| R1-2503590 Views on Rel-19 TEI.docx |
3GPP TSG RAN WG1 #121 R1-2503590
St Julian’s, Malta, May 19th – 23th, 2025
Agenda item: 9.14
Source: Samsung
Title: Views on Rel-19 TEI
Document for: Discussion and Decision
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Conclusion
In this contribution, the following proposal is given:
Proposal 1. For TEI proposal on Scheduling request (SR) transmission occasion switching upon TCI update, it would be better to consider the following aspects.
Considering multiple SR configurations
Considering symbol level time domain offset
Considering additional MAC-CE delay
Proposal 2. For TEI proposal on Counting of the same active CSI-RS resources, don’t support to introduce a new UE capability supporting new active CSI-RS resource/port counting rule associated with NES CSI.
Proposal 3. For TEI proposal on Counting of the same active CSI-RS resources, if a new UE capability for NES CSI can be agreed, it would be better to clarify how to count the CSI-RS resource/port if a certain CSI-RS resource is referred by N CSI report setting without sub-configuration and referred by M CSI report setting with sub-configuration.
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| R1-2503675 On Rel-19 TEI proposals_final.docx |
3GPP TSG RAN WG1 #121 R1-2503675
St Julian’s, Malta, May 19th – 23rd, 2025
Source: ZTE Corporation, Sanechips
Title: On Rel-19 TEI proposals
Agenda Item: 9.14
Document for: Discussion/Decision
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Conclusion
In this contribution, we summarize the observation(s) and proposal(s) for Rel-19 TEI on SR occasion switching upon TCI update, and the Recommended RRC parameter list and TP for approved Rel-19 TEIs.
Rel-19 TEI on SR occasion switching upon TCI update
Observation 1: On analog/hybrid beam-forming architecture, for the same set of OFDM symbols, there are numerous SR transmission occasions from different UEs that being aligned with the same gNB Rx beam.
The above can be observed for the realistic NW implementation in both FR1 (U6GHz) and FR2.
Observation 2: On an SR transmission comprising a list of UEs, once that the beam direction (i.e., NW UL Rx beam) of one SR resource is changed, the NW UL RX beam applied to the UE are not aligned anymore, while considering, as in legacy, the transmission occasion for the SR can NOT be updated simultaneously.
Proposal 1: On UL-spatial relation and unified TCI framework, support that one PUCCH-SpatialRelationInfo and joint/UL TCI state can be associated with a time-domain offset (in slot level), respectively.
If a PUCCH-SpatialRelationInfo or joint/UL TCI state associated with a time-domain offset is applied to a PUCCH resource used for an SR transmission, then the for determining SR transmission occasion in the PUCCH resource as described in TS 38.213 Clause 9.2.4 (i.e., ) is provided by the associated time-domain offset.
For UL-spatial relation framework, introduce a new RRC parameter of the time-domain offset in PUCCH -SpatialRelationInfo.
For unified TCI framework, introduce a new RRC parameter of the time-domain offset in a joint/UL TCI state.
For unified TCI framework, introduce a new UE capability signaling for the minimum beam application time for DCI-based TCI state update, and beamAppTime is configured based on the new UE capability signaling if any joint/UL TCI state is associated with a time-domain offset
Introduce UE capability signaling on above features
Above is applied to the case of Rel-15 spatial-relation and Rel-17 unified TCI framework.
Note: There is NO RAN2 MAC impact from above feature.
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| R1-2503767.docx |
3GPP TSG RAN WG1 #121 R1-2503767
St Julian’s, Malta, May 19th – 23rd, 2025
Source: CATT, MediaTek Inc.
Title: Rel-19 TEI on SRS antenna switching pattern report
Agenda Item: 9.14
Document for: Discussion and Decision
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Conclusion
In this contribution, we have discussed the motivation and the spec impacts of SRS antenna switching pattern reporting. We summarize the observation and proposals for enhancement of SRS antenna switching pattern reporting as follows:
Observation 1: Allowing UE reports preferred SRS antenna switching pattern is beneficial for UE to turn off some antennas due to overheating or power saving, and is also beneficial to save SRS resources and improve UL transmission efficiency.
Proposal 1: Support UE reports its preferred SRS antenna switching pattern to NW via UAI.
Subject to UE capability, the duration/periodicity of the preferred pattern is also reported.
Proposal 2: Send an LS to RAN2 for introducing the SRS antenna switching pattern reporting in UAI.
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| R1-2504276.docx |
3GPP TSG RAN WG1 #121 R1-2504276
St. Julians, Malta, 19th – 23rd May, 2025
Agenda item: 9.14
Source: MediaTek Inc., Nokia, Apple, Ericsson, NTT DOCOMO, Orange
Title: Proposal for TEI19
Document for: Discussion and Decision
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Conclusion
The following proposals are made:
Proposal 1: For simultaneous CSI-RS reception in Network Energy saving UE features 42-1/1a/1b/1c, and 42-2/2a/2b/2c, define the following new UE capability:
Simultaneous NZP-CSI-RS resource counting NES: To allow the UE to indicate that CSI-RS ports within one periodic/semi-persistent CSI-RS resource, as well as the periodic/semi-persistent CSI-RS resource, are counted as one resource even if the periodic/semi-persistent CSI-RS resource is referred multiple times.
Proposal 2: Agree on the proposed draft TP to TS38.214 for the new NES UE capability.
Proposal 3: Consider the UE Feature description in this basis for the specification update.
4 |
| R1-2504290.docx |
3GPP TSG-RAN WG1 Meeting #121 R1-2504290
St Julian’s, Malta, 19 – 23 May, 2025
Agenda Item: 9.14
Source: Huawei, HiSilicon
Title: On muting cell acquisition signals in MBMS-dedicated cell
Document for: Discussion and Decision
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Conclusions
This paper discusses how the parameters agreed for the TEI should be configured, which leads to following proposals:
Proposal 1: Values of the parameters n and k are configured in SIB1-MBMS.
