channel (PDCCH) comprising downlink control information (DCI);
• and
• receiving a physical uplink shared channel (PUSCH) related to the DCI,
• wherein a bandwidth part (BWP) indicator field is configured in the DCI,
• wherein based on the BWP indicator field indicating an active uplink (UL) BWP with different number of resource block (RB) sets than a current active UL BWP, an UL frequency domain resource allocation for the PUSCH is determined based on L bits,
• wherein the L bits are generated based on K least significant bits (LSBs) of a frequency domain resource assignment field of the DCI, and
• wherein the K LSBs provide RB set allocation information.

A base station configured to operate in a wireless communication system, the base station comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver,
• wherein the at least one processor is configured to:
• transmit a physical downlink control channel (PDCCH) comprising downlink control information (DCI);
• and
• receive a physical uplink shared channel (PUSCH) related to the DCI,
• wherein a bandwidth part (BWP) indicator field is configured in the DCI,
• wherein based on the BWP indicator field indicating an active uplink (UL) BWP with different number of resource block (RB) sets than a current active UL BWP, an UL frequency domain resource allocation for the PUSCH is determined based on L bits,
• wherein the L bits are generated based on K least significant bits (LSBs) of a frequency domain resource assignment field of the DCI, and
• wherein the K LSBs provide RB set allocation information.