3GPP TSG-RAN WG1 Meeting #121	R1-2503276
St Julian’s, Malta, May 19th – 23rd, 2025

Agenda Item:	9.2.2
Source:	Huawei, HiSilicon
Title:	On 128 CSI-RS ports and UE reporting enhancements
Document for:	Discussion and Decision 

Conclusions
The contribution provides our considerations on 128 CSI-RS ports and UE reporting enhancements for CJT, and the observations are listed as following:
Observation 1: For multi-beam channel measurement, the CSI-RS overhead is pretty high if each analog beam is associated with a separate CSI-RS resource.  
Observation 2: Under intra-band CA scenario, per-CC independent CSI reporting may lead to spectrum efficiency degradation.
The proposals are listed as below:
Proposal 1: UE can report to support both Scheme-B RI=1-4 and Scheme-A RI=5-8, or both Scheme-A RI=1-4 and Scheme-B RI=5-8.
Proposal 2: For the Rel-19 Type-I SP codebook refinement for P=128 CSI-RS ports based on periodic CSI-RS, with Capability 2 timeline, the periodicity of CSI-RS should be greater than or equal to  slot. 
Proposal 3: For multi-beam channel measurement, transmitting less CSI-RS resources than the total number of analog beams should be considered to reduce the CSI-RS overhead.
Proposal 4: For CQI/PMI/RI calculation for CJT CSI linked with DO reports, the PDSCH is assumed to be transmitted according to

Where  is the selected CSI-RS resource, k is the subcarrier index,  is the reference subcarrier,  is the subcarrier spacing and  is the DO. 

The text proposals for the draft CR are listed as below:
Text Proposal 1: For the Rel-19 Type-II codebook refinement for 48, 64, and 128 CSI-RS ports, reuse two-level group based CBSR of regular Type-II codebook, and endorse the following text proposal.

Text Proposal 2: Endorse the following text proposal to CR of TS 38.214:

Text Proposal 3: Endorse the following text proposal for the agreed draft CR of TS 38.214:

Text Proposal 4: Endorse the following text proposal for the agreed draft CR of TS 38.215:

Text Proposal 5: Endorse the following text proposal for the agreed draft CR of TS 38.214:

3GPP TSG RAN WG1 #121	R1-2503352
St Julian’s, Malta, May 19th – 23th, 2025

Source:	vivo
Title:	Remaining issues on Rel-19 CSI enhancements
Agenda Item:	9.2.2
Document for:	Discussion and Decision

Conclusions 
To summarize, we have the following proposals and observations.
Observation 1:	KDOPP = {4, 8, 12} CSI-RS resource groups are introduced for Type-II Doppler CSI. This means that within a CMR group, there may be multiple CSI-RS ports with the same CSI-RS port index mapped to different antenna ports.
Proposal 1: For Rel-19 Type-II Doppler codebooks, CSI-RS ports mapped to the same port index for CSI/PMI calculation across the K aperiodic CSI-RS resources share the same antenna port.
Proposal 3: For CJTC-Dd reporting of delay offset, support that the symbols of subframes associated with the NTRP configured CSI-RS resource sets used for tracking are used for CP calculation.
Proposal 4: For CJTC-F reporting of frequency offset, support the reference frequency in relation to ppm is the frequency of Point A.
Proposal 6: Support a unified design, i.e., the number of CSI-RS resource sets for CJTC-Dd report is the same as the number of CSI-RS resources for CJT CSI report, regardless of separate triggering and joint triggering.
To summarize, we have the following text proposals.
Proposal 2: Adopt the following TP in CR of TS 38214 for the UE configured with codebookType set to 'typeII-Doppler-r19'.

Proposal 5:	Adopt the following TP in CR of TS 38214 to make the values of Dd and FO clearer.

Proposal 7: Adopt the following TP in CR of TS 38214 to make a unified design for separate triggering and joint triggering.

3GPP TSG RAN WG1 #121			       R1-2503434
Malta, MT, May 19th – 23rd, 2025

Agenda Item:		9.2.2
Source:				InterDigital, Inc.
Title:						Remaining Details of Rel-19 Enhancements of CSI
Document for:		Discussion and Decision

Conclusions
In this contribution, we discussed the scope of enhancements for Objectives 2. We make the following observations and proposal for CSI:

Observation 1: The triggering offset of the aperiodic CSI-IM associated with the  CSI-RS resources, when the  CSI-RS resources are in two consecutive slots is not yet finalized.

Proposal 1: The triggering offset of the aperiodic CSI-IM follows the associated CSI-RS(s) for CMR in the first slot of the first CSI-RS resource group.

Observation 2: The number of bits is erroneously entered as , where instead, it should be .
Proposal 2: Adopt the following changes in the CR for 38.214: 
Reason of change: To correct a typo.
Summary of change: A wrong variable, i.e.,  is used instead of  in defining the length of a bit sequence.
Consequences if not approved: The length of a CBSR bit sequence when 3-bit scaling is configured will be incorrect. 

Suggested edits:

3GPP TSG RAN WG1 #121		          R1-2503510
St Julian’s, Malta, May 19th – 23th, 2025
Agenda Item:     9.2.2
Source:	Spreadtrum, UNISOC
Title:	Remaining issues on CSI enhancements 
Document for:	Discussion and decision

Conclusion
In this contribution, we provided our views on the details of the remaining issues on CSI enhancements. The following proposals are made:
Type-I and Type-II codebook refinement for up to 128 CSI-RS ports
Proposal: For the Rel-19 Type-II Doppler codebook refinement for 48, 64, and 128 CSI-RS ports, when the K>1 aggregated NZP aperiodic CSI-RS resources in each resource group for CMR are within two consecutive slots, the triggering offset of the associated aperiodic CSI-IM follows the associated NZP CSI-RS resource(s) in the first resource group for CMR in the first slot.