Proposal 2: The parameters n and k to be configured should be new parameters and should be configured per cell.
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| R1-2504351 On Rel-19 RAN1 TEI.docx |
3GPP TSG RAN WG1 #121 R1- 2504351
St Julian’s, Malta, May 19th – 23th, 2025
Agenda Item: 9.14
Source: Apple Inc.
Title: On Rel-19 RAN1 TEI
Document for: Discussion/Decision
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Conclusion): For TEI [SRSCS_ULTxSwitch], no new RRC parameters are introduced.
TP for TEI [SRSCS_ULTxSwitch]
As part of CR discussions after RAN1#120b [1], it was identified that the endorsed TEI must be captured in 38.214, Sec. 6.1.6 and 6.2.1.3. The following TP is proposed based on those discussion. Here, it is noted that the last bullet in the endorsed TEI, covers 2 cases, as follows
In Case 1, before end of SRS-CS transmission on target CC, UE is indicated about uplink transmission on CC1. In this case, UE switches the Tx chains from target CC to CC1, based on the endorsed TEI
In Case 2: such indication is not given to the UE before the end of SRS-CS transmission on target. In this case, UE returns the Tx chains from target CC to the source CC, based on the endorsed TEI.
6.1.6 Uplink switching
The UE may omit uplink transmission during the uplink switching gap if the conditions defined in this clause are met and the UE is configured with uplinkTxSwitching or uplinkTxSwitchingMoreBands. The switching gap is indicated by UE capability uplinkTxSwitchingPeriod2T2T if uplinkTxSwitching-2T-Mode is configured, and uplinkTxSwitchingPeriod otherwise in clauses 6.1.6.1, 6.1.6.2.0, 6.1.6.3, and is determined based on higher layer parameter switchingPeriodConfigForBandPair in clause 6.1.6.2.2 for uplink switching configured with 2, 3 or 4 uplink bands if uplinkTxSwitchingMoreBands is configured:
- If a UE indicated a capability for uplink switching with BandCombination-UplinkTxSwitch for a band combination, and if it is for that band combination
- Configured with a MCG using E-UTRA radio access and with a SCG using NR radio access (EN-DC), or
- Configured with uplink carrier aggregation, or
- Configured in a serving cell with two uplink carriers with higher layer parameter supplementaryUplink.
The conditions under which the switching gap may be present are defined for each of the cases in clauses 6.1.6.1, 6.1.6.2, and 6.1.6.3 respectively.
If an uplink switching is triggered for an uplink transmission starting at T0, after T0-Toffset, the UE is not expected to cancel the uplink switching, or to trigger any other new uplink switching occurring before T0 for any other uplink transmission that is scheduled after T0-Toffset, where Toffset is the UE processing procedure time defined for the uplink transmission(s) triggering the switch given in clause 5.3, clause 5.4, clause 6.1, clause 6.2.1, clause 6.4 and in clause 9 of [6, TS 38.213].
The UE does not expect to perform more than one uplink switching in a slot with µUL = max(µUL, 1, µUL, 2), where the µUL, 1 corresponds to the subcarrier spacing of the active UL BWP of one uplink carrier before the switching gap and the µUL, 2 corresponds to the subcarrier spacing of the active UL BWP of the other uplink carrier after the switching gap.
For uplink switching configured with 3 or 4 uplink bands
- If two contiguous intra-band uplink carriers are configured to a UE, the UE may assume that the active UL BWPs of the two carriers are configured with the same subcarrier spacing.
- The UE does not expect to perform more than one uplink switching in a reference slot with µUL, where the µUL corresponds to the maximum subcarrier spacing of the active UL BWPs of all the configured uplink carriers.
- If 500 µs is determined by the UE capability uplinkTxSwitchingMinimumSeparationTime, when within any two consecutive reference slots corresponding to numerology µUL,
- the UE first performs one uplink switch and later performs another uplink switch and
- at least three bands are involved in the transmissions before the first switch, between the first switch and the second switch, and after the second switch,
the separation time between the start of all transmission(s) after the first switch and the start of all transmission(s) after the second switch is not expected to be less than 500 µs. If other than 500 µs is determined by the UE capability uplinkTxSwitchingMinimumSeparationTime, no additional restrictions apply.
- If an uplink switching is triggered for uplink transmission(s) with a gap between the start of the first uplink transmission(s) and the end of the last preceding uplink transmission(s) that is smaller than the determined switching gap , the UE determines the band of the switching period location, defined in [8, TS 38.101-1] based on the priority of the bands configured by uplinkTxSwitchingBandList. Among the bands either in switch-from or switch-to bands but not both, the switch is located on either,
- the switch-from band(s) if the highest priority band is a switch-to band, or
- the switch-to band(s) if the highest priority band is a switch-from band.
If an uplink carrier is configured as a switch-from carrier for a UE with higher layer parameter srs-SwitchFromServCellIndex and srs-SwitchFromCarrier as defined in clause 6.2.1.3 and the uplink carrier is also configured with uplinkTxSwitching or uplinkTxSwitchingMoreBands, then
- if an uplink switching is triggered by an uplink transmission on a band other than the band where the switch-from carrier is configured and the preceding uplink transmission is an SRS transmission as defined in clause 6.2.1.3,
- if the uplink transmission is not associated with a DCI, or it is based on a DCI ending at least symbols before the end of the SRS transmission, then the uplink switching gap in this clause is determined as if the UE indicates [SRSCS_ULTxSwitch] set to ‘sum’ for the band combination and otherwise,
- Otherwise, if the uplink transmission is based on a DCI where symbols after the end of DCI is after the end of the SRS transmission plus , the uplink switching gap in this clause is determined as
- Otherwise, the uplink switching gap in this clause is determined as
- where is the switching gap determined in this clause assuming that one uplink channel or signal were transmitted on the switch-from carrier and would trigger an UL Tx switch.
