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Content for  TS 38.331  Word version:  17.4.0

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5.5.3  Performing measurementsp. 185

5.5.3.1  Generalp. 185

An RRC_CONNECTED UE shall derive cell measurement results by measuring one or multiple beams associated per cell as configured by the network, as described in clause 5.5.3.3. For all cell measurement results, except for RSSI, and CLI measurement results in RRC_CONNECTED, the UE applies the layer 3 filtering as specified in clause 5.5.3.2, before using the measured results for evaluation of reporting criteria, measurement reporting or the criteria to trigger conditional reconfiguration execution. For cell measurements, the network can configure RSRP, RSRQ, SINR, RSCP or EcN0 as trigger quantity. For CLI measurements, the network can configure SRS-RSRP or CLI-RSSI as trigger quantity. For cell and beam measurements, reporting quantities can be any combination of quantities (i.e. only RSRP; only RSRQ; only SINR; RSRP and RSRQ; RSRP and SINR; RSRQ and SINR; RSRP, RSRQ and SINR; only RSCP; only EcN0; RSCP and EcN0), irrespective of the trigger quantity, and for CLI measurements, reporting quantities can be either SRS-RSRP or CLI-RSSI. For conditional reconfiguration execution, the network can configure up to 2 quantities, both using same RS type. The UE does not apply the layer 3 filtering as specified in clause 5.5.3.2 to derive the CBR measurements. The UE does not apply the layer 3 filtering as specified in clause 5.5.3.2 to derive the Rx-Tx time difference measurements.
The network may also configure the UE to report measurement information per beam (which can either be measurement results per beam with respective beam identifier(s) or only beam identifier(s)), derived as described in clause 5.5.3.3a. If beam measurement information is configured to be included in measurement reports, the UE applies the layer 3 beam filtering as specified in clause 5.5.3.2. On the other hand, the exact L1 filtering of beam measurements used to derive cell measurement results is implementation dependent.
The UE shall:
1 >
whenever the UE has a measConfig, perform RSRP and RSRQ measurements for each serving cell for which servingCellMO is configured as follows:
2 >
if the reportConfig associated with at least one measId included in the measIdList within VarMeasConfig contains an rsType set to ssb and ssb-ConfigMobility is configured in the measObject indicated by the servingCellMO:
3 >
if the reportConfig associated with at least one measId included in the measIdList within VarMeasConfig contains a reportQuantityRS-Indexes and maxNrofRS-IndexesToReport and contains an rsType set to ssb:
4 >
derive layer 3 filtered RSRP and RSRQ per beam for the serving cell based on SS/PBCH block, as described in clause 5.5.3.3a;
3 >
derive serving cell measurement results based on SS/PBCH block, as described in clause 5.5.3.3;
2 >
if the reportConfig associated with at least one measId included in the measIdList within VarMeasConfig contains an rsType set to csi-rs and CSI-RS-ResourceConfigMobility is configured in the measObject indicated by the servingCellMO:
3 >
if the reportConfig associated with at least one measId included in the measIdList within VarMeasConfig contains a reportQuantityRS-Indexes and maxNrofRS-IndexesToReport and contains an rsType set to csi-rs:
4 >
derive layer 3 filtered RSRP and RSRQ per beam for the serving cell based on CSI-RS, as described in clause 5.5.3.3a;
3 >
derive serving cell measurement results based on CSI-RS, as described in clause 5.5.3.3;
1 >
for each serving cell for which servingCellMO is configured, if the reportConfig associated with at least one measId included in the measIdList within VarMeasConfig contains SINR as trigger quantity and/or reporting quantity:
2 >
if the reportConfig contains rsType set to ssb and ssb-ConfigMobility is configured in the servingCellMO:
