Techniques for performing random access using multiple beams in wireless communications

An apparatus for wireless communication, comprising:

• a transceiver;
• a memory configured to store instructions;
• and
• one or more processors coupled with the memory and the transceiver, wherein the one or more processors are configured to:
• receive with one or multiple transmission/reception points (TRPs), from a user equipment (UE) as part of a random access procedure, multiple instances of a first random access message, the first random access message including a preamble portion and a payload portion, wherein receiving each of the multiple instances of the first random access message includes:
• receiving, based on one of multiple receive beams, a preamble portion of the respective instance of the first random access message;
• and
• receiving, based on the one of the multiple receive beams and after a transmission gap in time from the preamble portion, a payload portion of the respective instance of the first random access message;
• determine multiple beams to use in transmitting messages in the random access procedure;
• and
• transmit with one or multiple TRPs, to the UE and in response to the first random access message, multiple instances of a second random access message based on the multiple beams.

A method for wireless communication at a user equipment (UE), comprising:

• selecting multiple beams to use in transmitting messages in a random access procedure with one or more transmission/reception points (TRPs) of a cell;
• and
• transmitting, to the one or more TRPs of the cell, multiple instances of a first random access message based on the multiple beams, the first random access message including a preamble portion and a payload portion, wherein transmitting each of the multiple instances of the first random access message includes:
• transmitting, based on one of the multiple beams, a preamble portion of the respective instance of the first random access message;
• and
• transmitting, based on the one of the multiple beams and after a transmission gap in time from the preamble portion, a payload portion of the respective instance of the first random access message.

A method for wireless communication, comprising:

• receiving with one or multiple transmission/reception points (TRPs), from a user equipment (UE) as part of a random access procedure, multiple instances of a first random access message, the first random access message including a preamble portion and a payload portion, wherein receiving each of the multiple instances of the first random access message includes:
• receiving, based on one of multiple receive beams, a preamble portion of the respective instance of the first random access message;
• and
• receiving, based on the one of the multiple receive beams and after a transmission gap in time from the preamble portion, a payload portion of the respective instance of the first random access message;
• determining multiple beams to use in transmitting messages in the random access procedure;
• and
• transmitting with one or multiple TRPs, to the UE and in response to the first random access message, multiple instances of a second random access message based on the multiple beams.