Design and consideration for demodulation reference signal and tracking reference signal quasi co-location relationship

An apparatus for wireless communication, comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• receive a single frequency networked composite reference signal at a first port of a user equipment (UE) single frequency networked composite reference signal;
• receive a reference signal at a second port of the UE that is different than the first port of the UE;
• and
• perform channel estimation for at least one of the first port or the second port based at least in part on receiving the single frequency networked composite reference signal and the reference signal.

An apparatus for wireless communication, comprising:

• a processor,
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit a first portion of a single frequency networked composite reference signal from a first port of a first transmit/reception point to a user equipment (UE);
• and
• transmit a downlink control information message to the UE that indicates at least one transmission configuration indicator state identifier comprising information to identify the single frequency networked composite reference signal.