- the UE does not expect to perform both uplink switching and the switching defined in clause 6.2.1.3 in a reference slot with µUL, where the µUL corresponds to the maximum subcarrier spacing of the active UL BWPs of all the configured uplink carriers.
6.2.1.3 UE sounding procedure between component carriers
For a carrier of a serving cell c1 with slot formats comprised of DL and UL symbols, not configured for PUSCH/PUCCH transmission, denote as the corresponding carrier of a serving cell whose UL transmissions are temporarily suspended as signalled by higher layer parameter srs-SwitchFromServCellIndex and srs-SwitchFromCarrier. Define the set as the set of carriers of serving cells that each carrier meets one of the following conditions:
- is in the same band and same TAG as ;
- is a carrier of inter-band CA with and is indicated through the capability signalling srs-SwitchingAffectedBandsListNR-r17 to be affected by the SRS switch from to ;
where .
A UE can be configured with SRS resource(s) on a carrier c1 with slot formats comprised of DL and UL symbols and not configured for PUSCH/PUCCH transmission. For carrier c1, the UE is configured with higher layer parameter srs-SwitchFromServCellIndex and srs-SwitchFromCarrier the switching from carrier c2 which is configured for PUSCH/PUCCH transmission. During SRS transmission on carrier c1 (including any interruption due to uplink or downlink RF retuning time [11, TS 38.133] as defined by higher layer parameters switchingTimeUL and switchingTimeDL of SRS-SwitchingTimeNR or as defined by below), the UE temporarily suspends the uplink transmission on carriers in the set S(c2).
For an SRS transmission starting in symbol of carrier and a conflicting transmission in any carrier starting in symbol, the UE shall apply the prioritization / dropping rules in the remainder of this clause taking into account:
- DCI(s) for which the time interval between the last symbol of PDCCH and is at leastsymbols and an additional time duration , and the time interval between the last symbol of PDCCH and is at least symbols; and
- semi-persistent CSI reports or SRS considered active at least symbols and an additional time duration before , and considered active at least symbols before .
where
- if the switch-from carrier is not configured with Uplink switching as defined in clause 6.1.6,
,
- if the switch-from carrier is configured with Uplink switching as defined in clause 6.1.6
- if the UE indicates [SRSCS_ULTxSwitch] set to ‘max’ for the band combination, ,
- if the UE indicates [SRSCS_ULTxSwitch] set to ‘sum’ for the band combination, , ,
where is determined in clause 6.1.6 assuming that one uplink channel or signal were transmitted on the switch-from carrier and would trigger an UL Tx switch. , if no uplink switching were triggered.
and the time interval unit of OFDM symbol is counted based on the smaller subcarrier spacing across any carrier within the set , and their corresponding scheduling cells.
The following prioritization rules shall be applied in case of collision between a transmission of SRS over carrier and transmission of a physical signal/channel over a carrier of a serving cell in set
- the UE shall not transmit SRS whenever SRS transmission (including any interruption due to uplink or downlink RF retuning time [11, TS 38.133] as defined by higher layer parameters switchingTimeUL and switchingTimeDL of SRS-SwitchingTimeNR) on the carrier of the serving cell and PUSCH/PUCCH transmission carrying HARQ-ACK/positive SR/RI/CRI/SSBRI and/or PRACH on a carrier of a serving cell in set happen to overlap in the same symbol
- the UE shall not transmit a periodic/semi-persistent SRS whenever periodic/semi-persistent SRS transmission (including any interruption due to uplink or downlink RF retuning time [11, TS 38.133] as defined by higher layer parameters switchingTimeUL and switchingTimeDL of SRS-SwitchingTimeNR) on the carrier of the serving cell and PUSCH transmission carrying aperiodic CSI on a carrier of a serving cell in set happen to overlap in the same symbol
- the UE shall drop PUCCH/PUSCH transmission carrying periodic/semi-persistent CSI comprising only CQI/PMI/L1-RSRP/L1-SINR, and/or SRS transmission on a carrier of a serving cell in set configured for PUSCH/PUCCH transmission whenever the transmission and SRS transmission (including any interruption due to uplink or downlink RF retuning time [11, TS 38.133] as defined by higher layer parameters switchingTimeUL and switchingTimeDL of SRS-SwitchingTimeNR) on the carrier of the serving cell happen to overlap in the same symbol
- the UE shall drop PUSCH transmission carrying aperiodic CSI comprising only CQI/PMI/L1-RSRP/L1-SINR on a carrier of a serving cell in set whenever the transmission and aperiodic SRS transmission (including any interruption due to uplink or downlink RF retuning time [11, TS 38.133]) as defined by higher layer parameters switchingTimeUL and switchingTimeDL of SRS-SwitchingTimeNR) on the carrier of the serving cell happen to overlap in the same symbol.
Proposal 2: Adopt the above TP to Rel-19 38.214.
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| R1-2504418 Rel-19 RAN1 TEI proposal.docx |
3GPP TSG RAN WG1 #121 R1-2504418
St Julian’s, Malta, May 19th – 23th, 2025
Agenda item: 9.14
Source: Qualcomm Incorporated, ZTE Corporation, Verizon
Title: Rel-19 RAN1 TEI proposal
Document for: Discussion/Decision
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Conclusions
The following proposal is proposed to address the issue of no gap between back-to-back PUCCH/PUSCH and SRS transmissions.
Proposal 1:
Except for the following special case, at least Y symbol gap is expected between a PUCCH/PUSCH transmission resource and a xTyR (where x |
| R1-2504442 On TEI-19.docx |
3GPP TSG RAN WG1 #121 R1-2504442
St Julian’s, Malta, May 16th – 23rd, 2025
Agenda Item: 9.14
Source: Ericsson
Title: On TEI-19
Document for: Discussion
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Summary #2 on Rel-19 TEIs,” Moderator (NTT DOCOMO, INC.), RAN1#120bis, April 2025.
