5G NR MIB and SIBs Based On TS 38.331 and TS 38.304

1. 5G NR MIB and SIBs
MIB
The MIB includes the system information transmitted on BCH
Signalling radio bearer: N/A
RLC-SAP: TM
Logical channel: BCCH
Direction: Network to UE
MIB information element
MIB ::= SEQUENCE {
systemFrameNumber BIT STRING (SIZE (6)),
subCarrierSpacingCommon ENUMERATED {scs15or60, scs30or120},
ssb-SubcarrierOffset INTEGER (0..15),
dmrs-TypeA-Position ENUMERATED {pos2, pos3},
pdcch-ConfigSIB1 PDCCH-ConfigSIB1,
cellBarred ENUMERATED {barred, notBarred},
intraFreqReselection ENUMERATED {allowed, notAllowed},
spare BIT STRING (SIZE (1))
}
MIB Field Description
cellBarred : A cell a UE is not allowed to camp on.
dmrs-TypeA-Position : Position of (first) DM-RS for downlink and uplink.

2. intraFreqReselection : Controls cell selection/reselection to intra-frequency cells when the
highest ranked cell is barred, or treated as barred by the UE.
pdcch-ConfigSIB1 : Determines a common ControlResourceSet (CORESET) a common search
space and necessary PDCCH parameters. If the field ssb-SubcarrierOffset indicates that SIB1 is
not present, the field pdcch-ConfigSIB1 indicate the frequency positions where the UE may find
SS/PBCH block with SIB1 or the frequency range wherethe network does not provide SS/PBCH
block with SIB1.
ssb-SubcarrierOffset : Corresponds to kSSB which is the frequency domain offset between SSB
and the overall resource block grid in number of subcarriers.The value range of this field may be
extended by an additional most significant bit encoded within PBCH.
subCarrierSpacingCommon : Subcarrier spacing for SIB1, Msg.2/4 for initial access and
broadcast SI-messages. If the UE acquires this MIB on a carrier frequency <6GHz, the value
scs15or60 corresponds to 15 Khz and the value scs30or120 corresponds to 30 kHz. If the UE
acquires this MIB on a carrier frequency >6GHz, the value scs15or60 corresponds to 60 Khz and
the value scs30or120 corresponds to 120 kHz.
systemFrameNumber : The 6 most significant bit (MSB) of the 10-bit System Frame Number.
The 4 LSB of the SFN are conveyed in the PBCH transport block as part of channel coding.
SIB1
SIB1 contains information relevant when evaluating if a UE is allowed to access a cell and
defines the scheduling of other system information. It also contains radio resource
configuration information that is common for all UEs and barring information applied to the
unified access control.
Signalling radio bearer: N/A
RLC-SAP: TM
Logical channels: BCCH
Direction: Network to UE

3. SIB1 information element
SIB1 ::= SEQUENCE {
cellSelectionInfo SEQUENCE {
q-RxLevMin Q-RxLevMin,
q-RxLevMinOffset INTEGER (1..8) ,
q-RxLevMinSUL Q-RxLevMin ,
q-QualMin Q-QualMin ,
q-QualMinOffset INTEGER (1..8) ,
}
cellAccessRelatedInfo CellAccessRelatedInfo,
connEstFailureControl ConnEstFailureControl ,
si-SchedulingInfo SI-SchedulingInfo,
servingCellConfigCommon ServingCellConfigCommonSIB,
ims-EmergencySupport ENUMERATED {true} ,
eCallOverIMS-Support ENUMERATED {true},
ue-TimersAndConstants UE-TimersAndConstants,
uac-BarringInfo SEQUENCE {
uac-BarringForCommon UAC-BarringPerCatList,
uac-BarringPerPLMN-List UAC-BarringPerPLMN-List,
uac-BarringInfoSetList UAC-BarringInfoSetList,
uac-AccessCategory1-SelectionAssistanceInfo CHOICE {
plmnCommon UAC-AccessCategory1-SelectionAssistanceInfo,
individualPLMNList SEQUENCE (SIZE (2..maxPLMN)) OF

