Mapping one preamble to multiple physical uplink shared channel resource units for two-step random access procedure

An apparatus for wireless communication, comprising:

• means for receiving, from a base station, random access configuration information;
• means for determining a preamble for a random access message from a preamble group for a random access occasion (RO), wherein the random access message comprises a MsgA of a 2-step random access procedure;
• wherein the means for determining is further configured to determine one or more physical uplink shared channel resource unit (PRU) resource sets for the random access message based on the preamble and a mapping based on the random access configuration information, wherein the random access configuration information maps the preamble in the preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA;
• and
• means for transmitting, to the base station, the random access message including the preamble and a payload, wherein the means for transmitting is configured to transmit the payload using one or more PRU groups of the one or more PRU resource sets based on the mapping.

An apparatus for wireless communication, comprising:

• memory;
• and
• at least one processor coupled to the memory and configured to:
• receive, from a base station, random access configuration information;
• determine a preamble for a random access message from a preamble group for a random access occasion (RO), wherein the random access message comprises a MsgA of a 2-step random access procedure;
• determine one or more physical uplink shared channel resource unit (PRU) resource sets for the random access message based on the preamble and a mapping based on the random access configuration information, wherein the random access configuration information maps the preamble in the preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA;
• and
• transmit, to the base station, the random access message including the preamble and a payload, wherein the at least one processor is configured to transmit the payload using one or more PRU groups of the one or more PRU resource sets based on the mapping.

A non-transitory computer-readable medium storing computer executable code, the code when executed by at least one processor cause the at least one processor to:

• receive, from a base station, random access configuration information;
• determine a preamble for a random access message from a preamble group for a random access occasion (RO), wherein the random access message comprises a MsgA of a 2-step random access procedure;
• determine one or more physical uplink shared channel resource unit (PRU) resource sets for the random access message based on the preamble and a mapping based on the random access configuration information, wherein the random access configuration information maps the preamble in the preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA;
• and
• transmit, to the base station, the random access message including the preamble and a payload, wherein the processor transmits the payload using one or more PRU groups of the one or more PRU resource sets based on the mapping.

A method of wireless communication at a base station, comprising:

• transmitting, to a user equipment (UE), random access configuration information, wherein the random access configuration information is transmitted using at least one of system information or radio resource control (RRC) signaling, and wherein the random access configuration information includes a mapping of a preamble for a MsgA of a 2-step random access procedure to one or more physical uplink shared channel resource unit (PRU) resource sets, wherein the random access configuration information maps the preamble in a preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA;
• and
• receiving a random access message from the UE including the preamble on a random access occasion (RO), wherein the preamble is from the preamble group,
• wherein the random access message includes a payload received in one or more PRU groups of the one or more PRU resource sets based on the mapping.

An apparatus for wireless communication, comprising:

• means for transmitting, to a user equipment (UE), random access configuration information, wherein the random access configuration information is transmitted using at least one of system information or radio resource control (RRC) signaling, and wherein the random access configuration information includes a mapping of a preamble for a MsgA of a 2-step random access procedure to one or more physical uplink shared channel resource unit (PRU) resource sets, wherein the random access configuration information maps the preamble in a preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA;
• and
• means for receiving a random access message from the UE including the preamble on a random access occasion (RO), wherein the preamble is from the preamble group,
• wherein the random access message includes a payload received in one or more PRU groups of the one or more PRU resource sets based on the mapping.

An apparatus for wireless communication, comprising:

• memory;
• and
• at least one processor coupled to the memory and configured to:
• transmit, to a user equipment (UE), random access configuration information, wherein the random access configuration information is transmitted using at least one of system information or radio resource control (RRC) signaling, and wherein the random access configuration information includes a mapping of a preamble for a MsgA of a 2-step random access procedure to one or more physical uplink shared channel resource unit (PRU) resource sets, wherein the random access configuration information maps the preamble in a preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA;
• and
• receive a random access message from the UE including the preamble on a random access occasion (RO), wherein the preamble is from the preamble group,
• wherein the random access message includes a payload received in one or more PRU groups of the one or more PRU resource sets based on the mapping.

A non-transitory computer-readable medium storing computer executable code, the code when executed by a processor cause the processor to:

• transmit, to a user equipment (UE), random access configuration information, wherein the random access configuration information is transmitted using at least one of system information or radio resource control (RRC) signaling, and wherein the random access configuration information includes a mapping of a preamble for a MsgA of a 2-step random access procedure to one or more physical uplink shared channel resource unit (PRU) resource sets, wherein the random access configuration information maps the preamble in a preamble group to a first PRU at a first frequency and a second PRU at a second frequency based on a frequency hop for the MsgA;
• and
• receive a random access message from the UE including the preamble on a random access occasion (RO), wherein the preamble is from the preamble group,
• wherein the random access message includes a payload received in one or more PRU groups of the one or more PRU resource sets based on the mapping.