3GPP TSG RAN WG1 #121							R1-2503555
St Julian, Malta, May 19th – 23rd, 2025

Agenda item:	9.2.2
Source: 	Moderator (Samsung)
Title: 	Moderator Summary#1 on Rel-19 CSI enhancements: Round 1
Document for:	Discussion and Decision

Summary: issue 3 

Table 3B LLS/SLS results: issue 3 
--
Table 3C Additional inputs: issue 3

3GPP TSG RAN WG1#121			R1-2503556
Malta, MT, May 19th – May 23th, 2025

Agenda item:	9.2.2
Source: 	Samsung
Title: 	Views on Rel-19 CSI enhancements
Document for:	Discussion and Decision

Conclusion
In this contribution, the following observations and proposals are made: 

Type-I/II

Proposal 1: 
For the Rel-19 Type-I and Type-II (except for Type-II Doppler) codebook refinement for 48, 64, and 128 CSI-RS ports, when the K>1 aggregated NZP aperiodic CSI-RS resources for CMR are within two consecutive slots, the triggering offset configured with the NZP CSI-RS resource set including an associated aperiodic NZP CSI-RS resource for interference measurement is the same as that of the associated NZP CSI-RS resource(s) for CMR in the first slot.


Proposal 2: 
For the Rel-19 Type-II codebook refinement for 48, 64, and 128 CSI-RS ports based on the Rel-18 Type-II Doppler codebook, when the  CSI-RS resource groups are configured for aperiodic CMR, where each CSI-RS resource group comprises K>1 aggregated NZP aperiodic CSI-RS resources, the triggering offset of the associated aperiodic CSI-IM follows the associated NZP CSI-RS resource(s) for CMR in the last slot.

Proposal 3: 
For the Rel-19 Type-II codebook refinement for 48, 64, and 128 CSI-RS ports based on the Rel-18 Type-II Doppler codebook, when the  CSI-RS resource groups are configured for aperiodic CMR, where each CSI-RS resource group comprises K>1 aggregated NZP aperiodic CSI-RS resources, the triggering offset configured with the NZP CSI-RS resource set including an associated aperiodic NZP CSI-RS resource for interference measurement is the same as that of the associated NZP CSI-RS resource(s) for CMR in the last slot.


CRI-based CSI

Proposal 4: Support the priority rules and updating of priority equation in Proposal 2.B for Rel-19 CRI based CSI refinement for up to 128 ports



References

3GPP TSG RAN WG1 Meeting #121	R1-2503669
St Julian's, Malta, May 19th –23rd, 2025

Source:	ZTE Corporation, Sanechips
Title:	Discussion on CSI enhancements
Agenda Item:	9.2.2
Document for:	Discussion and Decision

Conclusion
In summary, we have the following observations and proposals for CSI enhancement:
Proposal 1: For the Rel-19 Type-II Doppler codebook refinement for 48, 64, and 128 CSI-RS ports, when  NZP CSI-RS resource groups of  aperiodic NZP CSI-RS resources each are configured for CMR, the triggering offset of the associated CSI-IM follows the NZP CSI-RS resource(s) for CMR in the first slot of the first NZP CSI-RS resource group.
Proposal 2: For the Rel-19 Type-I SP codebook refinement for 48, 64, and 128 CSI-RS ports, for Scheme-A RI=5-8, except for the first SD basis vector, each of the other SD basis vectors is indicated by one SD basis vector group indicator i3 and three SD basis vector indicators.
If i3=0, the bitwidth of the three SD basis vector indicators are ,  and , respectively;
If i3=1, the bitwidth of the three SD basis vector indicators are ,  and , respectively.
Proposal 3: For CSI-RS resource aggregation to support up-to-128-port CSI-RS, avoid introducing the new concept ‘port index for CSI/PMI calculation’, and directly specify the mapping relationship from CSI-RS sequences in each CDM group of each aggregated CSI-RS resources to antenna ports.
Proposal 4: For the Rel-19 Type-II codebook refinement for 48, 64, and 128 CSI-RS ports, keep the two-level CBSR structure, and introduce group based CBSR for the second level.
The CBSR forms bit sequence ;
 selects four SD basis vector groups from  SD basis vector groups, where each SD basis vector group includes  consecutive SD basis vectors ( and  consecutive SD basis vectors in  and  directions, respectively);
, where  corresponds to the k-th SD basis vector group selected by , and  includes  bits with each bit associated with  consecutive SD basis vectors in the group ( and  consecutive SD basis vectors in  and  directions, respectively).
Proposal 5: For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, when a linkage between CJTC Dd and Rel-18 eType-II CJT CSI report configurations is configured with two separate triggers, introduce a UE capability of maximum buffering time of the CJTC Dd report.
This issue should be discussed in the UE feature session.
Proposal 6: For the Rel-19 aperiodic standalone CJT calibration reporting, support introducing new precoding assumption(s) for UE-specific DO/FO pre-compensated CJT.
If DO is pre-compensated, the precoding assumption can be expressed as

If FO is pre-compensated, the precoding assumption can be expressed as

Text proposal 1: Adopt the following text changes in section 5.2.2.5 of TS 38.214 and section 6.3.1.1.2 of TS 38.212.
Text proposal 2: Adopt the following text changes in section 7.4.1.5.3 of TS 38.211 and sections 5.2.2.2.1a, 5.2.2.2.2a, 5.2.2.2.5a, 5.2.2.2.9a and 5.2.2.2.11a of TS 38.214.
Text proposal 3: Adopt the following text change in sections 5.2.2.2.5a and 5.2.2.2.11a of TS 38.214.

3GPP TSG RAN WG1 #121              						R1- 2503711
Malta, MT, May 19th – May 23rd, 2025

Agenda item:	      9.2.2
Source:	      Tejas Networks Ltd	
Title:		      CSI enhancement for NR MIMO Phase 5
Document for:     Discussion and Decision

Conclusions
In this section we provide a summary of our observations and proposals.
When M CRI based CSI reporting is introduced (with MR configured or not configured) in CSI multi-CRI reporting, the priority criteria associated with the nth report should be redefined as a function of the number of reported beams in a single CSI reporting instance.  In presence of resource contention and UCI omission, this weighing helps to manage CSI omission more efficiently as compared to legacy and improves the overall beam management performance of the network.
Ordering the first to last CRIs within the reported M-MR CRIs is beneficial during UCI packing and omission. And specifying the ordering of M CRIs including MR non-reported CRIs and M-MR reported CRIs is useful for spec completeness.
For the Rel-19 SRS port grouping feature, support the following enhancements to UE sounding procedure for DL CSI acquisition, generalized as; 
For xTyR, SRS resource set(s) configured with resourceType in SRS-ResourceSet set to 'periodic' or 'semi-persistent' 'aperiodic', with y/x or a total of y/x resources, the x SRS ports of each resource in the set(s) are associated with different UE antenna ports, where x/2 UE antenna ports among the x different UE antenna ports are associated with a different UE SRS port group than the SRS port group of the other x/2 antenna ports and the x different antenna ports follow consecutive port numbering if the UE is configured with SRS port grouping. 
For the Rel-19 SRS port grouping feature, support the relevant enhancements to UE sounding procedure for DL CSI acquisition. One example specification change in TS38.214 can be; 
Note: It is up to the editor how this is captured in the specification
For the Rel-19 CRI-based CSI refinement for up to 128 CSI-RS ports, regarding packing order of NRep CSI reports,
For reports with non-M CRI based CSI reports (Legacy CSI reports till Rel-18) should have higher priority over M CRIs based CSI reports.
For reports configured with MR resources should have higher priority over reports with non-MR based CSI reports. 
For reports with lower M values should have higher priority over higher M CRIs based CSI reports. 
        
