Frequency domain allocation for a random access message for sub-band full duplex communication

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

• receiving information indicative of an initial uplink bandwidth part, an active uplink bandwidth part, or both;
• transmitting, as part of an access procedure, a random access preamble message;
• receiving, in response to transmission of the random access preamble message, a random access response message comprising an uplink grant;
• and
• transmitting, responsive to the uplink grant and based at least in part on a first physical resource block (PRB), an uplink scheduled random access message, wherein:
• transmission of the uplink scheduled random access message is within a set of usable uplink PRBs, the set of usable uplink PRBs based at least in part on the active uplink bandwidth part and an uplink sub-band associated with a sub-band full duplex configuration at the UE, and
• transmission of the uplink scheduled random access message within the set of usable uplink PRBs is based at least in part on the first PRB being within the set of usable uplink PRBs or being offset from a reference PRB, wherein the reference PRB is associated with the initial uplink bandwidth part or with the active uplink bandwidth part.

A non-transitory computer-readable medium storing code, the code comprising instructions executable by one or more processors to:

• receive information indicative of an initial uplink bandwidth part, an active uplink bandwidth part, or both;
• transmit, as part of an access procedure, a random access preamble message;
• receive, in response to transmission of the random access preamble message, a random access response message comprising an uplink grant;
• and
• transmit, responsive to the uplink grant and based at least in part on a first physical resource block (PRB), an uplink scheduled random access message, wherein:
• transmission of the uplink scheduled random access message is within a set of usable uplink PRBs, the set of usable uplink PRBs based at least in part on the active uplink bandwidth part and an uplink sub-band associated with a sub-band full duplex configuration at a user equipment (UE), and
• transmission of the uplink scheduled random access message within the set of usable uplink PRBs is based at least in part on the first PRB being within the set of usable uplink PRBs or being offset from a reference PRB, wherein the reference PRB is associated with the initial uplink bandwidth part or with the active uplink bandwidth part.