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