       where 
m = 0 for non-M CRI based CSI reports. = 1 (legacy CSI reports up to Rel-18), 
m = 1 for M CRI based CSI reports.  is the maximum number of CRIs configured for multi-CRI CSI reports not carrying L1-RSRP or L1-SINR.
       Note: It is up to the editor how this is captured in the specification
For the Rel-19 CRI-based CSI refinement for up to 128 CSI-RS ports, regarding UCI omission for the UCI reported in CSI part-2, support the following method for assigning priority levels (from higher to lower) to multiple CRIs in a single CSI instance.
For the non-reported MR CRIs, priority order is assigned based on the RRC configured order of MR.  
For the reported M-MR CRIs (or M CRIs if MR is not configured), priority order is assigned based on the beam quality measure and not based on the RRC configured order of resource config ids. 
                                Note: It is up to the editor how this is captured in the specification
For the Rel-19 CSI draft CR for 38.211, support to further study and define CSI-RS port mapping method for multi-panel Type-I codebook.
For the Rel-19 CSI draft CR for 38.214, support to add description to explicitly indicate that Group 1 CSI or Part 2 subband CSI of even subbands for any CSI report, inclusive of all CRIs, is not having a lower priority over Group 2 CSI or Part 2 subband CSI of odd subbands for the same CSI report, inclusive of all CRIs.





For the Rel-19 CSI draft CR for 38.214, support to enhance the text description and Table for priority reporting levels for Part 2 CSI for CSI omission as follows, to best align the agreements and the spec description. 
Table 5.2.3-1B: Priority reporting levels for Part 2 CSI for multi-CRI 

3GPP TSG RAN WG1 #121	                            	                          R1-2503787
St Julian’s, Malta, May 19th – 23rd, 2025

Source:	CATT
Title:	Remaining issues on Rel-19 CSI enhancements
Agenda Item:	9.2.2
Document for:	Discussion and Decision

Conclusion
In this contribution, we provided our views remaining details on Rel-19 CSI enhancements. Finally, we made the following proposals:
Observation 1: For the Rel-19 aperiodic standalone CJT calibration reporting, with current description, when ReportQuantity is ‘cjtc-Dd’, apart from the RRC configuration of parameter linkedCJTCReport, the linkage also depends on the DCI information, which is not aligned with the previous agreement.
Proposal 1: For aperiodic triggering offset configuration of CSI-IM for Rel-19 Type-II Doppler codebook, the aperiodic triggering offset, if configured, follows the offset of the associated NZP CSI-RS resource with the lowest CSI-RS resource ID for channel measurement.
Proposal 2: For the Rel-19 aperiodic standalone CJT calibration reporting, adopt the following TP for TS38.214:
--------------------------------------- Start of TP for TS38.214------------------------------------------
5.2.1.4.2	Report quantity configurations

If the UE is configured with a CSI-ReportConfig with the higher layer parameter reportQuantity set to 'cjtc-Dd',
-	the UE selects and reports a reference CSI-RS resource set, nref, from the  configured CSI-RS resource sets for tracking.
-	The UE reports an indication of the delay offset, , associated with each configured CSI-RS resource set , relative to the reference CSI-RS resource set, nref, by indicating the interval  the delay offset falls into, as described in Clause 5.2.1.4.6. For the reference CSI-RS resource set, nref, the value of  is assumed zero and it is not reported.
-	The UE reports a one-bit indication, , for each configured CSI-RS resource set , where  is equal to '1' if the corresponding delay offset, relative to the reference CSI-RS resource set, nref, plus delay spread, is not larger than the length of the cyclic prefix for symbols other than 0 and , or '0' otherwise. For the reference CSI-RS resource set, nref, the value of  is assumed one and it is not reported.
-	Subject to UE capability, the CSI-ReportConfig with reportQuantity set to 'cjtc-Dd' can be linked, by the higher layer parameter linkedCJTCReport, to an aperiodic CSI-ReportConfig with reportQuantity set to 'cri-RI-PMI-CQI' and codebookType set to 'typeII-CJT-r18' and with the corresponding CSI-RS resources for channel measurement that are aperiodic. The CSI-RS resource sets associated with the CJTC-Dd report are linked to the CSI-RS resources associated with the 'typeII-CJT-r18' report by a fixed correspondence between the resource set IDs and resource IDs, respectively, in sequential order of configuration in their respective Resource Setting.

--------------------------------------- End of TP for TS38.214----------------------------------------
Proposal 3: For the Rel-19 aperiodic standalone CJT calibration reporting, when ReportQuantity is ‘cjtc-Dd-F’, support configuring a UE to perform PMI calculation for the Rel-18 eType-II CJT CSI report assuming pre-compensation using only the reported delay offset.
Reuse all the mechanisms of linking CJTC-Dd report and CJT eType-II report, including separate triggering and joint triggering.
CJT CSI pre-compensation based on frequency offset is not supported.
Proposal 4: For the Rel-19 aperiodic standalone CJT calibration reporting, when ReportQuantity is ‘cjtc-P’ (DL/UL phase offset) and time-domain measurement restriction is not configured, N occasions of NTRP CSI-RS resources can be used to measure DL phase offsets.
N is configured by the network or predefined by the specification.
Proposal 5: For the Rel-19 aperiodic standalone CJT calibration reporting, adopt the following TP for TS38.214:
--------------------------------------- Start of TP for TS38.214------------------------------------------
5.2.1.4.1	Resource Setting configuration

For aperiodic CSI, a UE configured with a CSI-ReportConfig with the higher layer parameter reportQuantity set to 'cjtc-Dd', 'cjtc-F', 'cjtc-Dd-F' or 'cjtc-P' is expected to be configured with one CSI Resource Setting (given by higher layer parameter resourcesForChannelMeasurement). For reportQuantity set to 'cjtc-Dd', 'cjtc-F' or 'cjtc-Dd-F', the CSI Resource Setting is periodic with  CSI-RS Resource Sets configured with higher layer parameter trs-Info. For reportQuantity set to 'cjtc-P', the CSI Resource Setting is configured with single-port CSI-RS Resources. Each of  CSI-RS Resources or Resource Sets are configured with a TCI-state by higher layer signalling. The UE expects that all the CSI-RS resources are configured with the same bandwidth. A UE is not expected to be configured with interference measurement on CSI-IM and/or NZP-CSI-RS.

