5G NR SIB3

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SIB3 is OSI

It provides neighboring cell related information related to intra-frequency cell re-selection. Includes cells with specific re-selection parameters

SIB3 cell specific information can be provided for up to 16 intra frequency cells

SIB3 scheduling information is provided by SIB1

Transmission Details

Signalling radio bearer: Not Applicable
RLC-SAP: TM
Logical channels: BCCH
Transport Channel: DL-SCH
Physical Channel: PDSCH
Scrambling RNTI : SI-RNTI
Direction: gNB to UE

–SIB3

SIB3 contains neighboring 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 ::=                            SEQUENCE { 
    intraFreqNeighCellList
              IntraFreqNeighCellList                                          OPTIONAL,   -- Need R
    intraFreqBlackCellList
              IntraFreqBlackCellList                                          OPTIONAL,   -- Need R
    lateNonCriticalExtension            OCTET STRING OPTIONAL,
    ..., 
    [[ 
    intraFreqNeighCellList-v1610        IntraFreqNeighCellList-v1610                                    OPTIONAL,   -- Need R
    intraFreqWhiteCellList-r16
          IntraFreqWhiteCellList-r16                                      OPTIONAL,   -- Cond SharedSpectrum2
    intraFreqCAG-CellList-r16
           SEQUENCE (SIZE (1..maxPLMN)) OF IntraFreqCAG-CellListPerPLMN-r16    OPTIONAL  -- Need R
    ]] 
} 

intraFreqNeighCellList: List of intra-frequency neighbouring cells with specific cell re-selection parameters.

intraFreqBlackCellList: List of blacklisted intra-frequency neighbouring cells.

IntraFreqNeighCellList

IntraFreqNeighCellList ::=          SEQUENCE (SIZE (1..maxCellIntra)) OF IntraFreqNeighCellInfo 
IntraFreqNeighCellList-v1610::=     SEQUENCE (SIZE (1..maxCellIntra)) OF IntraFreqNeighCellInfo-v1610 
IntraFreqNeighCellInfo ::=          SEQUENCE { 
    physCellId                          PhysCellId, 
    q-OffsetCell
                        Q-OffsetRange, 
    q-RxLevMinOffsetCell
                INTEGER (1..8)                                  OPTIONAL,   -- Need R
    q-RxLevMinOffsetCellSUL
             INTEGER (1..8)                                  OPTIONAL,   -- Need R
    q-QualMinOffsetCell
                 INTEGER (1..8)                                  OPTIONAL,   -- Need R
    ... 
} 

PhysCellId: The PhysCellId identifies the physical cell identity (PCI)

q-OffsetCell: parameter “Qoffsets,n” in TS 38.304 [20]. It configures offset between serving and the neighbor cell determined by physCellId.

q-RxLevMinOffsetCell: This parameter specifies the cell specific Rx level offset in dB to Qrxlevmin. Qrxlevmin is used to indicate the required minimum received RSRP level in dBm for cell selection and re-selection in NR cell.

q-QualMinOffsetCell: This specifies the cell specific quality level offset in dB to Qqualmin.

IntraFreqBlackCellList

IntraFreqBlackCellList ::=          SEQUENCE (SIZE (1..maxCellBlack)) OF PCI-Range 
IntraFreqWhiteCellList-r16 ::=      SEQUENCE (SIZE (1..maxCellWhite)) OF PCI-Range 
IntraFreqCAG-CellListPerPLMN-r16 ::= SEQUENCE { 
    plmn-IdentityIndex-r16               INTEGER (1..maxPLMN), 
    cag-CellList-r16                     SEQUENCE (SIZE (1..maxCAG-Cell-r16)) OF PCI-Range 
} 

PCI-Range: The IE PCI-Range is used to encode either a single or a range of physical cell identities.