Methods, apparatuses, and systems for multi-point, multi-cell single-user based multiple input and multiple output transmissions
Methods, systems, and storage media for providing multi-cell, multi-point single user (SU) multiple input and multiple output (MIMO) operations are described. In embodiments, an apparatus may receive and process a first set of one or more independent data streams received in a downlink channel from a first transmission point. The apparatus may receive and process a second set of one or more independent data streams received in a downlink channel from a second transmission point. The apparatus may process control information received from the first transmission point or the second transmission point. The control information may include an indication of a quasi co-location assumption to be used for estimating channel characteristics for reception of the first set of one or more independent data streams or the second set of one or more independent data streams. Other embodiments may be described and/or claimed.
1. One or more non-transitory computer-readable storage media (NTCRSM) comprising instructions, wherein execution of the instructions by one or more processors of a user equipment (UE) is to cause the UE to:
control receipt of a Downlink Control Information (DCI) format 2D message, wherein the DCI format 2D message is to include a Physical Downlink Shared Channel (PDSCH) Resource Element (RE) Mapping and Quasi-Co-Location indicator field, wherein a value in the PDSCH RE Mapping and Quasi-Co-Location indicator field is to indicate one or two parameter sets to be used to decode a PDSCH;
determine, using one parameter set based on the value in the PDSCH RE Mapping and Quasi-Co-Location indicator field, a resource element (RE) mapping and an antenna port quasi co-location (QCL) for the PDSCH when a configured QCL type is a first QCL type; and
determine, using the two parameter sets based on the value in the PDSCH RE Mapping and Quasi-Co-Location indicator field, the RE mapping and the antenna port QCL for each PDSCH codeword of the PDSCH when the configured QCL type is a second QCL type.
2. The one or more NTCRSM of claim 1 , wherein, to determine the antenna port QCL, execution of the instructions by the one or more processors is to cause the UE to:
determine the RE mapping and the antenna port QCL for each PDSCH codeword of the PDSCH when the configured QCL type is the second QCL type and when the UE is configured in transmission mode 10.
3. The one or more NTCRSM of claim 1 , wherein execution of the instructions by the one or more processors is to cause the UE to:
determine the antenna port QCL for the PDSCH when the value in the PDSCH RE Mapping and Quasi-Co-Location indicator field indicates one set of parameters for determination of reference signal positions, wherein values of the one set of parameters are used for all antenna ports and the PDSCH is transmitted in one or more resource blocks indicated by the DCI format 2D message.
4. The one or more NTCRSM of claim 3 , wherein the reference signal positions comprise cell-specific reference signal positions or channel state information reference signal positions.
5. The one or more NTCRSM of claim 1 , wherein execution of the instructions by the one or more processors is to cause the UE to:
determine the antenna port QCL for each PDSCH codeword when the value in the PDSCH RE Mapping and Quasi-Co-Location indicator field indicates two sets of parameters for determination of reference signal positions, wherein a first set of parameters of the two sets of parameters are to be used for a set of antenna ports associated with a first PDSCH codeword, and a second set of parameters of the two sets of parameters are to be used for a set of antenna ports associated with a second PDSCH codeword.
6. The one or more NTCRSM of claim 5 , wherein the reference signal positions comprise cell-specific reference signal positions or channel state information reference signal positions.
7. The one or more NTCRSM of claim 1 , wherein execution of the instructions by the one or more processors is to cause the UE to:
control receipt of a Radio Resource Control (RRC) message, wherein the RRC message is to configure the QCL type of the UE; and
determine the configured QCL type based on the RRC message.
8. The one or more NTCRSM of claim 1 , wherein the DCI format 2D message corresponds to an associated semi-persistent scheduling (SPS) activation, and wherein execution of the instructions by the one or more processors is to cause the UE to:
determine, using a parameter set indicated in the DCI format 2D message when the PDSCH does not correspond to a Physical Downlink Control Channel (PDCCH) or an Enhanced PDCCH (EPDCCH), the RE mapping and the antenna port QCL for the PDSCH when the configured QCL type is the first QCL type; and
determine, using a parameter set indicated in the DCI format 2D message when the PDSCH does not correspond to a PDCCH or an EPDCCH, the RE mapping and the antenna port QCL for each PDSCH codeword of a set of PDSCH codewords when the configured QCL type is the second QCL type.
9. The one or more NTCRSM of claim 1 , wherein execution of the instructions by the one or more processors is to cause the UE to:
determine that antenna ports corresponding to a channel state information reference signal (CSI-RS) resource configuration and antenna ports associated with the PDSCH are quasi co-located with respect to Doppler shift, Doppler spread, average delay, and delay spread when the configured QCL type is the first QCL type; and
determine that the antenna ports corresponding to the CSI-RS resource configuration and antenna ports associated with each PDSCH codeword are quasi co-located with respect to Doppler shift, Doppler spread, average delay, and delay spread when the configured QCL type is the second QCL type.
