SIB5

RRC IE · TS 38.331 v19.4.0 (2026-09) · clause 6.3.1

SIB5 is an RRC information element of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.

First seen v15.3.0 (2018-09) · Last changed v18.0.0 (2024-01)

Definition

SIB5 contains information relevant only for inter-RAT cell re-selection i.e. information about E-UTRA frequencies and E-UTRAs neighbouring cells relevant for cell re-selection. The IE includes cell re-selection parameters common for a frequency.

SIB5 ::=                            SEQUENCE {
    carrierFreqListEUTRA                CarrierFreqListEUTRA                        OPTIONAL,       -- Need R
    t-ReselectionEUTRA                  T-Reselection,
    t-ReselectionEUTRA-SF               SpeedStateScaleFactors                      OPTIONAL,       -- Need S
    lateNonCriticalExtension            OCTET STRING                                OPTIONAL,
    ...,
    [[
        carrierFreqListEUTRA-v1610      CarrierFreqListEUTRA-v1610                      OPTIONAL        -- Need R
    ]],
    [[
        carrierFreqListEUTRA-v1700      CarrierFreqListEUTRA-v1700                      OPTIONAL,       -- Need R
        idleModeMeasVoiceFallback-r17   ENUMERATED{true}                                OPTIONAL        -- Need R
    ]],
    [[
        carrierFreqListEUTRA-v1800      CarrierFreqListEUTRA-v1800                      OPTIONAL        -- Need R
    ]]
}

Fields (8)

Field	Description
carrierFreqListEUTRA CarrierFreqListEUTRA · OPTIONAL Need R	List of carrier frequencies of E-UTRA. If the carrierFreqListEUTRA-v1610/ carrierFreqListEUTRA-v1700/ carrierFreqListEUTRA-v1800 is present, it shall contain the same number of entries, listed in the same order as in the carrierFreqListEUTRA (without suffix).
t-ReselectionEUTRA T-Reselection	Parameter "Treselection EUTRA " in TS 38.304 [20].
t-ReselectionEUTRA-SF SpeedStateScaleFactors · OPTIONAL Need S	Parameter "Speed dependent ScalingFactor for Treselection EUTRA " in TS 38.304 [20]. If the field is absent, the UE behaviour is specified in TS 38.304 [20].
lateNonCriticalExtension OCTET STRING · OPTIONAL
carrierFreqListEUTRA-v1610 CarrierFreqListEUTRA-v1610 · OPTIONAL Need R since v16.1.0	List of carrier frequencies of E-UTRA. If the carrierFreqListEUTRA-v1610/ carrierFreqListEUTRA-v1700/ carrierFreqListEUTRA-v1800 is present, it shall contain the same number of entries, listed in the same order as in the carrierFreqListEUTRA (without suffix).
carrierFreqListEUTRA-v1700 CarrierFreqListEUTRA-v1700 · OPTIONAL Need R since v17.0.0	List of carrier frequencies of E-UTRA. If the carrierFreqListEUTRA-v1610/ carrierFreqListEUTRA-v1700/ carrierFreqListEUTRA-v1800 is present, it shall contain the same number of entries, listed in the same order as in the carrierFreqListEUTRA (without suffix).
idleModeMeasVoiceFallback-r17 ENUMERATED{true} · OPTIONAL Need R since v17.1.0	Indicates whether E-UTRA idle/inactive measurements and reporting for EPS fallback can be used.
carrierFreqListEUTRA-v1800 CarrierFreqListEUTRA-v1800 · OPTIONAL Need R since v18.0.0	List of carrier frequencies of E-UTRA. If the carrierFreqListEUTRA-v1610/ carrierFreqListEUTRA-v1700/ carrierFreqListEUTRA-v1800 is present, it shall contain the same number of entries, listed in the same order as in the carrierFreqListEUTRA (without suffix).

Used by (1)

SystemInformation-IEs

SIB5

Definition

Fields (8)

Used by (1)

Uses (6)

In the viewer