NZP-CSI-RS-Resource

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

NZP-CSI-RS-Resource 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 v19.0.0 (2025-10)

Definition

The IE NZP-CSI-RS-Resource is used to configure Non-Zero-Power (NZP) CSI-RS transmitted in the cell where the IE is included, which the UE may be configured to measure on (see TS 38.214 [19], clause 5.2.2.3.1). A change of configuration between periodic, semi-persistent or aperiodic for an NZP-CSI-RS-Resource is not supported without a release and add.

NZP-CSI-RS-Resource ::=             SEQUENCE {
    nzp-CSI-RS-ResourceId               NZP-CSI-RS-ResourceId,
    resourceMapping                     CSI-RS-ResourceMapping,
    powerControlOffset                  INTEGER (-8..15),
    powerControlOffsetSS                ENUMERATED{db-3, db0, db3, db6}                 OPTIONAL,   -- Need R
    scramblingID                        ScramblingId,
    periodicityAndOffset                CSI-ResourcePeriodicityAndOffset                OPTIONAL,   -- Cond PeriodicOrSemiPersistent
    qcl-InfoPeriodicCSI-RS              TCI-StateId                                     OPTIONAL,   -- Cond Periodic
    ...,
    [[
        subcarrierSpacing-r18               SubcarrierSpacing                               OPTIONAL,   -- Cond LTM
        absoluteFrequencyPointA-r18         ARFCN-ValueNR                                   OPTIONAL,   -- Cond LTM
        cyclicPrefix-r18                    ENUMERATED {extended}                           OPTIONAL    -- Cond LTM
    ]],
    [[
        additionalOneSlotOffset-r19         ENUMERATED{enabled}                             OPTIONAL,   -- Need R
        additionalSlotOffset-r19            INTEGER(0..7)                                   OPTIONAL    -- Need R
    ]]
}

Fields (12)

Field	Description
nzp-CSI-RS-ResourceId NZP-CSI-RS-ResourceId since v15.1.0
resourceMapping CSI-RS-ResourceMapping	OFDM symbol location(s) in a slot and subcarrier occupancy in a PRB of the CSI-RS resource.
powerControlOffset INTEGER (-8..15)	Power offset of PDSCH EPRE to NZP CSI-RS EPRE. Value in dB (see TS 38.214 [19], clauses 5.2.2.3.1 and 4.1). The UE shall ignore this field in case NZP-CSI-RS-Resources is received as part of an LTM-Candidate IE.
powerControlOffsetSS ENUMERATED{db-3, db0, db3, db6} · OPTIONAL Need R	Power offset of NZP CSI-RS EPRE to SS/PBCH block EPRE. Value in dB (see TS 38.214 [19], clause 5.2.2.3.1).
scramblingID ScramblingId	Scrambling ID (see TS 38.214 [19], clause 5.2.2.3.1).
periodicityAndOffset CSI-ResourcePeriodicityAndOffset · OPTIONAL Cond PeriodicOrSemiPersistent since v15.1.0	Periodicity and slot offset sl1 corresponds to a periodicity of 1 slot, sl2 to a periodicity of two slots, and so on. The corresponding offset is also given in number of slots (see TS 38.214 [19], clause 5.2.2.3.1). Network always configures the UE with a value for this field for periodic and semi-persistent NZP-CSI-RS-Resource (as indicated in CSI-ResourceConfig ).
qcl-InfoPeriodicCSI-RS TCI-StateId · OPTIONAL Cond Periodic since v15.1.0	For a target periodic CSI-RS, contains a reference to one TCI-State in TCI-States for providing the QCL source and QCL type. For periodic CSI-RS, the source can be SSB or another periodic-CSI-RS. Refers to the TCI-State or dl-OrJoint-TCI-State which has this value for tci-StateId and is defined in tci-StatesToAddModList or in dl-OrJointTCI-StateList in the PDSCH-Config included in the BWP-Downlink corresponding to the serving cell and to the DL BWP to which the resource belongs to (see TS 38.214 [19], clause 5.2.2.3.1). In case NZP-CSI-RS-Resources is received as part of an LTM-Candidate IE, it refers to the TCI state identifier in CandidateTCI-State and is defined in ltm-DL-OrJointTCI-StateToAddModList within the LTM-Candidate IE.
subcarrierSpacing-r18 SubcarrierSpacing · OPTIONAL Cond LTM since v18.0.0
absoluteFrequencyPointA-r18 ARFCN-ValueNR · OPTIONAL Cond LTM since v18.0.0
cyclicPrefix-r18 ENUMERATED {extended} · OPTIONAL Cond LTM since v18.0.0
additionalOneSlotOffset-r19 ENUMERATED{enabled} · OPTIONAL Need R since v19.0.0	See TS 38.214 [19], clause 5.2.2.3.1. This field is only configured for codebook typeI-SinglePanel-r19 , typeI-MultiPanel-r19, e typeII-r19 and typeII-FePortSelection-r19 .
additionalSlotOffset-r19 INTEGER(0..7) · OPTIONAL Need R since v19.0.0	See TS 38.214 [19], clause 5.2.2.3.1. The value 0 corresponds to 0 slots, value 1 corresponds to 1 slot and so on. This field is only configured for codebook typeI-SinglePanel and typeII-r16 .

NZP-CSI-RS-Resource

Definition

Fields (12)

Used by (3)

Uses (7)

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