Method for transmitting and receiving signal in wireless communication system, and device supporting same

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

• a memory storing instructions;
• and
• at least one processor coupled with the memory and configured to execute the instructions to perform operations comprising:
• transmitting a message A related to a random access procedure, where the message A comprises a physical random access channel (PRACH) preamble among a plurality of PRACH preambles and a physical uplink shared channel (PUSCH);
• and
• in response to the message A, receiving a message B related to the random access procedure,
• wherein each of the plurality of PRACH preambles is mapped to a demodulation reference signal (DM-RS) resource among a plurality of DM-RS resources related to the PUSCH in increasing order of DM-RS resource indexes, and
• wherein the DM-RS resource indexes are determined first in an ascending order of a DM-RS port index and second in an ascending order of a DM-RS sequence index.

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

• receiving a message A related to a random access procedure, where the message A comprises a physical random access channel (PRACH) preamble among a plurality of PRACH preambles and a physical uplink shared channel (PUSCH);
• and
• in response to the message A, transmitting a message B related to the random access procedure,
• wherein each of the plurality of PRACH preambles is mapped to a demodulation reference signal (DM-RS) resource among a plurality of DM-RS resources related to the PUSCH in increasing order of DM-RS resource indexes, and
• wherein the DM-RS resource indexes are determined first in an ascending order of a DM-RS port index and second in an ascending order of a DM-RS sequence index.

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

• a memory storing instructions;
• and
• at least one processor coupled with the memory and configured to execute the instructions to perform operations comprising:
• receiving a message A related to a random access procedure, where the message A comprises a physical random access channel (PRACH) preamble among a plurality of PRACH preambles and a physical uplink shared channel (PUSCH);
• and
• in response to the message A, transmitting a message B related to the random access procedure,
• wherein each of the plurality of PRACH preambles is mapped to a demodulation reference signal (DM-RS) resource among a plurality of DM-RS resources related to the PUSCH in increasing order of DM-RS resource indexes, and
• wherein the DM-RS resource indexes are determined first in an ascending order of a DM-RS port index and second in an ascending order of a DM-RS sequence index.