--------------------------------------- End of TP for TS38.214----------------------------------------

3GPP TSG RAN WG1 #121			R1-2503825
St Julian’s, Malta, May 19th – 23rd, 2025

Source: 	CMCC
Title:	Discussion on CSI enhancements
Agenda item:	9.2.2
Document for:	Discussion & Decision

Conclusions
In this contribution, we discuss CSI enhancements in MIMO, including support for up to 128 CSI-RS ports on FR1 and UE reporting enhancement for CJT calibration, and the following proposals are made.
Proposal 1: For the Rel-19 Type-II Doppler codebook refinement for 48, 64, and 128 CSI-RS ports, when configured with  CSI-RS resource groups of  aperiodic CSI-RS resources each, the triggering offset of the associated aperiodic CSI-IM should follow the associated NZP CSI-RS resource(s) for CMR in the first slot of the first CSI-RS resource group in time, i.e. the first NZP CSI-RS resource for CMR in all the  CSI-RS resources.
Proposal 2: For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, when linking CJTC Dd and Rel-18 eType-II CJT CSI reports is configured, regarding linking the CMRs in the two CSI Report Settings, for joint triggering, the UE expects that the number of configured CSI-RS resources associated with the Rel-18 eType-II CJT CSI is always the same as the number of TRS resource sets associated with the Rel-19 CJTC Dd report.
Text Proposal 1: Endorse the following text proposal for the agreed draft CR of TS 38.214:

3GPP TSG RAN WG1 #121	R1-2503860
Malta, 19 – 23 May 2025 


Agenda item:		9.2.2
Source:	Rakuten
Title:	Discussion on the Remaining Issues of CSI Enhancement
Document for:		Discussion and Decision

Conclusion and Proposals
Based on the discussion above, we conclude this contribution with the following observations and proposals:.
Proposal 1: Accept Proposal 1.E in the RAN1 #120’s offline discussions, excluding the FFS.
Proposal 2: Accept Proposal 3.A in the RAN1 #120bis’s offline discussions.
Proposal 3: For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, when linking CJTC Dd and Rel-18 eType-II CJT CSI reports is configured, if reporting a DO value Dn,offset that falls into the interval , the NW uses  as the delay offset value for compensating the associated CJT CSI reporting.
Proposal 4: For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, when linking CJTC Dd and Rel-18 eType-II CJT CSI reports is configured, if reporting a DO value Dn,offset that represents ‘out of range’, at least for joint triggering, the UE uses  as the delay offset value for compensating the associated CJT CSI reporting.

3GPP TSG RAN WG1 #121                              	                       R1-2503877
St Julian’s, Malta, May 19th – 23rd, 2025

Agenda Item:	9.2.2
Source:	Xiaomi 
Title:                     Further discussion on the remained issues for CSI enhancement 
Document for:	Discussion and Decision

Conclusion
In this contribution, the proposals on CSI enhancement for up to 128 ports are provided as follows.
Proposal 1: Don’t support one-level beam-group-based CBSR where (as agreed) each of the  bits is associated with a set of X1X2 SD basis vectors.
Proposal 2:  The following two alternatives on slot offset of aperiodic CSI-IM could be considered.
Alt1:  The triggering offset of the associated A-CSI-IM follows the associated A-CSI-RS resource(s) for CMR in the first slot in the -th resource group, where .
Alt2: The triggering offset of the associated A-CSI-IM follows the associated A-CSI-RS resource(s) with smallest or largest resource ID for CMR. 

3GPP TSG RAN WG1 Meeting #121	                                                                              R1-2503910           
St Julian’s, Malta, May 19th – 23rd, 2025   

Agenda Item:  	9.2.2
Source:             	Fraunhofer IIS, Fraunhofer HHI
Title:                  	CSI enhancements for Rel. 19 MIMO
Document for: 		Decision			

Conclusion
Observation 1: Due to the wide beamwidth of the DFT beams for smaller number of ports, using Rel. 19 Type-I codebooks may not result in performance improvement compared to Rel. 15 Type-I codebook.
Proposal 1: Rel. 19 Type-I codebook shall not be supported for less than 32 ports. 
Observation 2: The current agreements on CBSR seems to be incomplete leading to two different interpretations.
Proposal 3: Agree that the -bit group-based CBSR is related to each group in the second stage bitmap .
Proposal 3: Agree that the -bit group-based bitmap is identical for all  groups. 

3GPP TSG RAN WG1 #121	R1-2503913
St Julian’s, Malta, May 19th – 23rd, 2025

Source:	Lenovo
Title:	Discussion on CSI enhancements
Agenda Item:	9.2.2
Document for:	Discussion and Decision

Conclusion 1.B.4, i.e., no CBSR scheme is supported for Rel-19 Type-II codebook refinement for 48, 64, and 128 CSI-RS ports.
Add ‘typeI-SinglePanel-r19’ as a candidate codebookType for each sub-configuration in the case of mixed codebook combination.
For CJT calibration feedback reporting, we have the following proposals:
For separate triggering of Rel-19 CJTC Dd report type with Rel-18 Type-II CJT report type, the linkage of the two report types spans NR CSI reports corresponding to the same CSI report configuration.
CSI calculation based on Rel-15 Type-I MP CB based on CJTC DO reporting is not supported.