3 >
if the reportConfig contains a reportQuantityRS-Indexes and maxNrofRS-IndexesToReport:
4 >
derive layer 3 filtered SINR per beam for the serving cell based on SS/PBCH block, as described in clause 5.5.3.3a;
3 >
derive serving cell SINR based on SS/PBCH block, as described in clause 5.5.3.3;
2 >
if the reportConfig contains rsType set to csi-rs and CSI-RS-ResourceConfigMobility is configured in the servingCellMO:
3 >
if the reportConfig contains a reportQuantityRS-Indexes and maxNrofRS-IndexesToReport:
4 >
derive layer 3 filtered SINR per beam for the serving cell based on CSI-RS, as described in clause 5.5.3.3a;
3 >
derive serving cell SINR based on CSI-RS, as described in clause 5.5.3.3;
1 >
for each measId included in the measIdList within VarMeasConfig:
2 >
if the reportType for the associated reportConfig is set to reportCGI and timer T321 is running:
3 >
if useAutonomousGaps is configured for the associated reportConfig:
4 >
perform the corresponding measurements on the frequency and RAT indicated in the associated measObject using autonomous gaps as necessary;
3 >
else:
4 >
perform the corresponding measurements on the frequency and RAT indicated in the associated measObject using available idle periods;
3 >
if the cell indicated by reportCGI field for the associated measObject is an NR cell and that indicated cell is broadcasting SIB1 (see clause 13 of TS 38.213):
4 >
try to acquire SIB1 in the concerned cell;
3 >
if the cell indicated by reportCGI field is an E-UTRA cell:
4 >
try to acquire SystemInformationBlockType1 in the concerned cell;
2 >
if the ul-DelayValueConfig is configured for the associated reportConfig:
3 >
ignore the measObject;
3 >
for each of the configured DRBs, configure the PDCP layer to perform corresponding average UL PDCP packet delay measurement per DRB;
2 >
if the ul-ExcessDelayConfig is configured for the associated reportConfig:
3 >
ignore the measObject;
3 >
for each of the configured DRBs, configure the PDCP layer to perform corresponding UL PDCP Excess Packet Delay delay measurement according to the configured threshold per DRB;
2 >
if the reportType for the associated reportConfig is periodical, eventTriggered; or
2 >
if the reportType for the associated reportConfig is condTriggerConfig, the measId is within the MCG measConfig and is indicated in the condExecutionCond associated to a condReconfigId in the MCG VarConditionalReconfig (for CHO, CPA or MN-initiated inter-SN CPC in NR-DC); or
2 >
if the reportType for the associated reportConfig is condTriggerConfig, the measId is within the SCG VarMeasConfig and is indicated in the condExecutionCond associated to a condReconfigId in the SCG VarConditionalReconfig (for intra-SN CPC); or
2 >
if the reportType for the associated reportConfig is condTriggerConfig, the measId is within the SCG VarMeasConfig and is indicated in the condExecutionCondSCG associated to a condReconfigId in the MCG VarConditionalReconfig (for SN-initiated inter-SN CPC in NR-DC); or
2 >
if the reportType for the associated reportConfig is condTriggerConfig, the measId is within the SCG VarMeasConfig and is indicated in the triggerConditionSN associated to a condReconfigurationId in VarConditionalReconfiguration as specified in TS 36.331 (for SN-initiated inter-SN CPC in EN-DC):
3 >
if a measurement gap configuration is setup, or
3 >
if the UE does not require measurement gaps to perform the concerned measurements:
4 >
if s-MeasureConfig is not configured, or
4 >
if s-MeasureConfig is set to ssb-RSRP and the NR SpCell RSRP based on SS/PBCH block, after layer 3 filtering, is lower than ssb-RSRP, or
4 >
if s-MeasureConfig is set to csi-RSRP and the NR SpCell RSRP based on CSI-RS, after layer 3 filtering, is lower than csi-RSRP:
5 >
if the measObject is associated to NR and the rsType is set to csi-rs:
6 >
if reportQuantityRS-Indexes and maxNrofRS-IndexesToReport for the associated reportConfig are configured:
