Reference coordinates for two-step RACH resource configuration

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

• means for receiving, from a base station, random access configuration information for the base station;
• means for determining a first time duration for a preamble of a first random access message based on the random access configuration information received from the base station and a reference subcarrier spacing (SCS) associated with an uplink bandwidth part (BWP) configured for the first random access message;
• means for determining a second time duration for a payload of the first random access message based on the random access configuration information received from the base station and the reference SCS;
• means for determining a gap time duration for a transmission gap between the preamble and the payload based on the random access configuration information received from the base station and the reference SCS;
• and
• means for transmitting the first random access message to the base station to initiate a random access procedure.

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, from a base station, random access configuration information for the base station;
• determine a first time duration for a preamble of a first random access message based on the random access configuration information received from the base station and a reference subcarrier spacing (SCS) associated with an uplink bandwidth part (BWP) configured for the first random access message;
• determine a second time duration for a payload of the first random access message based on the random access configuration information received from the base station and the reference SCS;
• determine a gap time duration for a transmission gap between the preamble and the payload based on the random access configuration information received from the base station and the reference SCS;
• and
• transmit the first random access message to the base station to initiate a random access procedure.

A non-transitory computer-readable medium storing computer executable code for wireless communication at a user equipment (UE), the code when executed by a processor cause the processor to:

• receive, from a base station, random access configuration information for the base station;
• determine a first time duration for a preamble of a first random access message based on the random access configuration information received from the base station and a reference subcarrier spacing (SCS) associated with an uplink bandwidth part (BWP) configured for the first random access message;
• determine a second time duration for a payload of the first random access message based on the random access configuration information received from the base station and the reference SCS;
• determine a gap time duration for a transmission gap between the preamble and the payload based on the random access configuration information received from the base station and the reference SCS;
• and
• transmit the first random access message to the base station to initiate a random access procedure.

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

• transmitting random access configuration information for a random access procedure to a user equipment (UE) based on a reference subcarrier spacing (SCS) associated with an uplink bandwidth part (BWP) configured for a first random access message;
• receiving the first random access message from the UE to initiate a random access channel (RACH) procedure, the first random access message comprising a preamble and a payload, wherein a first time duration of the preamble and a second time duration of the payload are based on the reference SCS, wherein a gap time duration for a transmission gap between the preamble and the payload is based on the random access configuration information and the reference SCS;
• processing the first random access message;
• generating a second random access response message in response to the first random access message;
• and
• transmitting the second random access response message to the UE.

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

• means for transmitting random access configuration information for a random access procedure of a user equipment (UE) based on a reference subcarrier spacing (SCS) associated with an uplink bandwidth part (BWP) configured for a first random access message;
• means for receiving the first random access message from the UE to initiate a random access channel (RACH) procedure, the first random access message comprising a preamble and a payload, wherein a first time duration of the preamble and a second time duration of the payload are based on the reference SCS, wherein a gap time duration for a transmission gap between the preamble and the payload is based on the random access configuration information and the reference SCS;
• means for processing the first random access message;
• means for generating a second random access response message in response to the first random access message;
• and
• means for transmitting the second random access response message to the UE.

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 random access configuration information for a random access procedure of a user equipment (UE) based on a reference subcarrier spacing (SCS) associated with an uplink bandwidth part (BWP) configured for a first random access message;
• receive the first random access message from the UE to initiate a random access channel (RACH) procedure, the first random access message comprising a preamble and a payload, wherein a first time duration of the preamble and a second time duration of the payload are based on the reference SCS, wherein a gap time duration for a transmission gap between the preamble and the payload is based on the random access configuration information and the reference SCS;
• process the first random access message;
• generate a second random access response message in response to the first random access message;
• and
• transmit the second random response access message to the UE.

A non-transitory computer-readable medium storing computer executable code for wireless communication at a base station, the code when executed by a processor cause the processor to:

• transmit random access configuration information for a random access procedure of a user equipment (UE) based on a reference subcarrier spacing (SCS) associated with an uplink bandwidth part (BWP) configured for a first random access message;
• receive the first random access message from the UE to initiate a random access channel (RACH) procedure, the first random access message comprising a preamble and a payload, wherein a first time duration of the preamble and a second time duration of the payload are based on the reference SCS, wherein a gap time duration for a transmission gap between the preamble and the payload is based on the random access configuration information and the reference SCS;
• process the first random access message;
• generate a second random access response message in response to the first random access message;
• and
• transmit the second random access response message to the UE.