Reporting uplink control information in a random access procedure

A method of wireless communication performed by a network entity, comprising:

• receiving, in a random access occasion and using a first set of resources, a first random access message, that is a first step of a two-step random access channel (RACH) procedure, comprising:
• a first random access preamble identifier corresponding to a preamble of the first random access message, and
• first uplink control information (UCI) comprising an indication of a downlink beam,
• wherein the downlink beam is different from a default beam corresponding to the preamble of the first random access message and further to the random access occasion, or
• wherein the downlink beam is selected from a set of multiple downlink beams corresponding to the random access occasion;
• transmitting, based at least in part on receiving the first random access message, a first random access response comprising:
• a second random access preamble identifier,
• at least one of:
• at least a portion of a second UCI, or
• information identifying a second set of resources, and
• an indication to fall back to a four-step RACH procedure;
• receiving a second random access message, of the four-step RACH procedure, based at least in part on:
• the first random access preamble identifier matching the second random access preamble identifier, and
• at least one of:
• at least a portion of the first UCI matching the at least the portion of the second UCI, or
• the first set of resources matching the second set of resources;
• and
• transmitting, using the downlink beam and based at least in part on receiving the second random access message, a second random access response of the four-step RACH procedure.

A user equipment (UE), comprising:

• one or more memories;
• and
• one or more processors, coupled to the one or more memories, configured to:
• transmit, in a random access occasion and using a first set of resources, a first random access message, that is a first step of a two-step random access channel (RACH) procedure, comprising:
• a first random access preamble identifier corresponding to a preamble of the first random access message, and
• first uplink control information (UCI) comprising an indication of a downlink beam,
• wherein the downlink beam is different from a default beam corresponding to the preamble of the first random access message and further to the random access occasion, or
• wherein the downlink beam is selected from a set of multiple downlink beams corresponding to the random access occasion;
• receive, based at least in part on transmitting the first random access message, a first random access response comprising:
• a second random access preamble identifier,
• at least one of:
• at least a portion of a second UCI, or
• information identifying a second set of resources, and
• an indication to fall back to a four-step RACH procedure;
• transmit a second random access message, of the four-step RACH procedure, based at least in part on:
• the first random access preamble identifier matching the second random access preamble identifier, and
• at least one of:
• at least a portion of the first UCI matching the at least the portion of the second UCI, or
• the first set of resources matching the second set of resources;
• and
• receive, using the downlink beam and based at least in part on transmitting the second random access message, a second random access response of the four-step RACH procedure.

A network entity, comprising:

• one or more memories;
• and
• one or more processors, coupled to the one or more memories, configured to:
• receive, in a random access occasion and using a first set of resources, a first random access message, that is a first step of a two-step random access channel (RACH) procedure, comprising:
• a first random access preamble identifier corresponding to a preamble of the first random access message, and
• first uplink control information (UCI) comprising an indication of a downlink beam,
• wherein the downlink beam is different from a default beam corresponding to the preamble of the first random access message and further to the random access occasion, or
• wherein the downlink beam is selected from a set of multiple downlink beams corresponding to the random access occasion;
• transmit, based at least in part on transmitting the first random access message, a first random access response comprising:
• a second random access preamble identifier,
• at least one of:
• at least a portion of a second UCI, or
• information identifying a second set of resources, and
• an indication to fall back to a four-step RACH procedure;
• receive a second random access message, of the four-step RACH procedure, based at least in part on:
• the first random access preamble identifier matching the second random access preamble identifier, and
• at least one of:
• at least a portion of the first UCI matching the at least the portion of the second UCI, or
• the first set of resources matching the second set of resources;
• and
• transmit, using the downlink beam and based at least in part on transmitting the second random access message, a second random access response of the four-step RACH procedure.