System Information Block Type 5 or with abbreviated version SIB5 contains EUTRAN frequency related information and relevant only for inter-frequency cell re-selection. The message includes frequencies with specific re-selection parameters as well as blacklisted cells. SIB5 is transmitted from the network to UE through BCCH -> DL-SCH -> PDSCH channels.
Here the list of carried information from the network to UE through SIB5:
Inter Freq Carrier Freq List: contains information about inter-frequency cell re-selection within E-UTRAN.
dl-Carrier Freq: indicates target frequency EARFCN for inter-frequency cell re-selection.
q-RxLev Min: required minimum received RSRP level on this E-UTRA frequency carrier. Actual value in dBm is obtained by multiplying by 2.
p-Max: this parameter is used to limit the allowed UE uplink transmission power on this carrier frequency.
t-Reselection EUTRA: cell reselection timer for inter-frequency cell reselection to this E-UTRA frequency carrier.
sf-Medium: specifies scaling factor for t-Reselection EUTRA for inter-frequency reselection to this frequency carrier in Medium-mobility state. Value oDot25 corresponds to 0.25, oDot5 corresponds to 0.5 etc.
sf-High: specifies scaling factor for t-Reselection EUTRA for inter-frequency reselection to this frequency carrier in High-mobility state. Value oDot25 corresponds to 0.25, oDot5 corresponds to 0.5 etc.
threshX-High: inter frequency high priority threshold, the threshold used when reselecting from a lower priority LTE frequency to higher priority LTE frequency. Actual value in dB is obtained by multiplying by 2.
threshX-Low: inter frequency lower priority threshold, the threshold used when reselecting from a higher priority LTE frequency to lower priority LTE frequency. Actual value in dB is obtained by multiplying by 2.
Allowed Meas Bandwidth: indicates the measurement bandwidth of the inter-frequency neighboring cell on the frequency. A cell bandwidth is also expressed in units of physical resource blocks. Cell bandwidths 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz correspond to 6 RBs, 15 RBs, 25 RBs, 50 RBs, 75 RBs, and 100 RBs.
Presence Antenna Port1: indicates whether all the inter-frequency neighboring cells are configured with at least two antenna ports:
– TRUE when all the inter-frequency neighboring cells are configured with at least two antenna ports.
– FALSE when one of the inter-frequency neighboring cells is configured with only one antenna port.
Cell Reselection Priority: inter-frequency cell re-selection priority indicates priority of the neighboring E-UTRAN frequency. The value 0 indicates the lowest priority.
Neigh Cell Config: provides the information related to MBSFN and TDD UL/DL configuration of inter-frequency neighbor cells:
– “00” inter-frequency neighboring cells have the same MBSFN sub-frame configuration as the serving cell.
– “01” none of the inter-frequency neighboring cells is configured with MBSFN sub-frames.
– “10” MBSFN sub-frame configurations of all inter-frequency neighboring cells are ame as the serving cell.
– “11” some inter-frequency neighboring cells have different UL-DL configurations from serving TDD cell.
q-Offset Freq: offset applicable between serving and this frequency carrier. Actual value in dBm is obtained by multiplying by 2. A larger value of this parameter results in a lower probability of reselection to cells on the neighboring E-UTRAN frequency. A smaller value of this parameter leads to the opposite effects.
Inter Freq Black Cell List: consists of the parameters related to a blacklisted inter-frequency cell.
Phys Cell Id: starting physical cell ID of the inter-frequency blacklisted cell.
Phys Cell Id Range: physical cell ID range of the inter-frequency blacklisted cell.
SIB5 carried information:
Example for SIB5, taken from drive-test tool:
interFreqCarrierFreqList
InterFreqCarrierFreqList :
[0 ] :
dl-CarrierFreq : 1524
q-RxLevMin : -60
p-Max : 23
t-ReselectionEUTRA : 1
threshX-High : 11
threshX-Low : 2
allowedMeasBandwidth : mbw75
presenceAntennaPort1 : False
cellReselectionPriority : 5
neighCellConfig
Binary string (Bin) : 01
[0 ] : 0
[1 ] : 1
[1 ] :
dl-CarrierFreq : 1475
q-RxLevMin : -60
p-Max : 23
t-ReselectionEUTRA : 1
threshX-High : 11
threshX-Low : 11
allowedMeasBandwidth : mbw50
presenceAntennaPort1 : False
cellReselectionPriority : 3
neighCellConfig
Binary string (Bin) : 01
[0 ] : 0
[1 ] : 1
* Note: there are some parameters which might not be seen in the message list from drive-test tool, so it means this parameter was not configured in the network by the engineers.