All about SIB's in LTE SIBs and their JOBS: SIB-1
Cell access related parameters and scheduling of other SIBs
SIB-2
Common and shared channel configuration, RACH related configuration are present
SIB-3
Parameters required for intra-frequency, inter-frequency and I-RAT cell re-selections
SIB-4
Information regarding INTRA-frequency neighboring cells (E-UTRA)
SIB-5
Information regarding INTER-frequency neighboring cells (E-UTRA)
SIB-6
Information for re-selection to INTER-RAT (UTRAN cells)
SIB-7
Information for re-selection to INTER-RAT (GERAN cells)
SIB-8
Information for re-selection to INTER-RAT (CDMA2000)
SIB-9
Information related to Home eNodeB (FEMTOCELL)
SIB-10
ETWS (Earthquake and Tsunami Warning System) information (Primary notification)
SIB-11
ETWS (Earthquake and Tsunami Warning System) information (Secondary notification)
SIB-12
Commercial Mobile Alert Service (CMAS) information.
SIB-13
Contains the information required to acquire the MBMS control information associated with one or more MBSFN areas.
Query_1: Why SIBs are needed? SIBs carry relevant information for the UE, which helps UE to access a cell, perform cell re-selection, information related to INTRA-frequency, INTER-frequency and INTER-RAT cell selections. Query_2: How many types of SIBs are there? In LTE there are 13 types of SIBs. Each SIB has its own job to do, which means, they are meant to carry information which are related to perform their assigned job. Query_3: On which channels SIBs are transmitted? All SIBs are transmitted on BCCH->DL-SCH->PDSCH. Query_4: Minimum of how many SIBs are required for the UE to initiate Attach procedure? In LTE, for a UE to access the eNB, at the most minimum 2 SIBs are required (SIB1 and SIB2). Information regarding SIB2-SIB13 are carried in SI messages and are included in schedulingInfoList which is part of SIB1.
Scheduling of SIBs: SIB1 uses a fixed schedule with a periodicity of 80 ms and repetitions made within 80 ms. The first transmission of SIB1 is scheduled in subframe #5 of radio frames for which the SFN mod 8 = 0, and Repetitions are scheduled in subframe #5 of all other radio frames for which SFN mod 2 = 0. Scheduling of other SIB's i.e. SIB-2 to SIB-9 is defined by si-Periodicity and si-WindowLength. Both these IEs are explained below. For the rest of the SIBs, Paging is received by UE in RRC_IDLE or RRC_CONNECTED mode for notification of an in-coming SI message. Scenarios where UE acquire SIBs: UE will initiate the SIB acquisition procedure in any of the following criteria's:
UE is powered on (selecting a cell) Cell re-selection
After HO completion After entering E-UTRAN from another RAT coming out of OUT OF COVERAGE situation receiving a notification that SYSTEM INFORMATION has changed receiving an indication about the presence of ETWS (Primary/Secondary), CMAS notification receiving a request from CDMA 2000 upper layers exceeding the maximum validity duration of SIBs HOW and WHEN UE start acquiring SIBs (other than SIB1): There are two IE's which help the UE to calculate when to read SI messages. They are: a. schedulingInfoList b. si-WindowLengthd schedulingInfoList informs the UE regarding the presence of SIB type; other than SIB1. It carriers two more parameters: i. si_Periodicity ii. sib_MappingInfo
si_Periodicity tells about the period in terms of radio frames which helps the UE to read the required SIB. The value of this parameter is used for calculating the Radio frame where SI will be received. sib_MappingInfo carries the type of SIBs mapped si-WindowLength specifies that a SIB should be transmitted somewhere within the specified window length. Value is in ms. This window starts at the starting sub-frame of the mentioned si_periodicity. SIBs can be received in any of the sub-frame as mentioned in the WindowLength.
