Wireless communication including random access

An apparatus for wireless communication at a User Equipment (UE), comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive at least one of a Synchronization Signal Block (SSB) or a Channel State Information Reference Signal (CSI-RS) from a base station through a first cell with an uplink transmission limitation that restricts transmit power in uplink signaling between the UE and the base station;
• and
• transmit, to the base station through a second cell, a random access message corresponding to one of the at least one of the SSB or the CSI-RS, using one or more Random Access Channel (RACH) parameters corresponding to the first cell that enables the base station to transmit downlink signaling to the UE via the first cell having the uplink transmission limitation.

An apparatus for wireless communication at a User Equipment (UE), comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive at least one of a Synchronization Signal Block (SSB) or a Channel State Information Reference Signal (CSI-RS) from a base station on a first frequency band having an uplink transmission limitation that restricts transmit power in uplink signaling between the UE and the base station;
• and
• transmit, to the base station on a second frequency band, a random access message corresponding to one of the at least one of the SSB or the CSI-RS, using one or more Random Access (RACH) parameters corresponding the first frequency band that enables the base station to transmit downlink signaling to the UE via the first frequency band having the uplink transmission limitation.

An apparatus for wireless communication at a base station, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• transmit at least one of a Synchronization Signal Block (SSB) or a Channel State Information Reference Signal (CSI-RS) through a first cell with an uplink transmission limitation that restricts transmit power in uplink signaling between a User Equipment (UE) and the base station;
• and
• receive, from the UE through a second cell, a random access message corresponding to one of the at least one of the SSB or the CSI-RS, wherein the random access message indicates an index corresponding to the first cell that enables the base station to transmit downlink signaling to the UE via the first cell with the uplink transmission limitation.

An apparatus for wireless communication at a base station, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• transmit at least one of a Synchronization Signal Block (SSB) or a Channel State Information Reference Signal (CSI-RS) on a first frequency band with an uplink transmission limitation that restricts transmit power in uplink signaling between a User Equipment (UE) and the base station;
• and
• receive, from the UE on a second frequency band, a random access message corresponding to one of the at least one of the SSB or the CSI-RS, wherein the random access message indicates an index corresponding to the first frequency band that enables the base station to transmit downlink signaling to the UE via the first frequency band with the uplink transmission limitation.