Method and apparatus for providing channel estimation for single frequency network transmissions in high speed transit scenarios

A method performed by a network entity, the method comprising:

• transmitting a higher layer configuration to configure a user equipment (UE) with two tracking reference signals (TRSs) including a first TRS and a second TRS for transmitting a common communication having a same set of data from multiple signal sources;
• transmitting a downlink scheduling assignment including downlink control information (DCI) in a control channel scheduling a physical downlink shared channel (PDSCH), wherein the downlink scheduling assignment comprises an indication of a transmission configuration indicator (TCI) identifying two TCI states including a first TCI state, which indicates quasi-co-location (QCL) information of a demodulation reference signal (DMRS) corresponding to the PDSCH with the first TRS, and a second TCI state, which indicates QCL information of the DMRS corresponding to the PDSCH with the second TRS, and wherein each of the first TRS and the second TRS corresponds to a non-zero power (NZP) channel state information reference signal (CSI-RS) resource set, which is configured with a higher layer parameter that configures TRS information;
• wherein the QCL information of the DMRS corresponding to the PDSCH with the first TRS is a ‘typeA’ QCL type, and the QCL information of the DMRS corresponding to the PDSCH with the second TRS is the ‘typeA’ QCL type, and wherein the ‘typeA’ QCL type includes Doppler shift, Doppler spread, average delay, and delay spread properties;
• and
• transmitting the PDSCH according to the downlink scheduling assignment including the DCI.

A processor for wireless communication, comprising:

• at least one controller coupled with at least one memory and configured to cause the processor to:
• transmit a higher layer configuration to configure a user equipment (UE) with two tracking reference signals (TRSs) including a first TRS and a second TRS for transmitting a common communication having a same set of data from multiple signal sources;
• transmit a downlink scheduling assignment including downlink control information (DCI) in a control channel scheduling a physical downlink shared channel (PDSCH), wherein the downlink scheduling assignment comprises an indication of a transmission configuration indicator (TCI) identifying two TCI states including a first TCI state, which indicates quasi-co-location (QCL) information of a demodulation reference signal (DMRS) corresponding to the PDSCH with the first TRS, and a second TCI state, which indicates QCL information of the DMRS corresponding to the PDSCH with the second TRS, and wherein each of the first TRS and the second TRS corresponds to a non-zero power (NZP) channel state information reference signal (CSI-RS) resource set, which is configured with a higher layer parameter that configures TRS information;
• wherein the QCL information of the DMRS corresponding to the PDSCH with the first TRS is a ‘typeA’ QCL type, and the QCL information of the DMRS corresponding to the PDSCH with the second TRS is the ‘typeA’ QCL type, and wherein the ‘typeA’ QCL type includes Doppler shift, Doppler spread, average delay, and delay spread properties;
• and
• transmit the PDSCH according to the downlink scheduling assignment including the DCI.