Method of transmitting and receiving physical random access channel and device therefor

A device for wireless communication, the device comprising:

• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• receiving information regarding a Physical Random Access Channel (PRACH) resource configuration;
• transmitting, to a base station (BS), a random access preamble (RAP) based on at least one valid PRACH occasion among a plurality of PRACH occasions in a PRACH slot,
• wherein the PRACH slot and the plurality of PRACH occasions are configured based on the PRACH resource configuration,
• wherein at least one Synchronization Signal Block (SSB) can be mapped to the at least one valid PRACH occasion, among the plurality of PRACH occasions, and
• wherein a PRACH occasion that is located after symbols for a last SSB is determined to be valid from among the plurality of PRACH occasions in the PRACH slot,
• receiving, from the BS, a random access response (RAR) in response to the RAP.

A method of performing a random access procedure by a base station (BS), the method comprising:

• transmitting information regarding a Physical Random Access Channel (PRACH) resource configuration;
• receiving, from a user equipment (UE), a random access preamble (RAP) based on at least one valid PRACH occasion among a plurality of PRACH occasions in a PRACH slot;
• and
• transmitting, to the UE, a random access response (RAR) in response to the RAP,
• wherein the PRACH slot and the plurality of PRACH occasions are configured based on the PRACH resource configuration,
• wherein at least one Synchronization Signal Block (SSB) can be mapped to the at least one valid PRACH occasion, among the plurality of PRACH occasions, and
• wherein a PRACH occasion that is located after symbols for a last SSB is determined to be valid from among the plurality of PRACH occasions in the PRACH slot.

A device for wireless communication, the device comprising:

• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
• transmitting information regarding a Physical Random Access Channel (PRACH) resource configuration;
• receiving, from a user equipment (UE), a random access preamble (RAP) based on at least one valid PRACH occasion among a plurality of PRACH occasions in a PRACH slot;
• and
• transmitting, to the UE, a random access response (RAR) in response to the RAP,
• wherein the PRACH slot and the plurality of PRACH occasions are configured based on the PRACH resource configuration,
• wherein at least one Synchronization Signal Block (SSB) can be mapped to the at least one valid PRACH occasion, among the plurality of PRACH occasions, and
• wherein a PRACH occasion that is located after symbols for a last SSB is determined to be valid from among the plurality of PRACH occasions in the PRACH slot.