3GPP TSG RAN WG1 #121												  R1-2503917
St Julian’s, Malta, May 19th – 23rd, 2025

Agenda item:	9.2.2
Source:	NEC
Title:              	Discussion on CSI enhancements
Document for:	Discussion and Decision

Conclusion
In this contribution, we provided our views on some remaining issues of CSI enhancements, and we propose:
Proposal 1: Regarding CBSR for Rel-19 Type-II codebook refinement, support proposal 1.B.1 (current editor CR for TS 38.214 reflecting agreements well). 
Observation: Regarding number of CPUs for typeII-Doppler with 48, 64, 128 ports, the interpretation of condition “while still not exceeding 8” for number of CPUs for capability 1 “OCPU is the legacy Rel-18 Type-II Doppler OCPU multiplied by ceil(P/32) and replace K with KDOPP for AP-CSI-RS, while still not exceeding 8” is not aligned for  and . 
Proposal 2: Uniformly apply the condition “while still not exceeding 8” (i.e. ) for  and , by updating the agreement as:
Proposal 3: UE behavior should be defined in case of reported DO value is ‘out of range’ (i.e. an infinite interval ). For example, the UE can do no pre-compensation or UE can do pre-compensation based on an exact value . 
Proposal 4: For CJT calibration reporting, support joint reporting of power information (e.g. RSRP) and CJT calibration reporting (at least for Delay offset). 

3GPP TSG RAN WG1 #121		R1-2504028
St Julian’s, Malta, May 19th – 23th, 2025

Agenda Item:	9.2.2
Source:	Google
Title:	CSI Enhancement for NR MIMO
Document for:	Discussion/Decision

Conclusion
In this contribution, we provided discussion on CSI enhancement for NR MIMO. Based on the discussion, the following proposals are provided.
Proposal 1: Endorse the following TP for 38.214
Reason for change: How to calculate the soft scaling when PD-NES is configured is unclear
Summary of change: Clarify the soft scaling is calculated based on the power offset configured for CSI-RS and the power offset for the CSI report sub-configuration for PD-NES
Consequence without the change: How to calculate the soft scaling when PD-NES is configured is unclear
------------------------------ start of TP for section 5.2.2.5.1 --------------------------
-	For a UE configured with 48, 64 and 128 antenna ports, obtained by aggregating  CSI-RS resources for channel measurement, and codebookType set to 'typeI-SinglePanel-r19', 'eTypeII-r19', 'typeII-FePortSelection-r19' or 'typeII-Doppler-r19', for CQI calculation, the UE should assume that PDSCH signals on antenna ports in the set , for  layers, would result in signals equivalent to corresponding symbols transmitted on antenna ports , with index , of the respective CSI-RS resource  with , corresponding to the port indices for CSI/PMI calculation,  in order of increasing port index for CSI/PMI calculation, according to the mapping described in Clause 7.4.1.5.3 of [4, TS 38.211], such that

	where  is the number of CSI-RS ports aggregated across the  CSI-RS resources,  is a vector of PDSCH symbols from the layer mapping defined in Clause 7.3.1.4 of [4, TS 38.211] and  is the precoding matrix corresponding to the reported PMI applicable to . If a UE is configured with codebookType set to 'typeI-SinglePanel-r19' and with the higher layer parameter typeI-softScalingRank1-2-r19, for , and , if supported by UE capability, the UE can assume that the PDSCH signal for each layer mapped to a vector of group  would have the same ratio of EPRE to CSI-RS EPRE for all  CSI-RS resources, equal to  times the powerControlOffset (in linear scale) of the respective CSI-RS resource and powerOffset (in linear scale) in the respective sub-configuration, if configured, where  and  are described in Clause 5.2.2.2.1a; otherwise, the UE can assume that the PDSCH signals for  layers would have the same ratio of EPRE to CSI-RS EPRE for all  CSI-RS resources, equal to the powerControlOffset of the respective CSI-RS resource.
------------------------------ start of TP for section 5.2.2.5.1 --------------------------

Proposal 2: Endorse the following TP for 38.214
Reason for change: UE should not receive the CSI-RS for PO report during cell DTX inactive period, since it is a CSI-RS for CSI acquisition
Summary of change: Clarify that UE does not receive the CSI-RS for PO report during cell DTX inactive period
Consequence without the change: UE will receive the CSI-RS for PO report during cell DTX inactive period by mistake
------------------------------ start of TP for section 5.1.6.1 --------------------------
During non-active periods of cell DTX if cell DTX is activated for a serving cell, the UE is not expected to receive the periodic CSI-RS and semi-persistent CSI-RS on the serving cell configured in CSI report configuration in CSI-ReportConfig associated with the higher layer parameter reportQuantity comprising at least 'RI' or ‘cjtc-P’. If the cell DTX is activated for a serving cell [10, TS 38.321], the most recent CSI measurement occasion of semi-persistent CSI-RS resource or periodic CSI-RS resource on the serving cell occurs in active periods of cell DTX for CSI report configured by CSI-ReportConfig associated with the higher layer parameter reportQuantity comprising at least 'RI' or ‘cjtc-P’.
------------------------------ start of TP for section 5.1.6.1 --------------------------


Proposal 3: Endorse the following TP for 38.215
Reason for change: The UE behavior for DO/FO/PO measurement is unclear
Summary of change: Clarify the UE behavior for DO/FO/PO measurement based on similar approach as TDCP measurement (removing bracket only)
Consequence without the change: The UE behavior for DO/FO/PO measurement is unclear
------------------------------ start of TP for 38.215 --------------------------
5.1.50	Coherent joint transmission calibration delay offset


5.1.51	Coherent joint transmission calibration frequency offset


5.1.52	Coherent joint transmission calibration phase offset


------------------------------ end of TP for 38.215 --------------------------

Proposal 4: Clarify that the joint operation for Rel-19 CRI-based CSI refinement and Rel-18 cell DTX is supported

3GPP TSG RAN WG1 #121	        	R1-2504062
St Julian’s, Malta, May 19th – 23rd, 2025

Agenda Item:					    9.2.2
Source:	Sony
Title:	Discussion of CSI enhancements
Document for:	Discussion and decision

Conclusions
We made the following observations and proposals:
 For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, the UE may advantageously perform DO compensation on the Rel-18 type II CJT CSI associated with TRP(s) that are either ‘out of range’ by applying a DO value of , i.e., the maximum dynamic range. 
 For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, when linking CJTC Dd and Rel-18 eType-II CJT CSI reports is configured with a joint trigger, the UE performs DO compensation on the Rel-18 type II CJT CSI associated with TRP(s) that are ‘out of range’ by applying a DO value of , i.e., the maximum dynamic range.
 For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, when linking CJTC Dd and Rel-18 eType-II CJT CSI reports is configured with two separate triggers, when at least one of the N_TRP reported delay offset (DO) values in a linked CJTC Dd report is ‘out of range,’ the UE performs DO compensation on the triggered Rel-18 eType-II CJT CSI associated with TRP(s) that are ‘out of range’ by applying a DO value of , i.e., the maximum dynamic range.