4. UAC-AccessCategory1-SelectionAssistanceInfo }
}
useFullResumeID ENUMERATED {true} ,
lateNonCriticalExtension OCTET STRING ,
nonCriticalExtension SEQUENCE{} ,
}
UAC-AccessCategory1-SelectionAssistanceInfo ::= ENUMERATED {a, b, c}
SIB1 field descriptions
q-QualMin : Minimum required quality level in the cell (dB). If the field is not present, the UE
applies the (default) value of negative infinity for Qqualmin.
q-QualMinOffset : Offset to the signalled Qqualmin taken into account in the Squal evaluation
as a result of a periodic search for a higher priority PLMN while camped normally in a VPLMN.If
cellSelectionInfo is not present or the field is not present, the UE applies the (default) value of 0
dB for Qqualminoffset.
q-RxLevMin : Minimum required RX level in the cell (dBm). If the UE supports SUL frequency for
this cell, Qrxlevmin is obtained from RxLevMinSUL, if present, in SIB1, SIB2 and SIB4,
additionally, if QrxlevminoffsetcellSUL is present in SIB3 and SIB4 for the concerned cell, this
cell specific offset is added to the corresponding Qrxlevmin to achieve the required minimum
RX level in the concerned cell; else Qrxlevmin is obtained from q-RxLevMin in SIB1 SIB1, SIB2
and SIB4, additionally, if Qrxlevminoffsetcell is present in SIB3 and SIB4 for the concerned cell,
this cell specific offset is added to the corresponding Qrxlevmin to achieve the required
minimum RX level in the concerned cell.
q-RxLevMinOffset : Offset to the signalled Qrxlevmin taken into account in the Srxlev
evaluation as a result of a periodic search for a higher priority PLMN while camped normally in
a VPLMN. If absent, the UE applies the (default) value of 0 dB for Qrxlevminoffset.
q-RxLevMinSUL : If the UE supports SUL frequency for this cell, Qrxlevmin is obtained from
RxLevMinSUL.
uac-BarringForCommon : Common access control parameters for each access category.
Common values are used for all PLMNs, unless overwritten by the PLMN specific configuration

5. provided in uacBarringPerPLMN-List.
useFullResumeID : Indicates which resume identifier and Resume request message should be
used. UE uses full I-RNTI and RRCResumeRequest1 if the field is present, or short I-RNTI and
RRCResumeRequest if the field is absent.
uac-AccessCategory1-SelectionAssistanceInfo : Information used to determine whether Access
Category 1 applies to the UE.
SystemInformation
The SystemInformation message is used to convey one or more System Information Blocks. All
the SIBs included are transmitted with the same periodicity.
Signalling radio bearer: N/A
RLC-SAP: TM
Logical channels: BCCH
Direction: Network to UE
SI information element
SystemInformation ::= SEQUENCE {
criticalExtensions CHOICE {
systemInformation-r15 SystemInformation-IEs,
criticalExtensionsFuture SEQUENCE {}
}
}
SystemInformation-IEs ::= SEQUENCE {

6. sib-TypeAndInfo SEQUENCE (SIZE (1..maxSIB)) OF CHOICE {
sib2 SIB2,
sib3 SIB3,
sib4 SIB4,
sib5 SIB5,
sib6 SIB6,
sib7 SIB7,
sib8 SIB8,
sib9 SIB9,
...
},
lateNonCriticalExtension OCTET STRING
nonCriticalExtension SEQUENCE {}
}
SIB2
SIB2 contains cell re-selection information common for intra-frequency, inter-frequency and/
or inter-RAT cell re-selection (i.e. applicable for more than one type of cell reselection but not
necessarily all) as well as intra-frequency cell re-selection information other than neighbouring
cell related.
SIB2 information element
SIB2 ::= SEQUENCE {
cellReselectionInfoCommon SEQUENCE {

