Method and apparatus for transmitting and receiving signal in a communication system

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

• transmitting, to a terminal, information associated with a physical random access channel (PRACH) and a physical uplink shared channel (PUSCH) resource for a 2-step random access type procedure;
• and
• receiving, from the terminal, a PUSCH on a valid PUSCH occasion,
• wherein a number of N preamble indexes of valid PRACH occasions are mapped to the valid PUSCH occasion and an associated demodulation reference signal DMRS resource, and
• wherein N is the number of preamble indexes mapped to the valid PUSCH occasion and associated DMRS resource and determined based on:
• a total number of valid PRACH occasions per association pattern period multiplied by a number of preambles per valid PRACH occasion, and
• a total number of valid PUSCH occasions per PUSCH configuration per association pattern period multiplied by a number of DMRS resource indexes per valid PUSCH occasion.

A terminal in a communication system, the terminal comprising:

• a transceiver;
• and
• a controller configured to:
• receive, from a base station, information associated with a physical random access channel (PRACH) and a physical uplink shared channel (PUSCH) resource for a 2-step random access type procedure;
• map a number of N preamble indexes of valid PRACH occasions to a valid PUSCH occasion and an associated demodulation reference signal (DMRS) resource;
• and
• transmit, to the base station, a PUSCH on the PUSCH occasion,
• wherein N is the number of preamble indexes mapped to the valid PUSCH occasion and associated DMRS resource and determined based on:
• a total number of valid PRACH occasions per association pattern period multiplied by a number of preambles per valid PRACH occasion, and
• a total number of valid PUSCH occasions per PUSCH configuration per association pattern period multiplied by a number of DMRS resource indexes per valid PUSCH occasion.

A base station in a communication system, the base station comprising:

• a transceiver;
• and
• a controller configured to:
• transmit, to a terminal, information associated with a physical random access channel (PRACH) and a physical uplink shared channel (PUSCH) resource for a 2-step random access type procedure, and
• receive, from the terminal, a PUSCH on a valid PUSCH occasion,
• wherein a number of N preamble indexes of valid PRACH occasions are mapped to the valid PUSCH occasion and an associated demodulation reference signal (DMRS) resource, and
• wherein N is the number of preamble indexes mapped to the valid PUSCH occasion and associated DMRS resource and determined based on:
• a total number of valid PRACH occasions per association pattern period multiplied by a number of preambles per valid PRACH occasion, and
• a total number of valid PUSCH occasions per PUSCH configuration per association pattern period multiplied by a number of DMRS resource indexes per valid PUSCH occasion.