Monday, 9 June 2014

System Information Block -6 in LTE (SIB-6)

 Ø  Contains information relevant only for inter-RAT cell re-selection (information about UTRA frequencies and UTRA neighboring cells relevant for cell re-selection.
 Ø  Includes cell re-selection parameters common for a frequency


Information’s:

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 candidate cell is greater than 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 candidate cell is greater than 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 candidate UMTS cell. Value -60 to -13 dB. Actual value= Signaled value * 2 +1
p_Max
Value applicable for the intra-frequency neighboring E-UTRA cells. If absent the UE applies the maximum power according to the UE capability
q_QualMin
# Minimum Ec/Io requirement for candidate 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

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