specviewer.org TS 38.331 ASN.1 index SRS-PosTx-Hopping-r18

SRS-PosTx-Hopping (SRS-PosTx-Hopping-r18)

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

SRS-PosTx-Hopping-r18 is an RRC information element of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.

First seen v18.0.0 (2024-01) · Last changed v18.2.0 (2024-07)

Definition

The IE SRS-PosTx-Hopping specifies the uplink Tx frequency hopping configuration for SRS for positioning transmission.

SRS-PosTx-Hopping-r18 ::=                       SEQUENCE {
    srs-PosConfig-r18                               SRS-PosConfig-r17,
    bwp-r18                                         BWP                                                              OPTIONAL, -- Need R
    inactivePosSRS-TimeAlignmentTimer-r18           TimeAlignmentTimer                                               OPTIONAL, -- Need M
    inactivePosSRS-RSRP-ChangeThreshold-r18         RSRP-ChangeThreshold-r17                                         OPTIONAL, -- Need M
    srs-PosUplinkTransmissionWindowConfig-r18       SetupRelease { SRS-PosUplinkTransmissionWindowConfig-r18 }       OPTIONAL, -- Need M
    ...
}

Fields (5)

FieldDescription
srs-PosConfig-r18
SRS-PosConfig-r17
Provides the SRS configuration to be used for frequency hopping.
bwp-r18
BWP · OPTIONAL Need R
For RRC_CONNECTED state, it indicates the frequency region outside of active BWP for SRS for positioning frequency hopping. For RRC_INACTIVE state, it indicates the BWP configuration for SRS for positioning frequency hopping. The network always configures this field when srs-PosTx-Hopping is configured.
inactivePosSRS-TimeAlignmentTimer-r18
TimeAlignmentTimer · OPTIONAL Need M
since v18.2.0
TAT value for SRS for positioning transmission during RRC_INACTIVE state as specified in TS 38.321 [3]. The network always configures this field when srs-PosTx-Hopping is configured.
inactivePosSRS-RSRP-ChangeThreshold-r18
RSRP-ChangeThreshold-r17 · OPTIONAL Need M
since v18.2.0
RSRP threshold for the increase/decrease of RSRP for time alignment validation as specified in TS 38.321 [3].
srs-PosUplinkTransmissionWindowConfig-r18
SetupRelease { SRS-PosUplinkTransmissionWindowConfig-r18 } · OPTIONAL Need M
Used to setup and release the configuration of the periodic uplink transmission window for SRS for positioning with Tx frequency hopping in RRC_CONNECTED state.

Used by (2)

Uses (6)

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