7. nrofSS-BlocksToAverage INTEGER (2..maxNrofSS-BlocksToAverage)
absThreshSS-BlocksConsolidation ThresholdNR,
rangeToBestCell RangeToBestCell ,
q-Hyst ENUMERATED {
dB0, dB1, dB2, dB3, dB4, dB5, dB6,dB8, dB10,
dB12, dB14, dB16, dB18, dB20, dB22, dB24},
speedStateReselectionPars SEQUENCE {
mobilityStateParameters MobilityStateParameters,
q-HystSF SEQUENCE {
sf-Medium ENUMERATED {
dB-6, dB-4, dB-2, dB0},
sf-High ENUMERATED {
dB-6, dB-4, dB-2, dB0},
}
}
...
},
cellReselectionServingFreqInfo SEQUENCE {
s-NonIntraSearchP ReselectionThreshold ,
s-NonIntraSearchQ ReselectionThresholdQ ,
threshServingLowP ReselectionThreshold,
threshServingLowQ ReselectionThresholdQ,
cellReselectionPriority CellReselectionPriority,

8. cellReselectionSubPriority CellReselectionSubPriority ,
...
},
intraFreqCellReselectionInfo SEQUENCE {
q-RxLevMin Q-RxLevMin,
q-RxLevMinSUL Q-RxLevMin ,
q-QualMin Q-QualMin ,
s-IntraSearchP ReselectionThreshold,
s-IntraSearchQ R eselectionThresholdQ ,
t-ReselectionNR T-Reselection,
frequencyBandList MultiFrequencyBandListNR-SIB ,
frequencyBandListSUL MultiFrequencyBandListNR-SIB ,
p-Max P-Max ,
smtc SSB-MTC ,
ss-RSSI-Measurement SS-RSSI-Measurement,
ssb-ToMeasure SSB-ToMeasure,
deriveSSB-IndexFromCell BOOLEAN,
...
},
...
}
SIB2 field descriptions

9. absThreshSS-BlocksConsolidation : Threshold for consolidation of L1 measurements per RS
index.
cellReselectionInfoCommon : Cell re-selection information common for intra-frequency,
inter-frequency and/ or inter-RAT cell re-selection.
cellReselectionServingFreqInfo : Information common for non-intra-frequency cell re-selection
i.e. cell re-selection to inter-frequency and inter-RAT cells.
intraFreqcellReselectionInfo : Cell re-selection information common for intra-frequency cells.
deriveSSB-IndexFromCell : This field indicates whether the UE can utilize serving cell timing to
derive the index of SS block transmitted by neighbour cell. If this field is set to TRUE, the UE
assumes SFN and frame boundary alignment across cells on the serving frequency.
nrofSS-BlocksToAverage : Number of SS blocks to average for cell measurement derivation.
rangeToBestCell : This specifies the R value range which the cells whose R value is within the
range can be a candidate for the highest ranked cell.
p-Max : Value applicable for the intra-frequency neighbouring NR cells. If absent the UE applies
the maximum power.
q-Hyst : This specifies the hysteresis value for ranking criteria.Value dB1 corresponds to 1 dB,
dB2 corresponds to 2 dB and so on.
q-QualMin : This specifies the minimum required quality level in the cell in dB. applicable for
intra-frequency neighbour cells. If the field is not present, the UE applies the (default) value of
negative infinity for Qqualmin.
q-RxLevMin : This specifies the minimum required Rx level in the cell in dBm. applicable for
intra-frequency neighbour cells.
q-RxLevMinSUL : If the UE supports SUL frequency for this cell, Qrxlevmin is obtained from
RxLevMinSUL. applicable for intra-frequency neighbour cells.
s-IntraSearchP : This specifies the Srxlev threshold (in dB) for intra-frequency measurements. If
this field is not present, the UE applies the (default) value of infinity for SIntraSearchP.
s-IntraSearchQ : This specifies the Squal threshold (in dB) for intra-frequency measurements. If
the field is not present, the UE applies the (default) value of 0 dB for SIntraSearchQ.
s-NonIntraSearchP : This specifies the Srxlev threshold (in dB) for NR inter-frequency and
inter-RAT measurements. If this field is not present, the UE applies the (default) value of infinity

