7.1.9 PDSCH resource mapping parameters

36.2133GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Physical layer proceduresRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

A UE configured in transmission mode 10 for a given serving cell can be configured with up to 8 parameter sets by higher layer signaling to decode PDSCH according to a detected PDCCH/EPDCCH with DCI format 2D intended for the UE and the given serving cell. The UE shall use the parameter set according to the value of the ‘PDSCH RE Mapping and Quasi-Co-Location indicator’ field (mapping defined in Table 7.1.9-1 for Type B and defined in Table 7.9.1-1A for Type C quasi co-location) in the detected PDCCH/EPDCCH with DCI format 2D for determining the RE mapping (defined in Clause 6.4 of [3]), and for determining antenna port quasi co-location (defined in Clause 7.1.10) for PDSCH if the UE is configured with Type B quasi co-location type (defined in Clause 7.1.10) or for each PDSCH codeword if the UE is configured with Type C quasi co-location (defined in Clause 7.1.10). If the UE is configured with Type C quasi co-location and not configured with parameter set for codeword 1, the UE shall assume the parameter set for codeword 1 is the same as the parameter set for codeword 0.

For PDSCH without a corresponding PDCCH/EPDCCH, the UE shall use the parameter set indicated in the PDCCH/EPDCCH with DCI format 2D corresponding to the associated SPS activation for determining the RE mapping (defined in Clause 6.4 of [3]) and antenna port quasi co-location (defined in Clause 7.1.10) for PDSCH if the UE is configured with Type B quasi co-location and for each PDSCH codeword if the UE is configured with Type C quasi co-location.

Table 7.1.9-1: PDSCH RE Mapping and Quasi-Co-Location Indicator field in DCI format 2D for Type B quasi co-location

Value of ‘PDSCH RE Mapping and Quasi-Co-Location Indicator’ field	Description
’00’	Parameter set 1 configured by higher layers
’01’	Parameter set 2 configured by higher layers
’10’	Parameter set 3 configured by higher layers
’11’	Parameter set 4 configured by higher layers

Table 7.1.9-1A: PDSCH RE Mapping and Quasi-Co-Location Indicator field in DCI format 2D for Type C quasi co-location

Value of ‘PDSCH RE Mapping and Quasi-Co-Location Indicator’ field	Description
’00’	Parameter set 1 configured by higher layers for codeword 0 and Parameter set 2 configured by higher layers for codeword 1 (if any)
’01’	Parameter set 3 configured by higher layers for codeword 0 and Parameter set 4 configured by higher layers for codeword 1 (if any)
’10’	Parameter set 5 configured by higher layers for codeword 0 and Parameter set 6 configured by higher layers for codeword 1 (if any)
’11’	Parameter set 7 configured by higher layers for codeword 0 and Parameter set 8 configured by higher layers for codeword 1 (if any)

The following parameters for determining PDSCH RE mapping and PDSCH antenna port quasi co-location are configured via higher layer signaling for each parameter set for Type B quasi co-location and parameter set 1,3,5,7 for Type C quasi co-location:

– crs-PortsCount-r11.

– crs-FreqShift-r11.

– mbsfn-SubframeConfigList-r11.

– csi-RS-ConfigZPId-r11.

– pdsch-Start-r11.

– qcl-CSI-RS-ConfigNZPId-r11.

The following parameters for determining PDSCH RE mapping and PDSCH antenna port quasi co-location are configured via higher layer signaling for parameter set 2,4,6,8 for Type C quasi co-location

– crs-PortsCount-v15xy.

– crs-FreqShift-v15xy.

– mbsfn-SubframeConfigList-v15xy.

– csi-RS-ConfigZPId-v15xy.

– pdsch-Start-v15xy.

– qcl-CSI-RS-ConfigNZPId-v15xy.

To decode PDSCH according to a detected PDCCH/EPDCCH with DCI format 1A with CRC scrambled with C-RNTI intended for the UE and the given serving cell and for PDSCH transmission on antenna port 7, a UE configured in transmission mode 10 for a given serving cell shall use the parameter set 1 in table 7.1.9-1 or table 7.1.9-1A for determining the PDSCH RE mapping (defined in Clause 6.4 of [3]), and for determining PDSCH antenna port quasi co-location (defined in Clause 7.1.10) if the UE is configured with Type B or Type C quasi co-location type (defined in Clause 7.1.10).