Example: SIB1 is received by UE with the following information: schedulingInfoList[0]
SchedulingInfo SchedulingInfosi_Periodicity_rf16 SIB_TypeSIB_Type_sibType3 schedulingInfoList[1] SchedulingInfo si_Periodicity SchedulingInfosi_Periodicity_rf32 sib_MappingInfo[0] SIB_TypeSIB_Type_sibType4 schedulingInfoList[2] SchedulingInfo si_Periodicity SchedulingInfosi_Periodicity_rf64 sib_MappingInfo[0] SIB_TypeSIB_Type_sibType5 si_WindowLength ms20 (To look for the complete IE contents and explanation of SIB1 click here) si_Periodicity sib_MappingInfo[0]
The above table states the following: The first element of schedulingInfoList contains sib3 The seond element of schedulingInfoList contains sib4 The third element of schedulingInfoList contains sib5
Periodicity= 16 radio frames or 160ms Periodicity= 32 radio frames or 320ms Periodicity= 64 radio frames 640ms
Window length= 20ms Window length= 20ms Window length= 20ms
Now, UE needs two information to read SI. a. One is on which which Radio frame UE will receive the SIB. To determine which Radio frame, the formula is: SFN mod T = FLOOR(x/10) b. on which sub-frame will the SI window start. To determine the start of the SI window at sub-frame, the formula is: a = x mod 10 Query: How to determine the value of x? x = (n – 1)*w where, x n w T
Integer value a number which corrosponds to the order of entry in schedulingInfoList.For sib3 n is 1, for sib4 n is 2 and for sib5 n is 3 si-WindowLength si-Periodicity of the concerned SI message
Let's start calulating the Radio frame and SI starting sub frame for SIB3, SIB4 and SIB5 Subframe from which the SI Window starts x = (n – 1)*w For SIB-3 x=(1-1)*20 x=0
a = x mod 10 a= 0 mod 10 a=0
The SI Window will start at sub frame 0 of the Radio frame where SI will be acquired
x = (n – 1)*w For SIB-4 x=(2 - 1)*20 x=20
a = x mod 10 a= 20 mod 10 a=0
The SI Window will start at sub frame 0 of the Radio frame where SI will be acquired
x = (n – 1)*w For SIB-5 x=(3 - 1)*20 x=40
a = x mod 10 a= 40 mod 10 a=0
The SI Window will start at sub frame 0 of the Radio frame where SI will be acquired
Radio frame on which the UE will acquire designated SIB Whenever SFN mod 16 will be 0. UE is For SIB-3SFN mod T = FLOOR(x/10)
SFN mod 16 = FLOOR (0/10)
expecting SIB3 and it will start
SFN mod 16 = 0
looking from sub frame 0 till the end of the mentioned si-WindowLength
Whenever SFN mod 32 will be 2. UE is For SIB-4SFN mod T = FLOOR(x/10)
SFN mod 32 = FLOOR (20/10)
expecting SIB4 and it will start looking
SFN mod 32 = 2
at sub frame 0 till the end of the mentioned si-WindowLength Whenever SFN mod 64 will be 4. UE is
For SIB-5SFN mod T = FLOOR(x/10)
SFN mod 64 = FLOOR (40/10)
expecting SIB5 and it will start looking
SFN mod 64 = 4
at sub frame 0 till the end of the mentioned si-WindowLength
SIBs and their JOBS: (click on each of the SIB to know more about them) SIB-1
Cell access related parameters and scheduling of other SIBs
SIB-2
Common and shared channel configuration, RACH related configuration are present
SIB-3
Parameters required for intra-frequency, inter-frequency and I-RAT cell re-selections
SIB-4
Information regarding INTRA-frequency neighboring cells (E-UTRA)
SIB-5
Information regarding INTER-frequency neighboring cells (E-UTRA)
SIB-6
Information for re-selection to INTER-RAT (UTRAN cells)
SIB-7
Information for re-selection to INTER-RAT (GERAN cells)
SIB-8
Information for re-selection to INTER-RAT (CDMA2000)
SIB-9
Information related to Home eNodeB (FEMTOCELL)
SIB-10
ETWS (Earthquake and Tsunami Warning System) information (Primary notification)
SIB-11
ETWS (Earthquake and Tsunami Warning System) information (Secondary notification)
SIB-12
Commercial Mobile Alert Service (CMAS) information.
SIB-13
Contains the information required to acquire the MBMS control information associated with one or more MBSFN areas.