10. for SnonIntraSearchP.
s-NonIntraSearchQ : This specifies the Squal threshold (in dB) for NR inter-frequency and
inter-RAT measurements. If the field is not present, the UE applies the (default) value of 0 dB
for SnonIntraSearchQ.
threshServingLowP : This specifies the Srxlev threshold (in dB) used by the UE on the serving
cell when reselecting towards a lower priority RAT/ frequency.
threshServingLowQ : This specifies the Squal threshold (in dB) used by the UE on the serving
cell when reselecting towards a lower priority RAT/ frequency.
ssb-ToMeasure : The set of SS blocks to be measured within the SMTC measurement duration
(see 38.215). When the field is absent the UE measures on all SS-blocks.
smtc : Measurement timing configuration for intra-frequency measurement. If this field is
absent, the UE assumes that SSB periodicity is 5 ms for the intra-frequnecy cells.
t-ReselectionNR : This specifies the cell reselection timer value TreselectionRAT for NR. The
parameter can be set per NR frequency as specified in TS 38.331.
SIB3
SIB3 contains neighbouring cell related information relevant only for intra-frequency cell
re-selection. The IE includes cells with specific re-selection parameters as well as blacklisted
cells.
SIB3 information element
SIB3 ::= SEQUENCE {
intraFreqNeighCellList IntraFreqNeighCellList ,
intraFreqBlackCellList IntraFreqBlackCellList ,
lateNonCriticalExtension OCTET STRING ,
...

11. }
IntraFreqNeighCellList ::= SEQUENCE (SIZE (1..maxCellIntra)) OF IntraFreqNeighCellInfo,
IntraFreqNeighCellInfo ::= SEQUENCE {
physCellId PhysCellId,
q-OffsetCell Q-OffsetRange,
q-RxLevMinOffsetCell INTEGER (1..8),
q-RxLevMinOffsetCellSUL INTEGER (1..8),
q-QualMinOffsetCell INTEGER (1..8),
...
}
IntraFreqBlackCellList ::= SEQUENCE (SIZE (1..maxCellBlack)) OF PCI-Range ,
SIB3 field descriptions
intraFreqBlackCellList : List of blacklisted intra-frequency neighbouring cells.
intraFreqNeighCellList : List of intra-frequency neighbouring cells with specific cell re-selection
parameters.
q-OffsetCell : This specifies the offset between the two cells.
q-QualMinOffsetCell : This specifies the cell specific quality level offset in dB to Qqualmin.
Actual value Qqualminoffsetcell = field value [dB].
q-RxLevMinOffsetCell : This specifies the cell specific Rx level offset in dB to Qrxlevmin. Actual
value Qrxlevminoffsetcell = field value * 2 [dB].
q-RxLevMinOffsetCellSUL : If the UE supports SUL frequency for this cell, Qrxlevminoffset is
obtained from QrxlevminoffsetcellSUL. Actual value QrxlevminoffsetcellSUL = field value * 2
[dB].

12. SIB4
SIB4 contains information relevant only for inter-frequency cell re-selection i.e. information
about other NR frequencies and inter-frequency neighbouring cells relevant for cell
re-selection. The IE includes cell re-selection parameters common for a frequency as well as cell
specific re-selection parameters.
SIB4 information element
SIB4 ::= SEQUENCE {
interFreqCarrierFreqList InterFreqCarrierFreqList,
lateNonCriticalExtension OCTET STRING,
...
}
InterFreqCarrierFreqList ::= SEQUENCE (SIZE (1..maxFreq)) OF InterFreqCarrierFreqInfo
InterFreqCarrierFreqInfo ::= SEQUENCE {
dl-CarrierFreq ARFCN-ValueNR,
frequencyBandList MultiFrequencyBandListNR-SIB,
frequencyBandListSUL MultiFrequencyBandListNR-SIB,
nrofSS-BlocksToAverage INTEGER (2..maxNrofSS-BlocksToAverage),
absThreshSS-BlocksConsolidation ThresholdNR,
smtc SSB-MTC
ssbSubcarrierSpacing SubcarrierSpacing,
ssb-ToMeasure SSB-ToMeasure,
deriveSSB-IndexFromCell BOOLEAN,
ss-RSSI-Measurement SS-RSSI-Measurement,
q-RxLevMin Q-RxLevMin,

