SIB6: Cell-reselection parameters INTER RAT Frequency

SIB6: Cell-reselection parameters INTER RAT Frequency

• contains information relevant only for inter-RAT cell re-selection (information about UTRA frequencies and UTRA neighbouring cells relevant for cell re-selection.
• includes cell re-selection parameters common for a frequency

Signalling radio bearer: N/A
RLC-Mode: TMLogical channel: BCCH
Direction: E‑UTRAN to UE

Important contents of SystemInformationBlockType6

carrierFreqListUTRA_FDD/TDD
    carrierFreq
    cellReselectionPriority
    threshX_High
    threshX_Low
    q_RxLevMin
    p_Max
    q_QualMin
t_ReselectionUTRA
t_ReselectionUTRA_SF
    SF_Medium
    SF_High

Field Descriptions:

carrierFreqListUTRA_FDD/TDD	Information specified for up to 16 instances of RF carriers for FDD or TDD
carrierFreq	carrier frequency helps the UE to seach
cellReselectionPriority	defines the absolute priority of the UMTS. Value 0-7, 0 is the lowest priority
threshX_High	# Threshold (in dB) used by UE for cell re-selection to a HIGHER priority UMTS frequency #  The Srxlev of the candiate cell is greater then threshX_High # Value 0 to 31 dB. Actual value= Signaled value * 2
threshX_Low	# Threshold (in dB) used by UE for cell re-selection to a LOWER priority UMTS frequency #  Cell re-selection is allowed only when Srxlev of the candiate cell is greater then threshX_Low and RSR of serving cell is less than the value of ThreshServingLow singalled within SIB3 # Value 0 to 31 dB. Actual value= Signaled value * 2
q_RxLevMin	minimum RSCP requirement for candiate UMTS cell. Value -60 to -13 dB. Actual value= Signaled value * 2 +1
p_Max	Value applicable for the intra-frequency neighbouring E-UTRA cells. If absent the UE applies the maximum power according to the UE capability
q_QualMin	# minimum Ec/Io requirement for candiate UMTS cell. Value -24 to 0 dB # applicable for FDD only
t_ReselectionUTRA	# defines the time to trigger cell re-selection # value 0 - 7 seconds
t_ReselectionUTRA_SF	# defines the time to trigger cell re-selection # value 0 - 7 seconds # Scaling factors used for Medium and High mobility # Scaling Factors value 0.25, 0.5, 0.75, 1.0. These values decrease the value of T_reselection which allows more rapid cell re-selections

SIB5: Cell-reselection parameters for INTER-Frequency

• contains information relevant only for inter-frequency cell re-selection i.e. information about other E‑UTRA frequencies and inter-frequency neighbouring cells relevant for cell re-selection
• includes cell re-selection parameters common for a frequency as well as cell specific re-selection parameters

Signalling radio bearer: N/A
RLC-Mode: TM
Logical channel: BCCH
Direction: E‑UTRAN to UE

Important contents of SystemInformationBlockType5

InterFreqCarrierFreqInfo	can be specified upto 8 carrier frequencies
dl-CarrierFreq	carrier frequency helps the UE to search the cells
q-RxLevMin	minimum RSRP value of the inter-frequency cell. Value -70 to -22 dBm. Actual value: signalled value * 2
p-Max	maximum allowed UL transmit power of the cell
t-ReselectionEUTRA	defines the time to trigger for cell reselection. Value 0 to 7 sec.
t-ReselectionEUTRA-SF	scaling factors for Medium and High mobility
threshX-High	# Threshold (in dB) used by UE for cell re-selection to a HIGHER priority #  The Srxlev of the candiate cell is greater then threshX_High # Value 0 to 31 dB. Actual value= Signaled value * 2
threshX-Low	# Threshold (in dB) used by UE for cell re-selection to a LOWER priority #  Cell re-selection is allowed only when Srxlev of the candiate cell is greater then threshX_Low and RSRP of serving cell is less than the value of ThreshServingLow singalled within SIB3 # Value 0 to 31 dB. Actual value= Signaled value * 2
allowedMeasBandwidth	defined in terms of Resouce blocks associated with a specific channel bandwidth
cellReselectionPriority	defines the Abolute priority of the frequency layer
neighCellConfig	information regarding the neighbouring cells
q-OffsetFreq	defines the RSRP measurement offset, applied to all cells on the specified RF carrier
interFreqBlackCellList	the mentioned cells are no considered for cell reselection

SIB4: Cell-reselection parameters for Neighbouring INTRA-Frequency

SIB4: Cell-reselection parameters for Neighbouring INTRA-Frequency

• contains neighbouring cell related information relevant only for intra-frequency cell re-selection
• includes cells with specific re-selection parameters as well as blacklisted cells
• All the contents of SIB4 are optional because UE's can automatically detect and complete neighbour INTRA_frequency cells

Signalling radio bearer: N/A
RLC-Mode: TM
Logical channel: BCCH
Direction: E‑UTRAN to UE

Important contents of SystemInformationBlockType4
intraFreqNeighCellList
      physCellId
      q-OffsetCell
intraFreqBlackCellList
     physCellId Range
Cellcsg_PhysCellId
     physCellId Range

Field Descriptions:

intraFreqNeighCellList [1-16 instances]	List of intra-frequency neighbouring cells with specific cell re-selection parameters
IntraFreqNeighCellInfo
physCellId	Physical CellID of the neighbour cell
q-OffsetCell	specifies the offset between the two cells. Value -24 - +24dB
intraFreqBlackCellList [1-16 instances]	List of blacklisted intra-frequency neighbouring cells. These type of cells are not considered for cell re-selection
csg_PhysCellIdRange	Set of physical cell identities reserved for CSG cells on the frequency on which this field was received. The received csg-PhysCellIdRange applies if less than 24 hours has elapsed since it was received and it was received in the same primary PLMN. This field is Optional (mandatory for CSG cell)