Requesting a waveform change

A user equipment (UE), comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the UE to:
• receive first information indicating configurations for a plurality of waveforms and an indication indicating that the UE is enabled to request a waveform change;
• receive a system information block (SIB) random access channel (RACH) configuration comprising a mapping between a plurality of RACH preambles and the plurality of waveforms;
• transmit a request message to a base station, wherein the request message comprises a RACH preamble of the plurality of RACH preambles corresponding to a waveform of the plurality of waveforms from the mapping in the SIB RACH configuration and requests the waveform change;
• and
• receive a response message from the base station, wherein the response message indicates whether the request for the waveform change is approved.

A base station, comprising:

• at least one memory;
• and
• at least one processor coupled with the at least one memory and configured to cause the base station to:
• transmit first information indicating configurations for a plurality of waveforms and an indication indicating that a user equipment (UE) is enabled to request one or more of a waveform change;
• transmit a system information block (SIB) random access channel (RACH) configuration comprising a mapping between a plurality of RACH preamble and the plurality of waveforms;
• receive a request message from the UE, wherein the request message comprises a RACH preamble of the plurality of RACH preambles corresponding to a waveform of the plurality of waveforms from the mapping in the SIB RACH configuration and requests for the waveform change is approved.

A processor for wireless communication, comprising:

• at least one controller coupled with at least one memory and configured to cause the processor to:
• receive first information indicating configurations for a plurality of waveforms and an indication indicating that the processor is enabled to request a waveform;
• receive a system information block (SIB) random access channel (RACH) configuration comprising a mapping between a plurality of RACH preambles and the plurality of waveforms;
• transmit a request message to a base station, wherein the request message comprises a RACH preamble of the plurality of RACH preambles corresponding to a waveform of the plurality of waveforms from the mapping in the SIB RACH configuration and requests the waveform change;
• and
• receive a response message from the base station, wherein the response message indicates whether the request for the waveform change is approved.