IE "tci-presentinDCI" in RRC Connection Reconfiguration Message

5G NR
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101

You can check in your configuration.

102

@Indraparin says that it reports csi but without rsrp.
I say that it reports csi with rsrp.
:wink:

103

I think @Indraparin meant the normal RI ,PMI & CQI which can be interpreted as Channel state Information, and not CSI-RI or CRI.

104

Not sure about that.

So, @Indraparin, let’s clarify the confusion/question. :wink:
Do You say that in Huawei you do not see this cri reports with best beams in logs?

105

Exactly, do see it in CSI report?

106

Oh, ok.
So is it sub-1 GHz then?
In sub-1Ghz I also never saw CSI-RSRP.

107

@Indraparin also says that according to configuration just csi beam is reported and rsrp of that beam is not reported.
But then how gNodeB will decide among 4 beams reported which one to use?

108

Nope, it’s Huawei sub-6 with 8 SSB beam.

109

Hi @RFSpecialist, I think better also to check your config to confirm.
I’ve check in some networks.

110

Right, there should definitely be UE measurement reports to gNB about the CSI resource elements.

111

In the example provided above you saw that rsrp is also reported not just the csibeam.

112

This is the one without RSRP, right?

113

Yes, it is.

114

What is the parent tree of this message?

115

Under this:
csi-MeasConfig:- setup
nzp-CSI-RS-ResourceToAddModList

116

Yes, I got the same too:

                   ,
                  reportQuantity cri-RI-PMI-CQI : NULL,
                  reportFreqConfiguration 
                    cqi-FormatIndicator widebandCQI,
                    pmi-FormatIndicator widebandPMI,
                    csi-ReportingBand subbands17 : '11111111 11111111 1'B
                   ,
                  timeRestrictionForChannelMeasurements configured,
                  timeRestrictionForInterferenceMeasurements configured,
                  codebookConfig 
                    codebookType type1 : 
                        subType typeI-SinglePanel : 
                            nrOfAntennaPorts two : 
                                twoTX-CodebookSubsetRestriction '111111'B
                               ,
                            typeI-SinglePanel-ri-Restriction '00000011'B
                           ,
                        codebookMode 1
                   ,
                  groupBasedBeamReporting disabled : 
                     ,
                  cqi-Table table1,
                  subbandSize value1
                 ,
                  reportConfigId 2,
                  resourcesForChannelMeasurement 10,
                  reportConfigType periodic : 
                      reportSlotConfig slots320 : 169,
                      pucch-CSI-ResourceList 
                          uplinkBandwidthPartId 1,
                          pucch-Resource 12
                     ,
                  reportQuantity ssb-Index-RSRP : NULL,
                  reportFreqConfiguration 
                    cqi-FormatIndicator widebandCQI,
                    pmi-FormatIndicator widebandPMI

Though it is not explicitly mentioned in reporting quantity as CSI-RSRP , the Ue reports the same in MAC CSF Info.
Now someone have to answer why this happens :disappointed_relieved:.

117

So guys, let’s sumarize a bit 2 days of discusions. :slight_smile:

Now it is clear how it happens (CSI-RS beams or SSB beams used for beam switching in mobility) for other vendors, it is not clear how it happens for Huawei.

Key IE is this one:
image

This is from 3GPP possible values for reportquantity IE.

All the other IE (like TCI-present in DCI, TRS-info and periodic) are correlated with this IE.

Here is an example for each case:

image

image

Rrc connection reconfiguration from 2 different vendors.

119

After beam switching , is RACH with new SSB/CSI-RS required or not required ?