3GPP TSG RAN WG1 Meeting #121		R1- 2504077
St Julian’s, Malta, May 19th – 23rd, 2025

Agenda item:       9.2.2
Source: 	Nokia
Title: 	CSI enhancement for NR MIMO Phase 5
Document for:     Discussion and Decision
1	

Conclusion
Hereafter is a summary of observations and proposals for Type-I extension for up to 128 ports

Observation 1	For the Rel-19 Type-II codebook refinement based on Rel-18 Type-II Doppler for 48, 64, and 128 CSI-RS ports, for capability 1, there are no values of  that a UE can indicate such that , for .
Observation 2	For Rel-19 Type-II-Doppler configured with  aperiodic CSI-RS resource groups, the  CSI-RS resource groups are transmitted following the order of the CSI-RS resource groups configured in the CSI-RS resource set. Hence, the CMRs in the first resource group configured without additionalOneSlotOffsetDopp can be used as reference for the aperiodic triggering offset of the associated CSI-IM resource.

Proposal 1	For the Rel-19 Type-II codebook refinement based on Rel-18 Type-II Doppler for 48, 64, and 128 CSI-RS ports, for capability 1, either conclude, based on the agreed formula for , that  is not needed because  for all values of , or adopt the same  formula as in capability 2 (i.e., CPU occupation is the same for capability 1 and 2).
Proposal 2	For Rel-19 Type-II-Doppler codebook refinement for 48, 64 and 128 ports configured with  aperiodic NZP CSI-RS resource groups for channel measurements, the triggering offset of the aperiodic CSI-IM follows the associated NZP CSI-RS resource(s) in the first resource group configured without additionalOneSlotOffsetDopp.

3GPP TSG RAN WG1 Meeting #121	R1-2504085
St Julian’s, Malta, May 19th – 23rd, 2025

Source:	Fujitsu
Title:	Remaining issues on Rel-19 CSI enhancements
Agenda item:	9.2.2
Document for:	Discussion and Decision

Conclusions
In conclusion, we have the following proposals on Rel-19 CSI enhancements.
For Rel-19 Type II Doppler codebook on 48, 64, 128 ports, further clarification is needed as below.
Only one AP CSI-IM or AP NZP CSI-RS for IM can be configured in one resource set, where one IMR is associated with all KDOPP*K CMRs.
For Rel-19 Type II Doppler codebook on 48, 64, 128 ports, the triggering offset of AP CSI-IM and AP NZP CSI-RS for IM can also follow the associated CMR(s) in the first slot.
In Rel-19, regarding the linkage between CJTC Dd and Rel-18 eType-II CJT CSI report, the fixed correspondence rule should be clearly defined, e.g., defined as a one-to-one mapping between TRS sets and CSI-RSs.

3GPP TSG-RAN WG1 Meeting #121                                                                        R1-2504096
St Julian’s, Malta, May 19th – 23rd, 2025

Agenda Item:	9.2.2
Source:	HONOR
Title:	Discussion on CSI enhancements
Document for:	Discussion and Decision

Conclusions
In this paper, some preliminary views on CSI enhancements are discussed. The following proposals are made:
Proposal 1: For Type-II Doppler codebook refinement for 48, 64, and 128 CSI-RS ports, the triggering offset of aperiodic CSI-IM follows the triggering offset of the CSI-RS resource in the first slot of the first CSI-RS resource group in the CMR for channel measurement.
Proposal 2: For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, when linking CJTC Dd and Rel-18 eType-II CJT CSI reports, and if the UE performs delay offset (DO) compensation based on the latest linked CJTC Dd report when calculating the Rel-18 Type-II CJT CSI, the UE is not expected to be configured with restrictedCMR-Selection for Rel-18 eType-II CJT CSI report.
Proposal 3: For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, if UE performs PMI calculation for the Rel-18 eType-II CJT CSI report assuming pre-compensation using the UE-reported delay offset in a joint trigger, when at least one of the reported delay offset (DO) values in a linked CJTC Dd report is ‘out of range’, the UE does not perform DO compensation on the triggered Rel-18 eType-II CJT CSI associated with TRP(s) that are ‘out of range’.
Proposal 4: When jointly triggered, the time interval between reception time of CMR/IMR and the PUSCH to carry the CSI report should be larger than Z', where CMR/IMR should include all the CSI-RS/CSI-IM associated with the two configured CSI-ReportConfigs.

3GPP TSG-RAN WG1 #121                                        R1-2504134
Malta, May 19th–23th, 2025
Agenda Item:	9.2.2
Source: 	ETRI
Title:	Discussion on CSI enhancements for NR MIMO Phase 5
Document for:	Discussion/Decision

