Method and apparatus for transmitting and receiving data channel

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 2n 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.

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 2n 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.

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 2n 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.