7 >
derive layer 3 filtered beam measurements only based on CSI-RS for each measurement quantity indicated in reportQuantityRS-Indexes, as described in clause 5.5.3.3a;
6 >
derive cell measurement results based on CSI-RS for the trigger quantity and each measurement quantity indicated in reportQuantityCell using parameters from the associated measObject, as described in clause 5.5.3.3;
5 >
if the measObject is associated to NR and the rsType is set to ssb:
6 >
if reportQuantityRS-Indexes and maxNrofRS-IndexesToReport for the associated reportConfig are configured:
7 >
derive layer 3 beam measurements only based on SS/PBCH block for each measurement quantity indicated in reportQuantityRS-Indexes, as described in clause 5.5.3.3a;
6 >
derive cell measurement results based on SS/PBCH block for the trigger quantity and each measurement quantity indicated in reportQuantityCell using parameters from the associated measObject, as described in clause 5.5.3.3;
5 >
if the measObject is associated to E-UTRA:
6 >
perform the corresponding measurements associated to neighbouring cells on the frequencies indicated in the concerned measObject, as described in clause 5.5.3.2;
5 >
if the measObject is associated to UTRA-FDD:
6 >
perform the corresponding measurements associated to neighbouring cells on the frequencies indicated in the concerned measObject, as described in clause 5.5.3.2;
5 >
if the measObject is associated to L2 U2N Relay UE:
6 >
perform the corresponding measurements associated to candidate Relay UEs on the frequencies indicated in the concerned measObject, as described in clause 5.5.3.4;
4 >
if the measRSSI-ReportConfig is configured in the associated reportConfig:
5 >
perform the RSSI and channel occupancy measurements on the frequency indicated in the associated measObject;
2 >
if the reportType for the associated reportConfig is set to reportSFTD and the numberOfReportsSent as defined within the VarMeasReportList for this measId is less than one:
3 >
if the reportSFTD-Meas is set to true:
4 >
if the measObject is associated to E-UTRA:
5 >
perform SFTD measurements between the PCell and the E-UTRA PSCell;
5 >
if the reportRSRP is set to true;
6 >
perform RSRP measurements for the E-UTRA PSCell;
4 >
else if the measObject is associated to NR:
5 >
perform SFTD measurements between the PCell and the NR PSCell;
5 >
if the reportRSRP is set to true;
6 >
perform RSRP measurements for the NR PSCell based on SSB;
3 >
else if the reportSFTD-NeighMeas is included:
4 >
if the measObject is associated to NR:
5 >
if the drx-SFTD-NeighMeas is included:
6 >
perform SFTD measurements between the PCell and the NR neighbouring cell(s) detected based on parameters in the associated measObject using available idle periods;
5 >
else:
6 >
perform SFTD measurements between the PCell and the NR neighbouring cell(s) detected based on parameters in the associated measObject;
5 >
if the reportRSRP is set to true:
6 >
perform RSRP measurements based on SSB for the NR neighbouring cell(s) detected based on parameters in the associated measObject;
2 >
if the reportType for the associated reportConfig is cli-Periodical or cli-EventTriggered:
3 >
perform the corresponding measurements associated to CLI measurement resources indicated in the concerned measObjectCLI;
2 >
perform the evaluation of reporting criteria as specified in clause 5.5.4, except if reportConfig is condTriggerConfig.
The UE acting as a L2 U2N Remote UE whenever configured with measConfig shall:
1 >
perform the corresponding measurements associated to the serving L2 U2N Relay UE, as described in clause 5.5.3.4;
The UE capable of Rx-Tx time difference measurement when configured with measObjectRxTxDiff shall:
1 >
perform the corresponding Rx-Tx time difference measurements associated with downlink reference signals indicated in the concerned measObjectRxTxDiff.