Conclusion
In this contribution, we have discussed CSI enhancements for NR MIMO Phase 5.
Our observations are captured below: 
Observation 1: For PO subband reporting, always configuring PO reporting for NSB-P subbands starting from the first subband can introduce unnecessary RRC signaling overhead, particularly in scenarios with large BWPs and small subband sizes.
We propose the followings: 
Proposal 1: For the Rel-19 Type-I and Type-II codebook refinement for up to 128 CSI-RS ports, regarding aperiodic CMR for the CSI reporting configured with Rel-19 Type-II Doppler, we propose that the working group confirm whether all KDOPP CSI-RS resource groups in a same NZP CSI-RS resource set share the same qcl-Info, pcOffset, and pcOffsetSS.
Proposal 2: For the Rel-19 Type-I and Type-II codebook refinement for up to 128 CSI-RS ports, when configured with Rel-19 Type-II Doppler codebook, the aperiodic triggering offset of CSI-IM follows the triggering offset of the NZP CSI-RS resource(s) in the first slot within the first NZP CSI-RS resource group of the associated aperiodic resource set for channel measurement.
Proposal 3: For both the Rel-19 CRI-based CSI refinement for up to 128 CSI-RS ports and the Rel-19 Type-I and Type-II codebook refinement for up to 128 CSI-RS ports, consider replacing the phrase “relative to the resource-set-level slot offset, using the same design as Rel-19 Type-I/II codebook refinement for 48, 64, and 128 ports,” specified in the field description of additionalSlotOffset-r19, with “relative to the slot offset configured by aperiodicTriggeringOffset in NZP-CSI-RS-ResourceSet.”
Proposal 4: For both the Rel-19 CRI-based CSI refinement for up to 128 CSI-RS ports and the Rel-19 Type-I and Type-II codebook refinement for up to 128 CSI-RS ports, we suggest modifying the field description of aperiodicTriggeringOffset as follows. After the existing phrase: “Offset X between the slot containing the DCI that triggers a set of aperiodic NZP CSI-RS resources and the slot in which the CSI-RS resource set is transmitted.” add the following clarification: “Otherwise, Offset X between the slot containing the DCI that triggers a set of aperiodic NZP CSI-RS resources and the earliest slot in which the CSI-RS resource set can be transmitted, where the associated one of additionalOneSlotOffset, additionalOneSlotOffsetDopp, or additionalSlotOffset-r19, if applicable, represents the additional slot offset relative to Offset X.”
Proposal 5: For both the Rel-19 CRI-based CSI refinement for up to 128 CSI-RS ports and the Rel-19 Type-I and Type-II codebook refinement for up to 128 CSI-RS ports, regarding the legacy equations specifying the slot in which the aperiodic CSI-RS is transmitted, consider explicitly capturing the addition of a resource-level slot offset.
Proposal 6: For the Rel-19 CRI-based CSI refinement for up to 128 CSI-RS ports, regarding the aperiodic triggering offset of CSI-IM in the CSI-IM resource set, consider one of the following alternatives: 
Alt. 1: For each CSI-IM resource, an RRC-configured resource-level slot offset (relative to the resource-set-level slot offset configured for the associated NZP CSI-RS for channel measurement) is supported with values {0, 1, 2, 3, 4, 5, 6, 7}.
Alt. 2: For each CSI-IM resource, an RRC-configured resource-level slot offset (relative to the resource-set-level slot offset configured for the associated NZP CSI-RS for channel measurement) is supported with values {0, 1, 2, 3, 4, 5, 6, 7} under the restriction that the resource-level slot offset is no greater than that of the associated NZP CSI-RS for channel measurement.
Alt. 3: For each CSI-IM resource, the same resource-level slot offset (relative to the resource-set-level slot offset configured for the associated NZP CSI-RS for channel measurement) as that of the associated NZP CSI-RS for channel measurement is applied.
Proposal 8: For PO subband reporting, a UE is not expected to be configured with numberofSubbandsPO which contains a subband where any of the NTRP CSI-RS resources linked to the CSI Report setting has the frequency density of a CSI-RS port per PRB in the subband less than the configured density of the CSI-RS resource.
Proposal 9: For PO subband reporting, a UE is not expected to be configured with subbandSize set to 1 PRB when any of the NTRP NZP CSI-RS resources linked to the CSI Report setting has a configured frequency density of 0.5 RE/port/PRB.
Proposal 10: For PO subband reporting, introduce a starting subband index as a higher layer parameter in the CSI Report setting.

3GPP TSG RAN WG1 #121		        R1-2504229
St Julian’s, Malta, May 19th – 23rd, 2025

Source:	OPPO
Title:	CSI enhancements for Rel-19 MIMO
Agenda Item:	9.2.2
Document for:	Discussion and Decision

Conclusion
In this contribution, we discuss potential enhancements for Rel-19 MIMO enhancement with the following proposals.
Proposal 1: For Rel-19 Type-II Doppler codebook, when K*KDOPP CMRs are configured, the triggering offset of the associated aperiodic CSI-IM follows the CMR in the first slot (i.e. the first CMR among the K*KDOPP CMRs).
Proposal 2: For the Rel-19 Type-II codebook refinement for 48, 64, and 128 CSI-RS ports, on CBSR, clarify the current two agreements with Proposal 1.B.1.

3GPP TSG RAN WG1 #121 	R1-2504389
St Julian’s, Malta, May 19 – 23, 2025

Agenda item:	9.2.2
Source: 	Qualcomm Incorporated
Title: 	Maintenance on CSI for >32 ports and UE-assisted CJT
Document for:	Discussion/Decision

Conclusion
In this contribution, we discuss remaining issues of Rel-19 CSI. 
Based on the analyses, we propose:
Proposal 1: For Rel-19 Type-II-Doppler CSI with KDopp={4, 8, 12} CSI-RS resource groups of K={2, 3, 4} aperiodic CSI-RS resources each, the aperiodic triggering offset of CSI-IM resource follows the offset of the first resource group without additionalOneSlotOffsetDopp.
Proposal 2: For Rel-19 UE-assisted CJT, for PO report, when AP-SRS is configured linked to NTRP AP-CSI-RSs, also support occasion-level linkage between the latest SRS occasion before the NTRP CSI-RS occasions, for determining the reference UE antenna port.
Proposal 3: For Rel-19 UE-assisted CJT, for PO report with P/SP-CSI-RS, the NTRP CSI-RS resources are located within one slot.
Proposal 4: For Rel-19 UE-assisted CJT, for PO report, after the CSI report (re)configuration, serving cell activation, BWP change, UE reports an “invalid” codepoint if no available SRS occasion of the linked SRS resource is transmitted before the NTRP CSI-RS occasions no later than the CSI reference resource.

3GPP TSG RAN WG1 #121	R1-2504445
St Julian’s, Malta, May 19th – 23th, 2025
Source:	Sharp
Title:	CSI enhancements
Agenda Item:	9.2.2
Document for:	Discussion and Decision

Conclusion
In this contribution, we have the following proposal:
Proposal 1: When linking CJTC and CJT PMI reports is configured, the lower limit value  of the reported DO  should be used for the DO compensation.
Proposal 2: When linking CJTC and CJT PMI reports is configured, and the reported DO value is compensated, the UE should assume the following PDSCH signal to calculate CQI [3]:

3GPP TSG-RAN WG1 Meeting #121	R1-2504451 
St Julian’s, Malta, May 19th – 23rd, 2025

Agenda Item:	9.2.2
Source:	Ericsson
Title:	Remaining issues on CSI enhancements for large antenna arrays and CJT 
Document for:	Discussion, Decision

1	

Conclusion 

Proposal 1:  For the Rel-19 Type-I SP codebook refinement for 48, 64, and 128 CSI-RS ports, extend the agreed Scheme-A and Scheme-B to 16, 24, and 32 CSI-RS ports, for all applicable RI values with K=1 only.