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| R1-2504521.docx |
3GPP TSG-RAN WG1 Meeting #121. R1-2504521
St Julian’s, Malta, May 19th – 23th, 2025
Agenda item: 9.14
Source: Moderator (NTT DOCOMO, INC.)
Title: FL Summary #1 on Rel-19 TEIs
Document for: Discussion and Decision
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Conclusion
To be updated
Agreements in Rel-19 TEI
RAN1#120bis
Agreement
For simultaneous CSI-RS reception in UE features 2-33, 2-36, 2-40, 2-41, 2-43, 16-3a and 16-3b, define 1 new UE capability:
UE capability 1: To allow the UE to indicate that CSI-RS ports within one periodic/semi-persistent CSI-RS resource, as well as the periodic/semi-persistent CSI-RS resource, are counted as one resource, even if the periodic/semi-persistent CSI-RS resource is referred by N Report Settings.
Agreement
The non-MBSFN subframes containing the cell acquisition signals (PSS/SSS/PBCH/SIB1) in an MBMS-dedicated cell shall only be transmitted within the first (k×40) ms out of every (n×160) ms.
Introduce a new parameter n, to be configured for support MBMS, from the set {2,4,8,16}.
Introduce a new parameter k, to be configured for support MBMS, from the set {4,5,6,7,…,63}
In the absence of the above parameters {n,k}, all non-MBSFN subframes containing cell acquisition signals in an MBMS-dedicated cell shall be transmitted
NOTE: For a MBMS-dedicated cell, there is no RAN4 impact from the above TEI proposal.
Agreement
Adopt the following TP to Section 6.2.1.4.1, TS 38.214.
RAN1#120
Agreement
Extend Rel-18’s UL frequency hopping UL SRS for positioning transmission to non-RedCap UEs in a single carrier
UE capability for non-RedCap UEs for UL SRS frequency hopping for positioning transmission
Send LS to RAN2 to inform this agreement, whether new parameter is needed is up to RAN2 discussion.
Agreement
Send LS R1-2501573 to RAN2 with following information:
In RAN1#120 meeting TEI agenda, RAN1 has made the following agreement for enabling non-RedCap UE performing UL SRS frequency hopping for positioning:
As this agreement may relate to RAN2 specification, this liaison informs RAN2 about this agreement and whether new parameter for non-RedCap UE UL frequency hopping is needed is up to RAN2 discussion.
To RAN2
ACTION: RAN1 respectfully asks RAN2 to take the agreement into account in their Rel-19 specification, and feedback if there is any spec impact.
Agreement
If a UE is instructed to monitor PDCCH according to search space sets with a group index other than a designated index, the UE stops PDCCH monitoring according to search space sets with the group index and start PDCCH monitoring according to search space sets with the designated group index from the first slot that is at least P_switch symbols after the last symbol of a PUCCH carrying an SR.
Introduce corresponding UE capability and RRC parameters to enable/disable the above feature and indicate the designated SSSG index.
Send LS to RAN2 to inform above agreement and ask for the support of the UE capability and the corresponding RRC parameters.
Agreement
To resolve ambiguities with concurrent configuration of SRS-CS and ulTxswitch in a case where a UE configured with SRS CS on target CC and its “switch-from” CC on CC2 and configured with UL Tx switching operation for UL CC2 and at least one UL CC1
Confirm that the prioritization rules in 38.214 Sec. 6.2.1.3 are applied between target and CC1, regardless of SRS-AS antenna port configuration on target CC, if UE indicates based on srs-SwitchingAffectedBandsListNR-r17 that SRS-CS on target impacts CC1, where CC1 is one of the CC(s) which may share Tx chains with source CC. No spec change is needed.
Note: if UE does not indicate srs-SwitchingAffectedBandsListNR-r17, UE can only perform simultaneous transmission when the total number of involved Tx chains for simultaneous transmission on all the bands/carriers is not greater than number of Tx chains supported by the UE for simultaneous UL transmission. No spec change is needed.
If the UE is under the operation state in which all Tx chains are available at the source CC, the required switching time before the beginning of SRS-CS transmission on target CC is SRS-SwitchingTimeNR. Otherwise, the required switching time before the beginning of SRS-CS transmission on target CC is indicated by a UE capability. Details about UE capability will be discussed in UE feature session.
The existing scheduling restriction of maximum one switching per reference slot for UL Tx switching is also taking into account the triggered SRS CS
After SRS transmissions within an SRS resource set is done, if UE is indicated to transmit on CC1, the required switching time between the end of SRS-CS transmission on target CC and start of UL transmission on CC1 is indicated by the UE capability defined above. Otherwise, it is assumed for the determination of any future switching time that all Tx chains are returned to the source CC, and the RF tuning time to switch from target to source will be SRS-SwitchingTimeN
RAN1#119
Agreement
For up to 32 HARQ process numbers for TN in FR1 and FR2-1,
The value ranges of the new RRC parameters are defined as follows
harq-ProcessNumberSizeDCI-0-1-Ext-r19 with value range of ‘INTEGER (5)’,
harq-ProcessNumberSizeDCI-1-1-Ext-r19 with value range of ‘INTEGER (5)’,
harq-ProcessNumberSizeDCI-0-2-Ext-r19 with value range of ‘INTEGER (0..5)’,
harq-ProcessNumberSizeDCI-1-2-Ext-r19 with value range of ‘INTEGER (0..5)’,
harq-ProcessNumberSizeDCI-0-3-Ext-r19 with value range of ‘INTEGER (0..5)’,
harq-ProcessNumberSizeDCI-1-3-Ext-r19 with value range of ‘INTEGER (0..5)’.
RAN1#118bis
Agreement
For the indication of whether a UE can simultaneously perform SRS carrier switches
srs-SwitchingAffectedBandsListNR-r17 is the baseline for indication.