The UE capable of CBR measurement when configured to transmit NR sidelink communication/discovery shall:
1 >
If the frequency used for NR sidelink communication/discovery is included in sl-FreqInfoToAddModList in sl-ConfigDedicatedNR within RRCReconfiguration message or included in sl-ConfigCommonNR within SIB12:
2 >
if the UE is in RRC_IDLE or in RRC_INACTIVE:
3 >
if configured with NR sidelink communication and the cell chosen for NR sidelink communication provides SIB12 which includes sl-TxPoolSelectedNormal or sl-TxPoolExceptional for the concerned frequency; or
3 >
if configured with NR sidelink discovery and the cell chosen for NR sidelink discovery provides SIB12 which includes sl-TxPoolSelectedNormal or sl-TxPoolExceptional but does not include sl-DiscTxPoolSelected for the concerned frequency:
4 >
perform CBR measurement on pool(s) in sl-TxPoolSelectedNormal or sl-TxPoolExceptional for the concerned frequency in SIB12;
3 >
if configured with NR sidelink discovery and the cell chosen for NR sidelink discovery provides SIB12 which includes sl-DiscTxPoolSelected for the concerned frequency:
4 >
perform CBR measurement on pools in sl-DiscTxPoolSelected and sl-TxPoolExceptional for the concerned frequency in SIB12;
2 >
if the UE is in RRC_CONNECTED:
3 >
if tx-PoolMeasToAddModList is included in VarMeasConfig:
4 >
perform CBR measurements on each transmission resource pool indicated in the tx-PoolMeasToAddModList;
3 >
if sl-DiscTxPoolSelected, sl-TxPoolSelectedNormal, sl-TxPoolScheduling or sl-TxPoolExceptional is included in sl-ConfigDedicatedNR for the concerned frequency within RRCReconfiguration:
4 >
perform CBR measurement on pool(s) in sl-DiscTxPoolSelected, sl-TxPoolSelectedNormal, sl-TxPoolScheduling and sl-TxPoolExceptional if included in sl-ConfigDedicatedNR for the concerned frequency within RRCReconfiguration;
3 >
else:
4 >
if configured with NR sidelink communication and the cell chosen for NR sidelink communication provides SIB12 which includes sl-TxPoolSelectedNormal or sl-TxPoolExceptional for the concerned frequency; or
4 >
if configured with NR sidelink discovery and the cell chosen for NR sidelink discovery provides SIB12 which includes sl-TxPoolSelectedNormal or sl-TxPoolExceptional but does not provide sl-DiscTxPoolSelected for the concerned frequency:
5 >
perform CBR measurement on pool(s) in sl-TxPoolSelectedNormal or sl-TxPoolExceptional for the concerned frequency in SIB12;
4 >
if configured with NR sidelink discovery and the cell chosen for NR sidelink discovery provides SIB12 which includes sl-DiscTxPoolSelected for the concerned frequency:
5 >
perform CBR measurement on pools in sl-DiscTxPoolSelected and sl-TxPoolExceptional for the concerned frequency in SIB12;
1 >
else:
2 >
if configured with NR sidelink communication and sl-TxPoolSelectedNormal is included in SidelinkPreconfigNR for the concerned frequency; or
2 >
if configured with NR sidelink discovery and sl-TxPoolSelectedNormal is included in SidelinkPreconfigNR but sl-DiscTxPoolSelected is not included in SidelinkPreconfigNR for the concerned frequency:
3 >
perform CBR measurement on pool(s) in sl-TxPoolSelectedNormal in SidelinkPreconfigNR for the concerned frequency.
2 >
if configured with NR sidelink discovery and sl-DiscTxPoolSelected is included in SidelinkPreconfigNR for the concerned frequency:
3 >
perform CBR measurement on pools in sl-DiscTxPoolSelected if included in SidelinkPreconfigNR.
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5.5.3.2  Layer 3 filteringp. 190

The UE shall:
1 >
for each cell measurement quantity, each beam measurement quantity, each sidelink measurement quantity as needed in clause 5.8.10, for each CLI measurement quantity that the UE performs measurements according to clause 5.5.3.1, and for each candidate L2 U2N Relay UE measurement quantity according to clause 5.5.3.4:
2 >
filter the measured result, before using for evaluation of reporting criteria or for measurement reporting, by the following formula:
Fn = (1 - a)*Fn-1 + a*Mn
where
Mn
is the latest received measurement result from the physical layer;
Fn
is the updated filtered measurement result, that is used for evaluation of reporting criteria or for measurement reporting;
Fn-1
is the old filtered measurement result, where F0 is set to M1 when the first measurement result from the physical layer is received; and for MeasObjectNR, a = 1/2(ki/4), where ki is the filterCoefficient for the corresponding measurement quantity of the i:th QuantityConfigNR in quantityConfigNR-List, and i is indicated by quantityConfigIndex in MeasObjectNR; for other measurements, a = 1/2(k/4), where k is the filterCoefficient for the corresponding measurement quantity received by the quantityConfig; for UTRA-FDD, a = 1/2(k/4), where k is the filterCoefficient for the corresponding measurement quantity received by quantityConfigUTRA-FDD in the QuantityConfig;
2 >
adapt the filter such that the time characteristics of the filter are preserved at different input rates, observing that the filterCoefficient k assumes a sample rate equal to X ms; The value of X is equivalent to one intra-frequency L1 measurement period as defined in TS 38.133 assuming non-DRX operation, and depends on frequency range.