13. q-RxLevMinSUL Q-RxLevMin,
q-QualMin Q-QualMin,
p-Max P-Max,
t-ReselectionNR T-Reselection,
t-ReselectionNR-SF SpeedStateScaleFactors,
threshX-HighP ReselectionThreshold,
threshX-LowP ReselectionThreshold,
threshX-Q SEQUENCE {
threshX-HighQ ReselectionThresholdQ,
threshX-LowQ ReselectionThresholdQ,
}
cellReselectionPriority CellReselectionPriority,
cellReselectionSubPriority CellReselectionSubPriority,
q-OffsetFreq Q-OffsetRange DEFAULT dB0,
interFreqNeighCellList InterFreqNeighCellList, interFreqBlackCellList
InterFreqBlackCellList,
...
}
InterFreqNeighCellList ::= SEQUENCE (SIZE (1..maxCellInter)) OF InterFreqNeighCellInfo
InterFreqNeighCellInfo ::= SEQUENCE {
physCellId PhysCellId,
q-OffsetCell Q-OffsetRange,
q-RxLevMinOffsetCell INTEGER (1..8),
q-RxLevMinOffsetCellSUL INTEGER (1..8),

14. q-QualMinOffsetCell INTEGER (1..8) ,
...
}
InterFreqBlackCellList ::= SEQUENCE (SIZE (1..maxCellBlack)) OF PCI-Range
SIB4 field descriptions
absThreshSS-BlocksConsolidation : Threshold for consolidation of L1 measurements per RS
index.
deriveSSB-IndexFromCell : This field indicates whether the UE may use the timing of any
detected cell on that frequency to derive the SSB index of all neighbour cells on that frequency.
If this field is set to TRUE, the UE assumes SFN and frame boundary alignment across cells on
the neighbor frequency as specified in 38.133.
interFreqBlackCellList : List of blacklisted inter-frequency neighbouring cells.
interFreqCarrierFreqList : List of neighbouring carrier frequencies and frequency specific cell
re-selection information.
interFreqNeighCellList : interFreqNeighCellList List of inter-frequency neighbouring cells with
specific cell re-selection parameters.
nrofSS-BlocksToAverage : Number of SS blocks to average for cell measurement derivation.
p-Max : Value applicable for the neighbouring NR cells on this carrier frequency. If absent the
UE applies the maximum power according to TS 38.101.
q-OffsetCell : This specifies the offset between the two cells.
q-OffsetFreq : Frequency specific offset for equal priority NR frequencies.
q-QualMin : This specifies the minimum required quality level in the cell in dB. applicable for
intra-frequency neighbour cells. If the field is not present, the UE applies the (default) value of
negative infinity for Qqualmin.
q-QualMinOffsetCell : This specifies the cell specific quality level offset in dB to Qqualmin.
Actual value Qqualminoffsetcell = field value [dB].
q-RxLevMinOffsetCel : This specifies the cell specific Rx level offset in dB to Qrxlevmin. Actual