Details about UE capability will be discussed in UE feature session.
The structure of UE capability signalling is reused
Two SRS carrier switches are considered to be simultaneous if the SRS transmission (including RF retuning time) in both CCs overlap in time.
A UE that indicates it is not capable of simultaneous SRS carrier switching among a set of switching pairs is not expected to be configured / scheduled with simultaneous SRS carrier switching in the set of switching pairs.
Note: except for UE capability, the spec impact is only 38.214
Agreement
Support a maximum of 32 HARQ process numbers for TN in FR1 and FR2-1 in Rel-19.
Introduce new UE capabilities, by duplicating the Rel-17 UE FGs 24-8/24-9 defined for FR2-2 to FR1 and FR2-1.
The reporting granularity of the UE capabilities is changed to ‘per FSPC’.
Introduce new RRC parameters, harq-ProcessNumberSizeDCI-0-1-Ext-r19, harq-ProcessNumberSizeDCI-1-1-Ext-r19, harq-ProcessNumberSizeDCI-0-2-Ext-r19, harq-ProcessNumberSizeDCI-1-2-Ext-r19, harq-ProcessNumberSizeDCI-0-3-Ext-r19, harq-ProcessNumberSizeDCI-1-3-Ext-r19.
For FR1, the above downlink related parameters can only be configured when the maximum number of layers configured for PDSCH is up to 4.
For FR1, the above uplink related parameters can only be configured when the maximum number of layers configured for PUSCH is up to 4.
Agreement
For the indication of whether a UE can simultaneously perform SRS carrier switches
srs-SwitchingAffectedBandsListNR-r17 is the baseline for indication.
Details about UE capability will be discussed in UE feature session.
The structure of UE capability signalling is reused
Two SRS carrier switches are considered to be simultaneous if the SRS transmission (including RF retuning time) in both CCs overlap in time.
A UE that indicates it is not capable of simultaneous SRS carrier switching among a set of switching pairs is not expected to be configured / scheduled with simultaneous SRS carrier switching in the set of switching pairs.
Note: except for UE capability, the spec impact is only 38.214
Agreement
Support a maximum of 32 HARQ process numbers for TN in FR1 and FR2-1 in Rel-19.
Introduce new UE capabilities, by duplicating the Rel-17 UE FGs 24-8/24-9 defined for FR2-2 to FR1 and FR2-1.
The reporting granularity of the UE capabilities is changed to ‘per FSPC’.
Introduce new RRC parameters, harq-ProcessNumberSizeDCI-0-1-Ext-r19, harq-ProcessNumberSizeDCI-1-1-Ext-r19, harq-ProcessNumberSizeDCI-0-2-Ext-r19, harq-ProcessNumberSizeDCI-1-2-Ext-r19, harq-ProcessNumberSizeDCI-0-3-Ext-r19, harq-ProcessNumberSizeDCI-1-3-Ext-r19.
For FR1, the above downlink related parameters can only be configured when the maximum number of layers configured for PDSCH is up to 4.
For FR1, the above uplink related parameters can only be configured when the maximum number of layers configured for PUSCH is up to 4.
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| R1-2504522.docx |
3GPP TSG-RAN WG1 Meeting #121. R1-2504522
St Julian’s, Malta, May 19th – 23th, 2025
Agenda item: 9.14
Source: Moderator (NTT DOCOMO, INC.)
Title: FL Summary #2 on Rel-19 TEIs
Document for: Discussion and Decision
|
Conclusion
Agreement
From RAN1 perspective, values of the parameters n and k are configured in SIB1-MBMS.
Final decision is up to RAN2
Agreements in Rel-19 TEI
RAN1#120bis
Agreement
For simultaneous CSI-RS reception in UE features 2-33, 2-36, 2-40, 2-41, 2-43, 16-3a and 16-3b, define 1 new UE capability:
UE capability 1: To allow the UE to indicate that CSI-RS ports within one periodic/semi-persistent CSI-RS resource, as well as the periodic/semi-persistent CSI-RS resource, are counted as one resource, even if the periodic/semi-persistent CSI-RS resource is referred by N Report Settings.
Agreement
The non-MBSFN subframes containing the cell acquisition signals (PSS/SSS/PBCH/SIB1) in an MBMS-dedicated cell shall only be transmitted within the first (k×40) ms out of every (n×160) ms.
Introduce a new parameter n, to be configured for support MBMS, from the set {2,4,8,16}.
Introduce a new parameter k, to be configured for support MBMS, from the set {4,5,6,7,…,63}
In the absence of the above parameters {n,k}, all non-MBSFN subframes containing cell acquisition signals in an MBMS-dedicated cell shall be transmitted
NOTE: For a MBMS-dedicated cell, there is no RAN4 impact from the above TEI proposal.
Agreement
Adopt the following TP to Section 6.2.1.4.1, TS 38.214.
RAN1#120
Agreement
Extend Rel-18’s UL frequency hopping UL SRS for positioning transmission to non-RedCap UEs in a single carrier
UE capability for non-RedCap UEs for UL SRS frequency hopping for positioning transmission
Send LS to RAN2 to inform this agreement, whether new parameter is needed is up to RAN2 discussion.
Agreement
Send LS R1-2501573 to RAN2 with following information:
In RAN1#120 meeting TEI agenda, RAN1 has made the following agreement for enabling non-RedCap UE performing UL SRS frequency hopping for positioning:
As this agreement may relate to RAN2 specification, this liaison informs RAN2 about this agreement and whether new parameter for non-RedCap UE UL frequency hopping is needed is up to RAN2 discussion.
To RAN2
ACTION: RAN1 respectfully asks RAN2 to take the agreement into account in their Rel-19 specification, and feedback if there is any spec impact.
