Methods and apparatuses for enhanced dmrs

A base station (BS), comprising:

• a transceiver that:
• transmits multiple MsgA physical uplink shared channel (PUSCH) resource configurations at least including an enhanced MsgA PUSCH resource configuration, wherein the enhanced MsgA PUSCH resource configuration includes an enhanced MsgA demodulation reference signal (DMRS) configuration;
• and
• a processor that is coupled with the transceiver and determines DMRS port(s) based on the enhanced MsgA DMRS configuration;
• wherein the transceiver further receives a MsgA PUSCH transmission and a DMRS for the MsgA PUSCH transmission with a DMRS port within the determined DMRS port(s).

A method performed by a user equipment (UE), comprising:

• receiving multiple MsgA physical uplink shared channel (PUSCH) resource configurations at least including an enhanced MsgA PUSCH resource configuration, wherein the enhanced MsgA PUSCH resource configuration includes an enhanced MsgA demodulation reference signal (DMRS) configuration;
• determining DMRS port(s) based on the enhanced MsgA DMRS configuration;
• and
• transmitting a MsgA PUSCH transmission and a DMRS for the MsgA PUSCH transmission with a DMRS port selected from the determined DMRS port(s).