15. value Qrxlevminoffsetcell = field value * 2 [dB].
q-RxLevMinOffsetCellSUL : If the UE supports SUL frequency for this cell, Qrxlevminoffset is
obtained from QrxlevminoffsetcellSUL. Actual value QrxlevminoffsetcellSUL = field value * 2
[dB].
smtc : Measurement timing configuration for inter-frequency measurement. If this field is
absent, the UE assumes that SSB periodicity is 5 ms in this frequency.
ssb-ToMeasure : The set of SS blocks to be measured within the SMTC measurement duration
(see 38.215). When the field is absent the UE measures on all SS-blocks
ssbSubcarrierSpacing : Subcarrier spacing of SSB. Only the values 15 or 30 (<6GHz), 120 kHz or
240 kHz (>6GHz) are applicable.
threshX-HighP : This specifies the Srxlev threshold (in dB) used by the UE when reselecting
towards a higher priority RAT/ frequency than the current serving frequency. Each frequency of
NR and E-UTRAN might have a specific threshold.
threshX-HighQ : This specifies the Squal threshold (in dB) used by the UE when reselecting
towards a higher priority RAT/ frequency than the current serving frequency. Each frequency of
NR and E-UTRAN might have a specific threshold.
threshX-LowP : This specifies the Srxlev threshold (in dB) used by the UE when reselecting
towards a lower priority RAT/ frequency than the current serving frequency. Each frequency of
NR and E-UTRAN might have a specific threshold.
threshX-LowQ : This specifies the Squal threshold (in dB) used by the UE when reselecting
towards a lower priority RAT/ frequency than the current serving frequency. Each frequency of
NR and E-UTRAN might have a specific threshold.
t-ReselectionNR : This specifies the cell reselection timer value TreselectionRAT for NR. The
parameter can be set per NR frequency as specified in TS 38.331.
t-ReselectionNR-SF : Parameter "Speed dependent ScalingFactor for TreselectionNR". If the
field is not present, the UE behaviour is specified in TS 38.304.
Below Items not Included In SIB4 :
Speed dependent ScalingFactor for TreselectionNR : This specifies scaling factor for
TreselectionNR in sf-High for High-mobility state and sf-Medium for Medium-mobility state.

16. SIB5
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 reselection. The IE includes
cell re-selection parameters common for a frequency.
SIB5 information element
SIB5 ::= SEQUENCE {
carrierFreqListEUTRA CarrierFreqListEUTRA,
t-ReselectionEUTRA T-Reselection,
t-ReselectionEUTRA-SF SpeedStateScaleFactors,
lateNonCriticalExtension OCTET STRING ,
...
}
CarrierFreqListEUTRA ::= SEQUENCE (SIZE (1..maxEUTRA-Carrier)) OF CarrierFreqEUTRA
CarrierFreqEUTRA ::= SEQUENCE {
carrierFreq ARFCN-ValueEUTRA,
eutra-multiBandInfoList EUTRA-MultiBandInfoList,
eutra-FreqNeighCellList EUTRA-FreqNeighCellList,
eutra-BlackCellList EUTRA-FreqBlackCellList,
allowedMeasBandwidth EUTRA-AllowedMeasBandwidth,
presenceAntennaPort1 EUTRA-PresenceAntennaPort1,
cellReselectionPriority CellReselectionPriority,
cellReselectionSubPriority CellReselectionSubPriority,
threshX-High ReselectionThreshold,
threshX-Low ReselectionThreshold,

17. q-RxLevMin INTEGER (-70..-22),
q-QualMin INTEGER (-34..-3),
p-MaxEUTRA INTEGER (-30..33),
threshX-Q SEQUENCE {
threshX-HighQ ReselectionThresholdQ,
threshX-LowQ ReselectionThresholdQ
}
}
EUTRA-FreqBlackCellList ::= SEQUENCE (SIZE (1..maxEUTRA-CellBlack)) OF EUTRA-PhysCellIdRange
EUTRA-FreqNeighCellList ::= SEQUENCE (SIZE (1..maxCellEUTRA)) OF EUTRA-FreqNeighCellInfo
EUTRA-FreqNeighCellInfo ::= SEQUENCE {
physCellId EUTRA-PhysCellId,
q-OffsetCell EUTRA-Q-OffsetRange,
q-RxLevMinOffsetCell INTEGER (1..8)
q-QualMinOffsetCell INTEGER (1..8)
}
SIB5 field descriptions
carrierFreqListEUTRA : List of carrier frequencies of EUTRA.
eutra-BlackCellList : List of blacklisted EUTRA neighbouring cells.
eutra-multiBandInfoList : Indicates the list of frequency bands in addition to the band
represented by carrierFreq for which cell reselection parameters are common, and a list of
additional Pmax and additionalSpectrumEmission values, as defined in TS 36.101, for the
frequency bands in eutra-multiBandInfoList.
p-MaxEUTRA : The maximum allowed transmission power on the (uplink) carrier frequency In
dBm.