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5.5.3.3  Derivation of cell measurement resultsp. 191

The network may configure the UE in RRC_CONNECTED to derive RSRP, RSRQ and SINR measurement results per cell associated to NR measurement objects based on parameters configured in the measObject (e.g. maximum number of beams to be averaged and beam consolidation thresholds) and in the reportConfig (rsType to be measured, SS/PBCH block or CSI-RS).
The network may configure the UE in RRC_IDLE or in RRC_INACTIVE to derive RSRP and RSRQ measurement results per cell associated to NR carriers based on parameters configured in measIdleCarrierListNR within VarMeasIdleConfig for measurements performed according to clause 5.7.8.2a.
The UE shall:
1 >
for each cell measurement quantity to be derived based on SS/PBCH block:
2 >
if nrofSS-BlocksToAverage is not configured in the associated measObject in RRC_CONNECTED or in the associated entry in measIdleCarrierListNR within VarMeasIdleConfig in RRC_IDLE/RRC_INACTIVE; or
2 >
if absThreshSS-BlocksConsolidation is not configured in the associated measObject in RRC_CONNECTED or in the associated entry in measIdleCarrierListNR within VarMeasIdleConfig in RRC_IDLE/RRC_INACTIVE; or
2 >
if the highest beam measurement quantity value is below or equal to absThreshSS-BlocksConsolidation:
3 >
derive each cell measurement quantity based on SS/PBCH block as the highest beam measurement quantity value, where each beam measurement quantity is described in TS 38.215;
2 >
else:
3 >
derive each cell measurement quantity based on SS/PBCH block as the linear power scale average of the highest beam measurement quantity values above absThreshSS-BlocksConsolidation where the total number of averaged beams shall not exceed nrofSS-BlocksToAverage, and where each beam measurement quantity is described in TS 38.215;
2 >
if in RRC_CONNECTED, apply layer 3 cell filtering as described in clause 5.5.3.2;
1 >
for each cell measurement quantity to be derived based on CSI-RS:
2 >
consider a CSI-RS resource to be applicable for deriving cell measurements when the concerned CSI-RS resource is included in the csi-rs-CellMobility including the physCellId of the cell in theCSI-RS-ResourceConfigMobility in the associated measObject;
2 >
if nrofCSI-RS-ResourcesToAverage in the associated measObject is not configured; or
2 >
if absThreshCSI-RS-Consolidation in the associated measObject is not configured; or
2 >
if the highest beam measurement quantity value is below or equal to absThreshCSI-RS-Consolidation:
3 >
derive each cell measurement quantity based on applicable CSI-RS resources for the cell as the highest beam measurement quantity value, where each beam measurement quantity is described in TS 38.215;
2 >
else:
3 >
derive each cell measurement quantity based on CSI-RS as the linear power scale average of the highest beam measurement quantity values above absThreshCSI-RS-Consolidation where the total number of averaged beams shall not exceed nrofCSI-RS-ResourcesToAverage;
2 >
apply layer 3 cell filtering as described in clause 5.5.3.2.
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5.5.3.3a  Derivation of layer 3 beam filtered measurementp. 192

The UE shall:
1 >
for each layer 3 beam filtered measurement quantity to be derived based on SS/PBCH block;
2 >
derive each configured beam measurement quantity based on SS/PBCH block as described in TS 38.215, and apply layer 3 beam filtering as described in clause 5.5.3.2;
1 >
for each layer 3 beam filtered measurement quantity to be derived based on CSI-RS;
2 >
derive each configured beam measurement quantity based on CSI-RS as described in TS 38.215, and apply layer 3 beam filtering as described in clause 5.5.3.2.
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5.5.3.4  Derivation of L2 U2N Relay UE measurement results |R17|p. 192

A UE may be configured by network to derive NR sidelink measurement results of serving L2 U2N Relay UE or candidate L2 U2N Relay UEs associated to the measurement objects configured in the measObjectRelay.
The UE shall:
1 >
for each L2 U2N Relay UE measurement quantity to be derived:
2 >
derive the corresponding measurement quantity based on DMRS as described in TS 38.215;
2 >
apply layer 3 filtering as described in clause 5.5.3.2;
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