MeasConfig

RRC IE · TS 38.331 v19.4.0 (2026-09) · clause 6.3.2

MeasConfig is an RRC information element of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.

First seen v15.0.0 (2018-01) · Last changed v19.1.0 (2026-01)

Definition

The IE MeasConfig specifies measurements to be performed by the UE, and covers intra-frequency, inter-frequency and inter-RAT mobility as well as configuration of measurement gaps.

MeasConfig ::=                      SEQUENCE {
    measObjectToRemoveList              MeasObjectToRemoveList                                              OPTIONAL,   -- Need N
    measObjectToAddModList              MeasObjectToAddModList                                              OPTIONAL,   -- Need N
    reportConfigToRemoveList            ReportConfigToRemoveList                                            OPTIONAL,   -- Need N
    reportConfigToAddModList            ReportConfigToAddModList                                            OPTIONAL,   -- Need N
    measIdToRemoveList                  MeasIdToRemoveList                                                  OPTIONAL,   -- Need N
    measIdToAddModList                  MeasIdToAddModList                                                  OPTIONAL,   -- Need N
    s-MeasureConfig                     CHOICE {
        ssb-RSRP                            RSRP-Range,
        csi-RSRP                            RSRP-Range
    }                                                                                                       OPTIONAL,   -- Need M
    quantityConfig                      QuantityConfig                                                      OPTIONAL,   -- Need M
    measGapConfig                       MeasGapConfig                                                       OPTIONAL,   -- Need M
    measGapSharingConfig                MeasGapSharingConfig                                                OPTIONAL,   -- Need M
    ...,
    [[
        interFrequencyConfig-NoGap-r16      ENUMERATED {true}                                                   OPTIONAL    -- Need R
    ]],
    [[
        effectiveMeasWindowConfig-r18       SetupRelease {MeasWindowConfig-r18}                                 OPTIONAL    -- Need M
    ]],
    [[
        cssf-Config-r19                     SEQUENCE {
            cssf-MeasMO-List-r19                CSSF-MeasMO-List-r19                                            OPTIONAL    -- Need R
        }                                                                                                       OPTIONAL,   -- Need R
        fbs-Config-r19                      SetupRelease {FBS-Config-r19}                                       OPTIONAL,   -- Need M
        speedStatePars-r19                  SetupRelease {SpeedStatePars-r19}                                   OPTIONAL    -- Need M
    ]]
}

Candidate change requests of v19.1.0

The CRs whose title or cover names this change, strong and likely matches only.

CR 5615 (strong): Adding Mobility State in RRC_CONNECTED [SpeedStatePars]
CR 5566 (likely): Introduction of Rx BSF optimization for NR RRM Ph5

Fields (18)

Field	Description
measObjectToRemoveList MeasObjectToRemoveList · OPTIONAL Need N	List of measurement objects to remove.
measObjectToAddModList MeasObjectToAddModList · OPTIONAL Need N	List of measurement objects to add and/or modify.
reportConfigToRemoveList ReportConfigToRemoveList · OPTIONAL Need N	List of measurement reporting configurations to remove.
reportConfigToAddModList ReportConfigToAddModList · OPTIONAL Need N	List of measurement reporting configurations to add and/or modify.
measIdToRemoveList MeasIdToRemoveList · OPTIONAL Need N	List of measurement identities to remove.
measIdToAddModList MeasIdToAddModList · OPTIONAL Need N	List of measurement identities to add and/or modify.
s-MeasureConfig CHOICE { · OPTIONAL Need M	Threshold for NR SpCell RSRP measurement controlling when the UE is required to perform measurements on non-serving cells. Choice of ssb-RSRP corresponds to cell RSRP based on SS/PBCH block and choice of csi-RSRP corresponds to cell RSRP of CSI-RS. This field is also applicable to L1 measurements configured with ltm-CSI-ResourceConfigToAddModList-r18. This field is not configured to a UE configured with event(s) related to the L2 U2N Relay UE.
ssb-RSRP RSRP-Range since v15.1.0
csi-RSRP RSRP-Range since v15.1.0
quantityConfig QuantityConfig · OPTIONAL Need M
measGapConfig MeasGapConfig · OPTIONAL Need M	Used to setup and release measurement gaps in NR.
measGapSharingConfig MeasGapSharingConfig · OPTIONAL Need M since v15.2.0	Specifies the measurement gap sharing scheme and controls setup/ release of measurement gap sharing.
interFrequencyConfig-NoGap-r16 ENUMERATED {true} · OPTIONAL Need R since v16.1.0	If the field is set to true, UE is configured to perform SSB based inter-frequency measurement without measurement gaps when the inter-frequency SSB is completely contained in the active DL BWP of the UE, as specified in TS 38.133 [14], clause 9.3. Otherwise, the SSB based inter-frequency measurement is performed within measurement gaps. In NR-DC, the field can only be configured in the measConfig associated with MCG, and when configured, it applies to all the inter-frequency measurements configured by MN and SN.
effectiveMeasWindowConfig-r18 SetupRelease {MeasWindowConfig-r18} · OPTIONAL Need M since v18.0.0	Used to setup and release effective measurement window in NR for E-UTRA measurements.
cssf-Config-r19 SEQUENCE { · OPTIONAL Need R since v19.0.0	Used to enable or disable the CSSF optimization feature.
cssf-MeasMO-List-r19 CSSF-MeasMO-List-r19 · OPTIONAL Need R since v19.0.0	Used to indicate which measurement object associated to SCell (i.e. SCC MO) is measured as defined in TS 38.133 [14]. At most one SCC MO per band is configured in this list. The SCC MO for a given band is indicated only if there are more than one SCC MO configured with SSB based measurement in the band, and neither PCell nor PSCell is configured in the band.
fbs-Config-r19 SetupRelease {FBS-Config-r19} · OPTIONAL Need M since v19.1.0	Indicates the configuration of triggering condition for L3 fast beam sweeping operation. If the measured PCell RSRP is below fbs-ThresholdP (if configured) and the measured PCell RSRQ is below fbs-ThresholdQ (if configured), UE activates L3 fast beam sweeping operation as specified in TS 38.133 [14].
speedStatePars-r19 SetupRelease {SpeedStatePars-r19} · OPTIONAL Need M since v19.1.0

MeasConfig

Definition

Candidate change requests of v19.1.0

Fields (18)

Used by (2)

Uses (15)

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