18. q-QualMin : Minimum required quality level in the cell (dB). Additionally, if
Qqualminoffsetcell is signalled for the concerned cell, this cell specific offset
is added to achieve the required minimum quality level in the concerned cell. Actual value
Qqualmin = field value [dB].
q-QualMinOffsetCell : Offset to the signalled Qqualmin taken into account in the Squal
evaluation as a result of a periodic search for a higher priority PLMN
while camped normally in a VPLMN.Actual value Qqualminoffsetcell = field value [dB].
q-RxLevMin : This specifies the minimum required Rx level in the cell in dBm. applicable for
intra-frequency neighbour cells.Actual value Qrxlevmin = field value * 2 [dBm].
q-RxLevMinOffsetCell : This specifies the cell specific Rx level offset in dB to Qrxlevmin. Actual
value Qrxlevminoffsetcell = field value * 2 [dB].
t-ReselectionEUTRA : This specifies the cell reselection timer value TreselectionRAT for
E-UTRAN.
threshX-High: This specifies the Srxlev threshold (in dB) used by the UE when reselecting
towards a higher priority RAT/ frequency than the current serving frequency. Each frequency of
NR and E-UTRAN might have a specific threshold.
threshX-HighQ : This specifies the Squal threshold (in dB) used by the UE when reselecting
towards a higher priority RAT/ frequency than the current serving frequency. Each frequency of
NR and E-UTRAN might have a specific threshold.
threshX-Low : This specifies the Srxlev threshold (in dB) used by the UE when reselecting
towards a lower priority RAT/ frequency than the current serving frequency. Each frequency of
NR and E-UTRAN might have a specific threshold.
threshX-LowQ : This specifies the Squal threshold (in dB) used by the UE when reselecting
towards a lower priority RAT/ frequency than the current serving frequency. Each frequency of
NR and E-UTRAN might have a specific threshold.
t-ReselectionEUTRA-SF : Parameter "Speed dependent ScalingFactor for TreselectionEUTRA". If
the field is not present, the UE behaviour is specified in TS 38.304 [4]
Below Items not Included In SIB5:
Speed dependent ScalingFactor for TreselectionEUTRA : This specifies scaling factor for

19. TreselectionEUTRA in sf-High for High-mobility state and sf-Medium for Mediummobility state.
SIB6
SIB6 contains an ETWS primary notification.
SIB6 information element
SIB6 ::= SEQUENCE {
messageIdentifier BIT STRING (SIZE (16)),
serialNumber BIT STRING (SIZE (16)),
warningType OCTET STRING (SIZE (2)),
lateNonCriticalExtension OCTET STRING ,
...
}
SIB6 field descriptions
messageIdentifier : Identifies the source and type of ETWS notification.
serialNumber : Identifies variations of an ETWS notification.
warningType : Identifies the warning type of the ETWS primary notification and provides
information on emergency user alert and UE popup.
SIB7
SIB7 contains an ETWS secondary notification.

