specviewer.org TS 38.331 ASN.1 index PDSCH-ServingCellConfig

PDSCH-ServingCellConfig

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

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

First seen v15.1.0 (2018-04) · Last changed v17.1.0 (2022-07)

Definition

The IE PDSCH-ServingCellConfig is used to configure UE specific PDSCH parameters that are common across the UE's BWPs of one serving cell.

PDSCH-ServingCellConfig ::=             SEQUENCE {
    codeBlockGroupTransmission              SetupRelease { PDSCH-CodeBlockGroupTransmission }              OPTIONAL,   -- Need M
    xOverhead                               ENUMERATED { xOh6, xOh12, xOh18 }                              OPTIONAL,   -- Need S
    nrofHARQ-ProcessesForPDSCH              ENUMERATED {n2, n4, n6, n10, n12, n16}                         OPTIONAL,   -- Need S
    pucch-Cell                              ServCellIndex                                                  OPTIONAL,   -- Cond SCellAddOnly
    ...,
    [[
        maxMIMO-Layers                          INTEGER (1..8)                                                 OPTIONAL,   -- Need M
        processingType2Enabled                  BOOLEAN                                                        OPTIONAL    -- Need M
    ]],
    [[
        pdsch-CodeBlockGroupTransmissionList-r16 SetupRelease { PDSCH-CodeBlockGroupTransmissionList-r16 }     OPTIONAL    -- Need M
    ]],
    [[
        downlinkHARQ-FeedbackDisabled-r17       SetupRelease { DownlinkHARQ-FeedbackDisabled-r17 }              OPTIONAL,   -- Need M
        nrofHARQ-ProcessesForPDSCH-v1700        ENUMERATED {n32}                                               OPTIONAL    -- Need R
    ]]
}

Candidate change requests of v17.1.0

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

Fields (9)

FieldDescription
codeBlockGroupTransmission
SetupRelease { PDSCH-CodeBlockGroupTransmission } · OPTIONAL Need M
Enables and configures code-block-group (CBG) based transmission (see TS 38.213 [13], clause 9.1.1). Network does not configure for a UE both spatial bundling of HARQ ACKs and codeBlockGroupTransmission within the same cell group. The network does not configure this field if - the SCS of at least one DL BWP configured in the cell is 480 or 960 kHz - Type-1 HARQ-ACK codebook is configured and pdsch-TimeDomainAllocationListForMultiPDSCH-r17 for this serving cell contains pdsch-AllocationList with multiple entries (multiple PDSCH) - Type-2 HARQ-ACK codebook is configured and pdsch-TimeDomainAllocationListForMultiPDSCH-r17 for any cell in the same PUCCH cell group associated with this serving cell contains pdsch-AllocationList with multiple entries (multiple PDSCH)
xOverhead
ENUMERATED { xOh6, xOh12, xOh18 } · OPTIONAL Need S
Accounts for overhead from CSI-RS, CORESET, etc. If the field is absent, the UE applies value xOh0 (see TS 38.214 [19], clause 5.1.3.2).
nrofHARQ-ProcessesForPDSCH
ENUMERATED {n2, n4, n6, n10, n12, n16} · OPTIONAL Need S
The number of HARQ processes to be used on the PDSCH of a serving cell. Value n2 corresponds to 2 HARQ processes, value n4 to 4 HARQ processes, and so on. If both nrofHARQ-ProcessesForPDSCH and nrofHARQ-ProcessesForPDSCH-v1700 are absent, the UE uses 8 HARQ processes (see TS 38.214 [19], clause 5.1).
pucch-Cell
ServCellIndex · OPTIONAL Cond SCellAddOnly
The ID of the serving cell (of the same cell group) to use for PUCCH. If the field is absent, the UE sends the HARQ feedback on the PUCCH of the SpCell of this cell group, or on this serving cell if it is a PUCCH SCell.
maxMIMO-Layers
INTEGER (1..8) · OPTIONAL Need M
since v15.4.0
Indicates the maximum number of MIMO layers to be used for PDSCH in all BWPs of this serving cell. (see TS 38.212 [17], clause 5.4.2.1).
processingType2Enabled
BOOLEAN · OPTIONAL Need M
since v15.4.0
Enables configuration of advanced processing time capability 2 for PDSCH (see 38.214 [19], clause 5.3).
pdsch-CodeBlockGroupTransmissionList-r16
SetupRelease { PDSCH-CodeBlockGroupTransmissionList-r16 } · OPTIONAL Need M
since v16.0.0
A list of configurations for up to two simultaneously constructed HARQ-ACK codebooks (see TS 38.213 [13], clause 9.3).
downlinkHARQ-FeedbackDisabled-r17
SetupRelease { DownlinkHARQ-FeedbackDisabled-r17 } · OPTIONAL Need M
since v17.0.0
Used to disable the DL HARQ feedback, sent in the uplink, per HARQ process ID. The first/leftmost bit corresponds to HARQ process ID 0, the next bit to HARQ process ID 1 and so on. Bits corresponding to HARQ process IDs that are not configured shall be ignored. The bit(s) set to one identify HARQ processes with disabled DL HARQ feedback and the bit(s) set to zero identify HARQ processes with enabled DL HARQ feedback.
nrofHARQ-ProcessesForPDSCH-v1700
ENUMERATED {n32} · OPTIONAL Need R
since v17.0.0
The number of HARQ processes to be used on the PDSCH of a serving cell. Value n2 corresponds to 2 HARQ processes, value n4 to 4 HARQ processes, and so on. If both nrofHARQ-ProcessesForPDSCH and nrofHARQ-ProcessesForPDSCH-v1700 are absent, the UE uses 8 HARQ processes (see TS 38.214 [19], clause 5.1).

Used by (1)

Uses (5)

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