Proposal 2:  For the Rel-19 Type-I SP codebook refinement for 48, 64, and 128 CSI-RS ports, regarding per-layer scaling factor applied to each of the selected SD basis vectors for the 3-bit scaling factor(s), a new RRC parameter to enable the application of the scaling factor for RI=v=2 is not introduced.
4. 

3GPP TSG RAN WG1 #121			R1-2504496
St Julian’s, Malta, May 19th – 23th, 2025

Source:	NTT DOCOMO, INC.
Title:	Discussion on CSI enhancements
Agenda Item:	9.2.2
Document for: 	Discussion and Decision

Conclusion
In this contribution, we discussed remaining issues for CSI enhancements for up to 128 ports and we made following proposals.
Proposal 2-1
When port-subsetIndicator (Rel-18 SD NES Type-1) is configured for 48, 64, and 128 CSI-RS ports for Rel-19 Type-I SP codebook, the following case should be supported: the actual indicated port number (with value of 1 in bitmap of port-subsetIndicator) is configured to be <= 32 ports without separate UE capability. 
In this case, the applied codebook type should be clarified. 
Clarify whether the codebook type of Rel-19 SP codebook is applied to the case of <= 32 ports based on the latest specification of TS 38.214.
In this case, new mapping of i1,3 to (k1,k2) could be considered, e.g., legacy mapping of i1,3 to (k1,k2) for <= 32 ports can be reused for the actual antenna configuration after port subset indication.
Proposal 2-2
Regarding the extension of Rel-19 Type-I SP codebook to legacy port number, support FL Proposal except the FFS.
Proposal 2-3
Regarding CBSR for Rel-19 Type-II codebook refinement, two-level CBSR configuration design is maintained, and -bit group-based CBSR is for second-level indication of B2 only.
Proposal 2-4
For the Rel-19 Type-II Doppler CSI refinement for 48, 64, and 128 CSI-RS ports, when the K>1 aggregated NZP aperiodic CSI-RS resources per CSI-RS resource group for CMR are within two consecutive slots, the triggering offset of the associated aperiodic CSI-IM follows the associated NZP CSI-RS resource(s) of first NZP CSI-RS resource group for CMR in the first slot.

3GPP TSG RAN WG1 #121	R1-2504549
St Julian’s, Malta, May 19th – 23rd, 2025

Agenda Item:	9.2.2
Source:	KDDI
Title:	Discussion on CSI enhancements for NR MIMO Phase 5
Document for:	Discussion and decision

Conclusion
In this contribution, we discussed remaining issues that should be considered in this work regarding UE reporting enhancement for CJT deployments under non-ideal synchronization and backhaul. Based on the discussion above, we made the following proposals.
Proposal 1: For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, even when linking CJTC Dd and Rel-18 eType-II CJT CSI reports, the UE can be configured with restrictedCMR-Selection for Rel-18 eType-II CJT CSI reports.
Proposal 2: For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, when linking CJTC Dd and Rel-18 eType-II CJT CSI reports is configured with a joint trigger, the UE does not perform DO compensation on the Rel-18 eType II CJT CSI associated with TRP(s) that are ‘out of range’.
Proposal 3: For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, when linking CJTC Dd and Rel-18 eType-II CJT CSI reports is configured with two separate triggers, when at least one of the NTRP reported delay offset (DO) values in a linked CJTC Dd report is ‘out of range’, the UE does not perform DO compensation on the triggered Rel-18 eType-II CJT CSI associated with TRP(s) that are ‘out of range’
Proposal 4: For the Rel-19 aperiodic standalone CJT calibration (CJTC) reporting, configuring a UE (via RRC signaling) to perform PMI calculation for the Rel-18 eType-II CJT CSI report assuming pre-compensation using the UE-reported frequency offset (when ReportQuantity is ‘cjtc-F’) is not needed.

3GPP TSG RAN WG1 #121							R1-2504728
St Julian, Malta, May 19th – 23rd, 2025

Agenda item:	9.2.2
Source: 	Moderator (Samsung)
Title: 	Moderator Summary#2 on Rel-19 CSI enhancements: Round 2
Document for:	Discussion and Decision

Summary: issue 2

Table 2B SLS results: issue 2 
--
Table 2C Additional inputs: issue 2

Issue 3 (WID objective 3): CJT calibration reporting for non-ideal synchronization and backhaul
--

3GPP TSG RAN WG1 #121							R1-2504729
St Julian, Malta, May 19th – 23rd, 2025

Agenda item:	9.2.2
Source: 	Moderator (Samsung)
Title: 	Moderator Summary for Monday Offline Session on Rel-19 CSI enhancements
Document for:	Discussion and Decision

Summary of proposals 

Issue 1 (WID objective 2a and 2b): Type-I and Type-II codebook refinement for up to 128 CSI-RS ports


Arguments from opponents: Unlike CSI-IM, NZP CSI-RS for IM includes its own triggering offset. So the NW configure this offset to align with the associated CMR in the first slot. 




Issue 2 (WID objective 2c): CRI-based CSI for hybrid beamforming (HBF)


Arguments from opponents: This can be achieved based on the current priority rules + NW implementation


Issue 3 (WID objective 3): CJT calibration reporting for non-ideal synchronization and backhaul

--

3GPP TSG RAN WG1 #121							R1-2504730
St Julian, Malta, May 19th – 23rd, 2025

Agenda item:	9.2.2
Source: 	Moderator (Samsung)
Title: 	Moderator Summary for Wednesday Offline Session on Rel-19 CSI enhancements
Document for:	Discussion and Decision

Summary of proposals 

Issue 1 (WID objective 2a and 2b): Type-I and Type-II codebook refinement for up to 128 CSI-RS ports





Discussion




Issue 2 (WID objective 2c): CRI-based CSI for hybrid beamforming (HBF)

--

Issue 3 (WID objective 3): CJT calibration reporting for non-ideal synchronization and backhaul

--