20. SIB7 information element
SIB7 ::= SEQUENCE {
messageIdentifier BIT STRING (SIZE (16)),
serialNumber BIT STRING (SIZE (16)),
warningMessageSegmentType ENUMERATED {notLastSegment, lastSegment},
warningMessageSegmentNumber INTEGER (0..63),
warningMessageSegment OCTET STRING,
dataCodingScheme OCTET STRING (SIZE (1)),
lateNonCriticalExtension OCTET STRING,
...
}
SIB7 field descriptions
dataCodingScheme : Identifies the alphabet/coding and the language applied variations of an
ETWS notification.
messageIdentifier : Identifies the source and type of ETWS notification.
serialNumber : Identifies variations of an ETWS notification.
warningMessageSegment : Carries a segment of the Warning Message Contents IE.
warningMessageSegmentNumber : Segment number of the ETWS warning message segment
contained in the SIB. A segment number of zero corresponds to the first segment, one
corresponds to the second segment, and so on.
warningMessageSegmentType : Indicates whether the included ETWS warning message
segment is the last segment or not.
SIB8
SIB8 contains a CMAS notification.

21. SIB8 information element
SIB8 ::= SEQUENCE {
messageIdentifier BIT STRING (SIZE (16)),
serialNumber BIT STRING (SIZE (16)),
warningMessageSegmentType ENUMERATED {notLastSegment, lastSegment},
warningMessageSegmentNumber INTEGER (0..63),
warningMessageSegment OCTET STRING,
dataCodingScheme OCTET STRING (SIZE (1)),
warningAreaCoordinatesSegment OCTET STRING,
lateNonCriticalExtension OCTET STRING ,
...
}
SIB8 field descriptions
dataCodingScheme : Identifies the alphabet/coding and the language applied variations of a
CMAS notification.
messageIdentifier : Identifies the source and type of CMAS notification.
serialNumber : Identifies variations of a CMAS notification.
warningAreaCoordinatesSegment : Carries a segment of the geographical area where the
CMAS warning message is valid. The first octet of the first warningAreaCoordinatesSegment is
equivalent to the first octet of Warning Area Coordinates IE defined in and encoded according
to TS 23.041 and so on.
warningMessageSegment : Carries a segment of the Warning Message Contents IE.
warningMessageSegmentNumber : Segment number of the CMAS warning message segment
contained in the SIB. A segment number of zero corresponds to the first segment, one

22. corresponds to the second segment, and so on.
warningMessageSegmentType : Indicates whether the included CMAS warning message
segment is the last segment or not.
SIB9
SIB9 contains information related to GPS time and Coordinated Universal Time (UTC). The UE
may use the parameters provided in this system information block to obtain the UTC, the GPS
and the local time.
SIB9 information element
SIB9 ::= SEQUENCE {
timeInfo SEQUENCE {
timeInfoUTC INTEGER (0..549755813887),
dayLightSavingTime BIT STRING (SIZE (2)),
leapSeconds INTEGER (-127..128),
localTimeOffset INTEGER (-63..64)
}
lateNonCriticalExtension OCTET STRING,
...
}
SIB9 field descriptions
dayLightSavingTime : Indicates if and how daylight-saving time (DST) is applied to obtain the
local time.
leapSeconds : Number of leap seconds offset between GPS Time and UTC. UTC and GPS time
are related i.e. GPS time -leapSeconds = UTC time.

23. localTimeOffset : Offset between UTC and local time in units of 15 minutes. Actual value = field
value * 15 minutes. Local time of the day is calculated as UTC time + localTimeOffset.
timeInfoUTC : Coordinated Universal Time corresponding to the SFN boundary at or
immediately after the ending boundary of the SI-window in which SIB9 is transmitted. The field
counts the number of UTC seconds in 10 ms units since 00:00:00 on Gregorian calendar date 1
January, 1900 (midnight between Sunday, December 31, 1899 and Monday, January 1, 1900).
Refrences:
1- TS 38.331 (V 15.4.0)
2- TS 38.304 (V 15.2.0)
Iman Mohammadi
May 2019
E-Mail : iman.mohammadi.telecom@gmail.com
LinkedIn: https://www.linkedin.com/in/iman-mohammadi-886b89151
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