Methods and devices for subband full duplex random access

A method for wireless communication, comprising:

• receiving, by a base station, a physical random access channel (PRACH) transmission from a user equipment (UE) by:
• configuring, by the base station, a random access channel occasion (RO) configuration for the UE;
• determining, by the base station, whether the RO is valid for a UL subband based on a set of pre-defined rules, wherein the UL subband is configured in at least one downlink (DL) symbol or at least one flexible symbol and is configured within a part of frequency domain resources of the at least one DL symbol or at least one flexible symbol;
• and
• in response to the determining that the RO is valid, receiving, by the base station, the PRACH transmission in the RO from the UE.

An apparatus comprising:

• a memory storing instructions;
• and
• at least one processor in communication with the memory, wherein, when the at least one processor executes the instructions, the at least one processor is configured to cause the apparatus to perform a physical random access channel (PRACH) transmission to a base station by:
• obtaining a random access channel occasion (RO) configuration for a RO;
• determining whether the RO is valid for a uplink (UL) subband based on a set of pre-defined rules, wherein the UL subband is configured in at least one downlink (DL) symbol or at least one flexible symbol and is configured within a part of frequency domain resources of the at least one DL symbol or at least one flexible symbol;
• and
• in response to the determining that the RO is valid, transmitting the PRACH transmission in the RO to the base station.

An apparatus comprising:

• a memory storing instructions;
• and
• at least one processor in communication with the memory, wherein, when the at least one processor executes the instructions, the at least one processor is configured to cause the apparatus to perform:
• receiving a physical random access channel (PRACH) transmission from a user equipment (UE) by:
• configuring a random access channel occasion (RO) configuration for the UE;
• determining whether the RO is valid for a UL subband based on a set of pre-defined rules, wherein the UL subband is configured in at least one downlink (DL) symbol or at least one flexible symbol and is configured within a part of frequency domain resources of the at least one DL symbol or at least one flexible symbol;
• and
• in response to the determining that the RO is valid, receiving the PRACH transmission in the RO from the UE.