Dynamically convey information of demodulation reference signal and phase noise compensation reference signal
DM-RS symbols may be inserted in the beginning of a subframe, or in two parts of the subframe. In one aspect, a method, a computer-readable medium, and an apparatus for dynamically conveying DM-RS information are provided. The apparatus may be a base station. The apparatus may determine the number of DM-RS symbols and/or the locations within a subframe for transmission of the DM-RS symbols. The apparatus may transmit the number of the DM-RS symbols and/or the locations within the subframe for transmission of the DM-RS symbols to a UE. In another aspect, a UE may receive the number of DM-RS symbols and/or the locations within a subframe for transmission of the DM-RS symbols from a base station. The UE may decode the DM-RS symbols from the subframe based on the number of the DM-RS symbols and/or the locations within a subframe for transmission of the DM-RS symbols.
1. A method of wireless communication of a base station, comprising:
determining at least one of a number of one or more demodulation reference signal (DM-RS) symbols or one or more locations within a subframe for transmission of the one or more DM-RS symbols;
transmitting the at least one of the number of the one or more DM-RS symbols or the one or more locations within the subframe for the transmission of the one or more DM-RS symbols to a user equipment (UE);
determining a resource allocation scheme for a phase noise compensation reference signal (PC-RS), the resource allocation scheme indicating that the PC-RS occupies symbols distinct from the one or more DM-RS symbols within the subframe; and
transmitting the resource allocation scheme for the PC-RS to the UE.
2. The method of claim 1 , wherein the resource allocation scheme for the PC-RS is determined with regard to the one or more DM-RS symbols.
3. The method of claim 1 , wherein the transmitting of the resource allocation scheme for the PC-RS to the UE comprises sending the resource allocation scheme for the PC-RS to the UE dynamically via physical downlink control channel (PDCCH).
4. The method of claim 3 , wherein one or more bits are reserved in downlink control information (DCI) to identify the resource allocation scheme for the PC-RS.
5. The method of claim 1 , wherein the transmitting of the resource allocation scheme for the PC-RS to the UE comprises sending the resource allocation scheme for the PC-RS to the UE via radio resource control (RRC) signaling.
6. The method of claim 1 , wherein the resource allocation scheme informs the UE to rate match the PC-RS around subcarriers of the one or more DM-RS symbols.
7. The method of claim 1 , wherein the resource allocation scheme informs the UE to puncture the one or more DM-RS symbols in subcarriers that are reserved for the PC-RS.
8. The method of claim 1 , wherein the resource allocation scheme informs the UE to puncture the PC-RS in the one or more DM-RS symbols.
9. A method of wireless communication of a base station, comprising:
determining information to be conveyed by a physical downlink control channel (PDCCH);
determining a resource allocation scheme for a phase noise compensation reference signal (PC-RS), the resource allocation scheme indicating that the PC-RS occupies symbols distinct from the one or more demodulation reference signal (DM-RS) symbols to be transmitted within a subframe; and
transmitting the information to a user equipment (UE) via the PDCCH, wherein the PDCCH is punctured to accommodate a phase noise compensation reference signal (PC-RS).
10. The method of claim 9 , wherein the information comprises at least one of a number of the one or more DM-RS symbols or one or more locations within a subframe for transmission of the one or more DM-RS symbols.
11. The method of claim 10 , wherein one or more bits are reserved in downlink control information (DCI) to identify the at least one of the number of the one or more DM-RS symbols or the one or more locations within the subframe for the transmission of the one or more DM-RS symbols.
12. The method of claim 10 , wherein the number of the one or more DM-RS symbols is one, wherein the one or more locations comprise a first symbol of physical downlink shared channel (PDSCH).
13. The method of claim 10 , wherein the number of the one or more DM-RS symbols is two, wherein the one or more locations comprise a first location at a beginning of physical downlink shared channel (PDSCH) and a second location in a middle of the PDSCH, the first location and the second location being separated by at least one symbol.
14. A method of wireless communication of a user equipment (UE), comprising:
receiving at least one of a number of one or more demodulation reference signal (DM-RS) symbols or one or more locations within a subframe for transmission of the one or more DM-RS symbols from a base station;
decoding the one or more DM-RS symbols from the subframe based on the at least one of the number of the one or more DM-RS symbols or the one or more locations;
receiving a resource allocation scheme for a phase noise compensation reference signal (PC-RS), the resource allocation scheme indicating that the PC-RS occupies symbols distinct from the one or more DM-RS symbols within the subframe; and
decoding the PC-RS from the subframe based on the resource allocation scheme for the PC-RS.
15. The method of claim 14 , wherein the resource allocation scheme for the PC-RS is determined with regard to the one or more DM-RS symbols.
16. The method of claim 14 , wherein the receiving of the resource allocation scheme for the PC-RS comprises receiving the resource allocation scheme for the PC-RS dynamically via physical downlink control channel (PDCCH).
17. The method of claim 16 , wherein one or more bits are reserved in downlink control information (DCI) to identify the resource allocation scheme for the PC-RS.
18. The method of claim 14 , wherein the receiving of the resource allocation scheme for the PC-RS comprises receiving the resource allocation scheme for the PC-RS via radio resource control (RRC) signaling.
19. The method of claim 14 , wherein the resource allocation scheme informs the UE to rate match the PC-RS around subcarriers of the one or more DM-RS symbols.
20. The method of claim 14 , wherein the resource allocation scheme informs the UE to puncture the one or more DM-RS symbols in subcarriers that are reserved for the PC-RS.