Signaling support and resource mapping for 2-step RACH

A method comprising for wireless communication at a base station, comprising:

• transmitting, to a user equipment (UE), an indication of a resource configuration for a random access procedure, the resource configuration identifying a plurality of sets of transmission resources corresponding to a plurality of radio resource control states;
• receiving, from the UE, a first message of the random access procedure;
• identifying a radio resource control state of the UE based at least in part on the received first message of the random access procedure and the transmitted indication of the resource configuration;
• and
• transmitting, to the UE based at least in part on the identified radio resource control state of the UE, a second message of the random access procedure in response to the received first message.

An apparatus for wireless communication at a user equipment (UE), comprising:

• a processor,
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive, from a base station, an indication of a resource configuration for a random access procedure, the resource configuration identifying a plurality of sets of transmission resources corresponding to a plurality of radio resource control states;
• identify a radio resource control state of the UE;
• determine a set of transmission resources based at least in part on the indication of the resource configuration, a transport format, and the identified radio resource control state;
• and
• transmit a first message of the random access procedure to the base station using the determined transmission resources and the transport format.

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

• a processor,
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit, to a user equipment (UE), an indication of a resource configuration for a random access procedure, the resource configuration identifying a plurality of sets of transmission resources corresponding to a plurality of radio resource control states;
• receive, from the UE, a first message of the random access procedure;
• identify a radio resource control state of the UE based at least in part on the received first message of the random access procedure and the transmitted indication of the resource configuration;
• and
• transmit, to the UE based at least in part on the identified radio resource control state of the UE, a second message of the random access procedure in response to the received first message.