10. The one or more NTCRSM of claim 1 , wherein execution of the instructions by the one or more processors is to cause the UE to:
detect the DCI format 2D message in a Physical Downlink Control Channel (PDCCH) or an Enhanced PDCCH (EPDCCH).
11. An apparatus to be employed as a user equipment (UE), the apparatus comprising:
radiofrequency (RF) circuitry to receive a Downlink Control Information (DCI) format 2D message, wherein the DCI format 2D message is to include a Physical Downlink Shared Channel (PDSCH) Resource Element (RE) Mapping and Quasi-Co-Location indicator field, wherein a value in the PDSCH RE Mapping and Quasi-Co-Location indicator field is to indicate one or two parameter sets to be used to decode a PDSCH; and
baseband circuitry coupled with the RF circuitry, the baseband circuitry to:
determine, using one parameter set based on the value in the PDSCH RE Mapping and Quasi-Co-Location indicator field, a resource element (RE) mapping and an antenna port quasi co-location (QCL) for the PDSCH when a configured QCL type is a first QCL type; and
determine, using two parameter sets based on the value in the PDSCH RE Mapping and Quasi-Co-Location indicator field, the RE mapping and the antenna port QCL for each PDSCH codeword of the PDSCH when the configured QCL type is a second QCL type.
12. The apparatus of claim 11 , wherein, to determine the antenna port QCL, the baseband circuitry is to:
determine the RE mapping and the antenna port QCL for each PDSCH codeword of the PDSCH when the configured QCL type is the second QCL type and when the UE is configured in transmission mode 10.
13. The apparatus of claim 11 , wherein the baseband circuitry is to:
determine the antenna port QCL for the PDSCH when the value in the PDSCH RE Mapping and Quasi-Co-Location indicator field indicates one set of parameters for determination of reference signal positions, wherein values of the one set of parameters are used for all antenna ports and the PDSCH is transmitted in one or more resource blocks indicated by the DCI.
14. The apparatus of claim 13 , wherein the reference signal positions comprise cell-specific reference signal positions or channel state information reference signal positions.
15. The apparatus of claim 11 , wherein the baseband circuitry is to:
determine the antenna port QCL for each PDSCH codeword when the value in the PDSCH RE Mapping and Quasi-Co-Location indicator field indicates two sets of parameters for determination of reference signal positions, wherein
a first set of parameters of the two sets of parameters are to be used for a set of antenna ports associated with a first PDSCH codeword, and
a second set of parameters of the two sets of parameters are to be used for a set of antenna ports associated with a second PDSCH codeword.
16. The apparatus of claim 15 , wherein the reference signal positions comprise cell-specific reference signal positions or channel state information reference signal positions.
17. The apparatus of claim 11 , wherein:
the RF circuitry is to receive a Radio Resource Control (RRC) message, wherein the RRC message is to configure the QCL type of the UE; and
the baseband circuitry is to determine the configured QCL type based on the RRC message.
18. The apparatus of claim 11 , wherein the DCI format 2D message corresponds to an associated semi-persistent scheduling (SPS) activation, and wherein the baseband circuitry is to:
determine, using a parameter set indicated in the DCI format 2D message when the PDSCH does not correspond to a Physical Downlink Control Channel (PDCCH) or an Enhanced PDCCH (EPDCCH), the RE mapping and the antenna port QCL for the PDSCH when the configured QCL type is the first QCL type; and
determine, using a parameter set indicated in the DCI format 2D message when the PDSCH does not correspond to a PDCCH or an EPDCCH, the RE mapping and the antenna port QCL for each PDSCH codeword using the two parameter sets when the configured QCL type is the second QCL type.
19. The apparatus of claim 11 , wherein the baseband circuitry is to:
determine that antenna ports corresponding to a channel state information reference signal (CSI-RS) resource configuration and antenna ports associated with the PDSCH are quasi co-located with respect to Doppler shift, Doppler spread, average delay, and delay spread when the configured QCL type is the first QCL type; and
determine that the antenna ports corresponding to the CSI-RS resource configuration and antenna ports associated with each PDSCH codeword are quasi co-located with respect to Doppler shift, Doppler spread, average delay, and delay spread when the configured QCL type is the second QCL type.
20. The apparatus of claim 11 , wherein the baseband circuitry is to:
control detection of the DCI format 2D message in a Physical Downlink Control Channel (PDCCH) or an Enhanced PDCCH (EPDCCH).