Agreement
If a UE is instructed to monitor PDCCH according to search space sets with a group index other than a designated index, the UE stops PDCCH monitoring according to search space sets with the group index and start PDCCH monitoring according to search space sets with the designated group index from the first slot that is at least P_switch symbols after the last symbol of a PUCCH carrying an SR.
Introduce corresponding UE capability and RRC parameters to enable/disable the above feature and indicate the designated SSSG index.
Send LS to RAN2 to inform above agreement and ask for the support of the UE capability and the corresponding RRC parameters.
Agreement
To resolve ambiguities with concurrent configuration of SRS-CS and ulTxswitch in a case where a UE configured with SRS CS on target CC and its “switch-from” CC on CC2 and configured with UL Tx switching operation for UL CC2 and at least one UL CC1
Confirm that the prioritization rules in 38.214 Sec. 6.2.1.3 are applied between target and CC1, regardless of SRS-AS antenna port configuration on target CC, if UE indicates based on srs-SwitchingAffectedBandsListNR-r17 that SRS-CS on target impacts CC1, where CC1 is one of the CC(s) which may share Tx chains with source CC. No spec change is needed.
Note: if UE does not indicate srs-SwitchingAffectedBandsListNR-r17, UE can only perform simultaneous transmission when the total number of involved Tx chains for simultaneous transmission on all the bands/carriers is not greater than number of Tx chains supported by the UE for simultaneous UL transmission. No spec change is needed.
If the UE is under the operation state in which all Tx chains are available at the source CC, the required switching time before the beginning of SRS-CS transmission on target CC is SRS-SwitchingTimeNR. Otherwise, the required switching time before the beginning of SRS-CS transmission on target CC is indicated by a UE capability. Details about UE capability will be discussed in UE feature session.
The existing scheduling restriction of maximum one switching per reference slot for UL Tx switching is also taking into account the triggered SRS CS
After SRS transmissions within an SRS resource set is done, if UE is indicated to transmit on CC1, the required switching time between the end of SRS-CS transmission on target CC and start of UL transmission on CC1 is indicated by the UE capability defined above. Otherwise, it is assumed for the determination of any future switching time that all Tx chains are returned to the source CC, and the RF tuning time to switch from target to source will be SRS-SwitchingTimeN
RAN1#119
Agreement
For up to 32 HARQ process numbers for TN in FR1 and FR2-1,
The value ranges of the new RRC parameters are defined as follows
harq-ProcessNumberSizeDCI-0-1-Ext-r19 with value range of ‘INTEGER (5)’,
harq-ProcessNumberSizeDCI-1-1-Ext-r19 with value range of ‘INTEGER (5)’,
harq-ProcessNumberSizeDCI-0-2-Ext-r19 with value range of ‘INTEGER (0..5)’,
harq-ProcessNumberSizeDCI-1-2-Ext-r19 with value range of ‘INTEGER (0..5)’,
harq-ProcessNumberSizeDCI-0-3-Ext-r19 with value range of ‘INTEGER (0..5)’,
harq-ProcessNumberSizeDCI-1-3-Ext-r19 with value range of ‘INTEGER (0..5)’.
RAN1#118bis
Agreement
For the indication of whether a UE can simultaneously perform SRS carrier switches
srs-SwitchingAffectedBandsListNR-r17 is the baseline for indication.
Details about UE capability will be discussed in UE feature session.
The structure of UE capability signalling is reused
Two SRS carrier switches are considered to be simultaneous if the SRS transmission (including RF retuning time) in both CCs overlap in time.
A UE that indicates it is not capable of simultaneous SRS carrier switching among a set of switching pairs is not expected to be configured / scheduled with simultaneous SRS carrier switching in the set of switching pairs.
Note: except for UE capability, the spec impact is only 38.214
Agreement
Support a maximum of 32 HARQ process numbers for TN in FR1 and FR2-1 in Rel-19.
Introduce new UE capabilities, by duplicating the Rel-17 UE FGs 24-8/24-9 defined for FR2-2 to FR1 and FR2-1.
The reporting granularity of the UE capabilities is changed to ‘per FSPC’.
Introduce new RRC parameters, harq-ProcessNumberSizeDCI-0-1-Ext-r19, harq-ProcessNumberSizeDCI-1-1-Ext-r19, harq-ProcessNumberSizeDCI-0-2-Ext-r19, harq-ProcessNumberSizeDCI-1-2-Ext-r19, harq-ProcessNumberSizeDCI-0-3-Ext-r19, harq-ProcessNumberSizeDCI-1-3-Ext-r19.
For FR1, the above downlink related parameters can only be configured when the maximum number of layers configured for PDSCH is up to 4.
For FR1, the above uplink related parameters can only be configured when the maximum number of layers configured for PUSCH is up to 4.
Agreement
For the indication of whether a UE can simultaneously perform SRS carrier switches
srs-SwitchingAffectedBandsListNR-r17 is the baseline for indication.
Details about UE capability will be discussed in UE feature session.
The structure of UE capability signalling is reused
Two SRS carrier switches are considered to be simultaneous if the SRS transmission (including RF retuning time) in both CCs overlap in time.
A UE that indicates it is not capable of simultaneous SRS carrier switching among a set of switching pairs is not expected to be configured / scheduled with simultaneous SRS carrier switching in the set of switching pairs.
Note: except for UE capability, the spec impact is only 38.214
Agreement
Support a maximum of 32 HARQ process numbers for TN in FR1 and FR2-1 in Rel-19.
Introduce new UE capabilities, by duplicating the Rel-17 UE FGs 24-8/24-9 defined for FR2-2 to FR1 and FR2-1.
The reporting granularity of the UE capabilities is changed to ‘per FSPC’.
Introduce new RRC parameters, harq-ProcessNumberSizeDCI-0-1-Ext-r19, harq-ProcessNumberSizeDCI-1-1-Ext-r19, harq-ProcessNumberSizeDCI-0-2-Ext-r19, harq-ProcessNumberSizeDCI-1-2-Ext-r19, harq-ProcessNumberSizeDCI-0-3-Ext-r19, harq-ProcessNumberSizeDCI-1-3-Ext-r19.
