1. QCL configurations in above 6GHz and the necessary RS QCL linkeages
1, 2, 5*
1, 2, 3, 4, 5
Example
Config #1
5* - depends on higher layer
configuration of CSI-RS resource
SS block
CSI-RS BM
PDCCH DMRS
1, 2, 5
Example
Config #2
1, 2, [3, 4], 5
SS block
PDCCH DMRS
Signalling:
RS resource sets and resources configured using RRC
QCL parameter(s) between source RS resource (within a set) and target RS resource (within a set) using RRC
Needs to include
2 port case
1, 2, 5*
Example
Config #3
1, 2, 3, 4, 5
SS block
CSI-RS BM
PDSCH DMRS
TCI states
1, 2 may be more general case covering
also wide SSB beam and narrow CSI-RS beam
Example
Config #4
1, 2, 5
1, 2, 3, 4, 5
SS block
CSI-RS CSI
PDSCH DMRS
When SSB has same
beamwidth as CSI-RS beam A B
B is QCLed to A (configuration in RRC)
CSI reporting
(with CQI)
By DL grant
(with MCS)
Used QCL association for DMRS defined in CORESET and Search Space configuration that indicates the UE when to assume which QCL association between certain RS and DMRS of PDCCH (RRC/MAC-CE)
Example
Config #5
1, 2, 3, 4, 5
SS block
[1, 2]
CSI-RS CSI
PDSCH DMRS 5
When SSB has wider
beamwidth as CSI-RS beam
RRC/MAC-CE configures/updates UE with TCI states table where each TCI state indicates QCL association between certain RS and DMRS of PDSCH. DCI indicates UE which TCI state to use for PDSCH demodulation.
CSI-RS BM
(1) average delay, (2) Doppler shift, (3) delay spread, (4) Doppler spread, (5) spatial RX parameter(s), (6) average gain