Methods and apparatuses for multi-TRP transmission

A base station for wireless communication, 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 configuration information for an uplink phase tracking reference signal (PT-RS) and second configuration information indicating a plurality of sounding reference signal (SRS) resource sets, each of the plurality of SRS resource sets being associated with at least one physical uplink shared channel (PUSCH) repetition;
• and
• receive two or more PUSCH repetitions;
• and
• determine a size of a transport block (TB) of each PUSCH repetition based on a maximum number of PT-RS ports among all of the two or more PUSCH repetitions.

A user equipment (UE) for wireless communication, 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 configuration information for an uplink phase tracking reference signal (PT-RS) and second configuration information indicating a plurality of sounding reference signal (SRS) resource sets, each of the plurality of SRS resource sets being associated with at least one physical uplink shared channel (PUSCH) repetition;
• for each PUSCH repetition, determine a number of PT-RS ports for transmitting the uplink PT-RS, wherein the numbers of PT-RS ports for PUSCH repetitions associated with different SRS resource sets are different;
• transmit two or more PUSCH repetitions;
• and
• determine a size of a transport block (TB) of each PUSCH repetition based on a maximum number of PT-RS ports among all of the two or more PUSCH repetitions.

A method performed by a base station, the method comprising:

• transmitting first configuration information for an uplink phase tracking reference signal (PT-RS) and second configuration information indicating a plurality of sounding reference signal (SRS) resource sets, each of the plurality of SRS resource sets being associated with at least one physical uplink shared channel (PUSCH) repetition;
• and
• receiving two or more PUSCH repetitions;
• and
• determining a size of a transport block (TB) of each PUSCH repetition based on a maximum number of PT-RS ports among all of the two or more PUSCH repetitions.