For FR1, the above downlink related parameters can only be configured when the maximum number of layers configured for PDSCH is up to 4.
For FR1, the above uplink related parameters can only be configured when the maximum number of layers configured for PUSCH is up to 4.
|
| R1-2504653 Higher layer parameters for Rel-19 TEI_5GB_CAS_Muting after RAN1#120bis.docx |
3GPP TSG-RAN WG1 Meeting #121 R1-2504653
Malta, MT, 19th – 23rd May, 2025
Agenda Item: 9.14
Source: Rapporteur (EBU)
Title: Higher layer parameters for Rel-19 TEI_5GB_CAS_Muting after RAN1#120bis
Document for: Discussion
1 |
TDoc file conclusion not found |
| R1-2504830.docx |
3GPP TSG RAN WG1 Meeting #121 R1-2504830
St Julian's, Malta, May 19th – 23rd, 2025
Agenda item: 9.14
Source: Moderator (MediaTek)
Title: Summary #1 of Discussion on RAN4 LS on UL Tx switching for TEI19
Document for: Discussion and Decision
|
Conclusion
Contact Person
Please provide/update the information of the contact person in the following table to facilitate the discussions.
|
| R1-2504852.docx |
3GPP TSG RAN WG1 Meeting #121 R1-2504852
St Julian's, Malta, May 19th – 23rd, 2025
Agenda item: 9.14
Source: Moderator (MediaTek)
Title: Summary #2 of Discussion on RAN4 LS on UL Tx switching for TEI19
Document for: Discussion and Decision
|
Conclusion
Contact Person
Please provide/update the information of the contact person in the following table to facilitate the discussions.
|
| R1-2504856.docx |
3GPP TSG-RAN WG1 Meeting #121. R1-2504856
St Julian’s, Malta, May 19th – 23th, 2025
Agenda item: 9.14
Source: Moderator (NTT DOCOMO, INC.)
Title: FL Summary #3 on Rel-19 TEIs
Document for: Discussion and Decision
|
Conclusion
For TEI [SRSCS_ULTxSwitch], no new RRC parameters are introduced.
Agreements in Rel-19 TEI
RAN1#120bis
Agreement
For simultaneous CSI-RS reception in UE features 2-33, 2-36, 2-40, 2-41, 2-43, 16-3a and 16-3b, define 1 new UE capability:
UE capability 1: To allow the UE to indicate that CSI-RS ports within one periodic/semi-persistent CSI-RS resource, as well as the periodic/semi-persistent CSI-RS resource, are counted as one resource, even if the periodic/semi-persistent CSI-RS resource is referred by N Report Settings.
Agreement
The non-MBSFN subframes containing the cell acquisition signals (PSS/SSS/PBCH/SIB1) in an MBMS-dedicated cell shall only be transmitted within the first (k×40) ms out of every (n×160) ms.
Introduce a new parameter n, to be configured for support MBMS, from the set {2,4,8,16}.
Introduce a new parameter k, to be configured for support MBMS, from the set {4,5,6,7,…,63}
In the absence of the above parameters {n,k}, all non-MBSFN subframes containing cell acquisition signals in an MBMS-dedicated cell shall be transmitted
NOTE: For a MBMS-dedicated cell, there is no RAN4 impact from the above TEI proposal.
Agreement
Adopt the following TP to Section 6.2.1.4.1, TS 38.214.
RAN1#120
Agreement
Extend Rel-18’s UL frequency hopping UL SRS for positioning transmission to non-RedCap UEs in a single carrier
UE capability for non-RedCap UEs for UL SRS frequency hopping for positioning transmission
Send LS to RAN2 to inform this agreement, whether new parameter is needed is up to RAN2 discussion.
Agreement
Send LS R1-2501573 to RAN2 with following information:
In RAN1#120 meeting TEI agenda, RAN1 has made the following agreement for enabling non-RedCap UE performing UL SRS frequency hopping for positioning:
As this agreement may relate to RAN2 specification, this liaison informs RAN2 about this agreement and whether new parameter for non-RedCap UE UL frequency hopping is needed is up to RAN2 discussion.
To RAN2
ACTION: RAN1 respectfully asks RAN2 to take the agreement into account in their Rel-19 specification, and feedback if there is any spec impact.
Agreement
If a UE is instructed to monitor PDCCH according to search space sets with a group index other than a designated index, the UE stops PDCCH monitoring according to search space sets with the group index and start PDCCH monitoring according to search space sets with the designated group index from the first slot that is at least P_switch symbols after the last symbol of a PUCCH carrying an SR.
Introduce corresponding UE capability and RRC parameters to enable/disable the above feature and indicate the designated SSSG index.
Send LS to RAN2 to inform above agreement and ask for the support of the UE capability and the corresponding RRC parameters.
Agreement
To resolve ambiguities with concurrent configuration of SRS-CS and ulTxswitch in a case where a UE configured with SRS CS on target CC and its “switch-from” CC on CC2 and configured with UL Tx switching operation for UL CC2 and at least one UL CC1
Confirm that the prioritization rules in 38.214 Sec. 6.2.1.3 are applied between target and CC1, regardless of SRS-AS antenna port configuration on target CC, if UE indicates based on srs-SwitchingAffectedBandsListNR-r17 that SRS-CS on target impacts CC1, where CC1 is one of the CC(s) which may share Tx chains with source CC. No spec change is needed.
Note: if UE does not indicate srs-SwitchingAffectedBandsListNR-r17, UE can only perform simultaneous transmission when the total number of involved Tx chains for simultaneous transmission on all the bands/carriers is not greater than number of Tx chains supported by the UE for simultaneous UL transmission. No spec change is needed.