To decode PDSCH corresponding to detected PDCCH/EPDCCH with DCI format 1A with CRC scrambled with SPS C-RNTI and PDSCH without a corresponding PDCCH/EPDCCH associated with SPS activation indicated in PDCCH/EPDCCH with DCI format 1A, a UE configured in transmission mode 10 for a given serving cell shall use the parameter set 1 in table 7.1.9-1 or table 7.1.9-1A for determining the PDSCH RE mapping (defined in Clause 6.4 of [3]), and for determining PDSCH antenna port quasi co-location (defined in Clause 7.1.10) if the UE is configured with Type B or Type C quasi co-location type (defined in Clause 7.1.10).

If the UE is configured in transmission mode 10 and configured with Type B or Type C quasi co-location and configured with higher layer parameter csi-RS-NZP-mode set to ‘multiShot’ for a CSI process, the UE is not expected to receive a ‘PDSCH RE Mapping and Quasi-Co-Location indicator’ selecting a parameter set with CSI-RS resource configuration for the CSI process identified by the higher layer parameter qcl-CSI-RS-ConfigNZPId-r11 corresponding to a deactivated CSI-RS resource (defined in Clause 7.2.8) or an activated CSI-RS resource (defined in Clause 7.2.8) with no CSI-RS transmission since the activation of the CSI-RS resource.

If the UE is configured in transmission mode 10 and configured with Type B or Type C quasi co-location and configured with higher layer parameter csi-RS-ConfigNZP-ApList and configured with higher layer parameter csi-RS-NZP-mode set to ‘aperiodic’ for a CSI process, the UE is not expected to receive a ‘PDSCH RE Mapping and Quasi-Co-Location indicator’ selecting a parameter set with CSI-RS resource configuration for the CSI process identified by the higher layer parameter qcl-CSI-RS-ConfigNZPId-r11.

To decode PDSCH according to a detected PDCCH/EPDCCH with DCI format 1A intended for the UE on a given serving cell and for PDSCH transmission on antenna port 0 – 3, a UE configured in transmission mode 10 for the given serving cell shall determine the PDSCH RE mapping (as described in Clause 6.4 of [3]) using the lowest indexed zero-power CSI-RS resource.

To decode PDSCH according to a detected SPDCCH with DCI format 7-1 A, 7-1B, 7-1C, 7-1D, 7-1E, 7-1F, 7-1G with CRC scrambled with C-RNTI or retransmission of PDSCH according to a detected SPDCCH with DCI format 7-1 A, 7-1B, 7-1C, 7-1D, 7-1E, 7-1F, 7-1G with CRC scrambled with SPS C-RNTI intended for the UE and the given serving cell, a UE shall use the value of the higher layer parameter rateMatchingMode (for each SPDCCH-PRB set), and the ‘Used/Unused SPDCCH resource indication’ field (if present) in the SPDCCH for determining the PDSCH RE mapping (defined in Clause 6.4 of [3]).

A UE configured with higher layer parameter csi-RS-ConfigZP-ApList for a given serving cell is configured with 4 aperiodic zero-power CSI-RS resources by higher layer signaling to decode PDSCH according to a detected PDCCH/EPDCCH with DCI format 1/1B/1D//2/2A/2B/2C/2D intended for the UE and the given serving cell. The UE shall use the aperiodic zero-power CSI-RS resource according to the value of the ‘ Aperiodic zero-power CSI-RS resource indicator for PDSCH RE Mapping’ field (mapping defined in Table 7.1.9-2) in the detected PDCCH/EPDCCH with DCI format 1/1B/1D/2/2A/2B/2C/2D for determining the PDSCH RE mapping (defined in Clause 6.4 of [3]).

Table 7.1.9-2: Aperiodic zero-power CSI-RS resource indicator for PDSCH RE Mapping field in DCI format 1/1B/1D/2/2A/2B/2C/2D

Value of Aperiodic zero-power CSI-RS resource indicator for PDSCH RE Mapping ‘ field	Description
’00’	Aperiodic zero-power CSI-RS resources 1 configured by higher layers
’01’	Aperiodic zero-power CSI-RS resources 2 configured by higher layers
’10’	Aperiodic zero-power CSI-RS resources 3 configured by higher layers
’11’	Aperiodic zero-power CSI-RS resources 4 configured by higher layers