If the UE is under the operation state in which all Tx chains are available at the source CC, the required switching time before the beginning of SRS-CS transmission on target CC is SRS-SwitchingTimeNR. Otherwise, the required switching time before the beginning of SRS-CS transmission on target CC is indicated by a UE capability. Details about UE capability will be discussed in UE feature session.
The existing scheduling restriction of maximum one switching per reference slot for UL Tx switching is also taking into account the triggered SRS CS
After SRS transmissions within an SRS resource set is done, if UE is indicated to transmit on CC1, the required switching time between the end of SRS-CS transmission on target CC and start of UL transmission on CC1 is indicated by the UE capability defined above. Otherwise, it is assumed for the determination of any future switching time that all Tx chains are returned to the source CC, and the RF tuning time to switch from target to source will be SRS-SwitchingTimeN
RAN1#119
Agreement
For up to 32 HARQ process numbers for TN in FR1 and FR2-1,
The value ranges of the new RRC parameters are defined as follows
harq-ProcessNumberSizeDCI-0-1-Ext-r19 with value range of ‘INTEGER (5)’,
harq-ProcessNumberSizeDCI-1-1-Ext-r19 with value range of ‘INTEGER (5)’,
harq-ProcessNumberSizeDCI-0-2-Ext-r19 with value range of ‘INTEGER (0..5)’,
harq-ProcessNumberSizeDCI-1-2-Ext-r19 with value range of ‘INTEGER (0..5)’,
harq-ProcessNumberSizeDCI-0-3-Ext-r19 with value range of ‘INTEGER (0..5)’,
harq-ProcessNumberSizeDCI-1-3-Ext-r19 with value range of ‘INTEGER (0..5)’.
RAN1#118bis
Agreement
For the indication of whether a UE can simultaneously perform SRS carrier switches
srs-SwitchingAffectedBandsListNR-r17 is the baseline for indication.
Details about UE capability will be discussed in UE feature session.
The structure of UE capability signalling is reused
Two SRS carrier switches are considered to be simultaneous if the SRS transmission (including RF retuning time) in both CCs overlap in time.
A UE that indicates it is not capable of simultaneous SRS carrier switching among a set of switching pairs is not expected to be configured / scheduled with simultaneous SRS carrier switching in the set of switching pairs.
Note: except for UE capability, the spec impact is only 38.214
Agreement
Support a maximum of 32 HARQ process numbers for TN in FR1 and FR2-1 in Rel-19.
Introduce new UE capabilities, by duplicating the Rel-17 UE FGs 24-8/24-9 defined for FR2-2 to FR1 and FR2-1.
The reporting granularity of the UE capabilities is changed to ‘per FSPC’.
Introduce new RRC parameters, harq-ProcessNumberSizeDCI-0-1-Ext-r19, harq-ProcessNumberSizeDCI-1-1-Ext-r19, harq-ProcessNumberSizeDCI-0-2-Ext-r19, harq-ProcessNumberSizeDCI-1-2-Ext-r19, harq-ProcessNumberSizeDCI-0-3-Ext-r19, harq-ProcessNumberSizeDCI-1-3-Ext-r19.
For FR1, the above downlink related parameters can only be configured when the maximum number of layers configured for PDSCH is up to 4.
For FR1, the above uplink related parameters can only be configured when the maximum number of layers configured for PUSCH is up to 4.
Agreement
For the indication of whether a UE can simultaneously perform SRS carrier switches
srs-SwitchingAffectedBandsListNR-r17 is the baseline for indication.
Details about UE capability will be discussed in UE feature session.
The structure of UE capability signalling is reused
Two SRS carrier switches are considered to be simultaneous if the SRS transmission (including RF retuning time) in both CCs overlap in time.
A UE that indicates it is not capable of simultaneous SRS carrier switching among a set of switching pairs is not expected to be configured / scheduled with simultaneous SRS carrier switching in the set of switching pairs.
Note: except for UE capability, the spec impact is only 38.214
Agreement
Support a maximum of 32 HARQ process numbers for TN in FR1 and FR2-1 in Rel-19.
Introduce new UE capabilities, by duplicating the Rel-17 UE FGs 24-8/24-9 defined for FR2-2 to FR1 and FR2-1.
The reporting granularity of the UE capabilities is changed to ‘per FSPC’.
Introduce new RRC parameters, harq-ProcessNumberSizeDCI-0-1-Ext-r19, harq-ProcessNumberSizeDCI-1-1-Ext-r19, harq-ProcessNumberSizeDCI-0-2-Ext-r19, harq-ProcessNumberSizeDCI-1-2-Ext-r19, harq-ProcessNumberSizeDCI-0-3-Ext-r19, harq-ProcessNumberSizeDCI-1-3-Ext-r19.
For FR1, the above downlink related parameters can only be configured when the maximum number of layers configured for PDSCH is up to 4.
For FR1, the above uplink related parameters can only be configured when the maximum number of layers configured for PUSCH is up to 4.
|
| R1-2504879.docx |
3GPP TSG RAN WG1 Meeting #121 R1-2504879
St Julian's, Malta, May 19th – 23rd, 2025
Agenda item: 9.14
Source: Moderator (MediaTek)
Title: Summary #3 of Discussion on RAN4 LS on UL Tx switching for TEI19
Document for: Discussion and Decision
|
Conclusion
Contact Person
Please provide/update the information of the contact person in the following table to facilitate the discussions.
|
| R1-2504900.doc |
TDoc file reading error |
|
| R1-2504949.docx |
3GPP TSG RAN WG1 Meeting #121 R1-2504949
St Julian's, Malta, May 19th – 23rd, 2025
Agenda item: 9.14
Source: Moderator (MediaTek)
Title: Summary #4 of Discussion on RAN4 LS on UL Tx switching for TEI19
Document for: Discussion and Decision
|
Conclusion
Contact Person
Please provide/update the information of the contact person in the following table to facilitate the discussions.
|