SIB1 in LTE The first SIB: SIB1 SIB1 contents assist the UE when it is evaluating cell access and also defines the scheduling of other system information. Signalling radio bearer: N/A RLC-Mode: TM Logical channel: BCCH Direction: E-UTRAN to UE
SIB1 is broadcasted at every 80 ms and is repeated are mabe within 80ms
The first transmission is made at SubFrame 5 for which SFN mod 8 = 0
Repetitions are scheduled in SubFRame 5 for which SFN mod 2 = 0
Important contents of SystemInformationBlockType1 cellAccessRelatedInfo PLMN_Identity mcc[0] mcc[1] mcc[2] mnc[0] mnc[1] cellReservedForOperatorUse trackingAreaCode cellIdentity cellBarred intraFreqReselection cellSelectionInfo q_RxLevMin q_RxLevMinOffset p_Max freqBandIndicator schedulingInfoList[0] si_Periodicity sib_MappingInfo[0] si_WindowLength systemInfoValueTag
Field Descriptions: PLMN-Identity
Consists of MCC and MNC. The first listed one is the Primary PLMN
p-Max
Value applicable for the cell. If absent the UE applies the maximum power according to the UE capability. If eNB configures the value more than the value supported by the UE then UE will set the max value aupported by the UE capability. Example UE Catagory 3 supports max 23 db
cellReservedForOperatorUse
As defined by operator (Reserved/Not_reserved)
trackingAreaCode
TAC which is common to the PLMN Identities
cellIdentity
Identifies a cell within the PLMN
cellBarred
If Barred then UE is not allowed to camp on the cell
intraFreqReselection
If enabled, UE will be able to perform Cell-reselection to INTRA-frequency cells
q_RxLevMin
Minimum required RX level in the cell
q_RxLevMinOffset
Actual value Qrxlevminoffset = IE value * 2 [dB]. only applied when a cell is evaluated for cell selection as a result of a periodic search for a higher priority PLMN while camped normally in a VPLMN [5]. During this periodic search for higher priority PLMN the UE may check the S criteria of a cell using parameter values stored from a different cell of this higher priority PLMN. Affects the minimum required Rx level in the cell.
freqBandIndicator
indicates the E-UTRA operating band
schedulingInfoList
information regarding the presence of SIB type; other than SIB1
si_Periodicity
Periodicity of the SI-message in radio frames (SI will be transmitted within the specified radio frame)
sib_MappingInfo
carries the List of the SIBs mapped. SIB2 is always present in the first element of schedulingInfoList
si_WindowLength
specifies that a SIB should be transmitted somewhere within the specified window length. Value is in ms. This window starts at the starting sub-frame of the mentioned si_periodicity. SIBs can be received in any of the sub-frame as mentioned in the WindowLength.
systemInfoValueTag
indicates if a change has occurred in the SI messages. UEs may use systemInfoValueTag, e.g. upon return from out of coverage, to verify if the previously stored SI messages are still valid. Additionally, the UE considers stored system information to be invalid after 3 hours from the moment it was successfully confirmed as valid, unless specified otherwise. Common for all SIBs other than MIB, SIB1, SIB10, SIB11 and SIB12.
SIB2 in LTE SIB-2: an IMPORTANT SIB
The IE SystemInformationBlockType2 contains radio resource configuration information that is common for all UEs.
It carries Common and shared channel configuration, RACH related configuration, Timers, UL Power controls.
Without this SIB UE cannot initiate ATTACH procedure.
SIB2 is not specifically included in the scheduling information in SIB1 but it is always mapped to the SI message that corresponds to the first entry in the list of SI messages in schedulingInfoList in SIB1
Signalling radio bearer: N/A RLC-Mode: TM Logical channel: BCCH Direction: E-UTRAN to UE Important contents of SystemInformationBlockType2 rach_ConfigCommon radioResourceConfigCommon numberOfRA_Preambles preamblesGroupAConfig_exist powerRampingParameters powerRampingStep preambleInitialReceivedTargetPower ra_SupervisionInfo preambleTransMax
ra_ResponseWindowSize mac_ContentionResolutionTimer maxHARQ_Msg3Tx 4 bcch_Config pcch_Config prach_Config pdsch_ConfigCommon pusch_ConfigCommon pucch_ConfigCommon soundingRS_UL_ConfigCommon uplinkPowerControlCommon ue_TimersAndConstants freqInfo timeAlignmentTimerCommon
Field Descriptions: ac-BarringInfo
Access Class Barring configuration
radioResourceConfig
used to specify common radio resource configurations in the system information and in the mobility control information
numberOfRA_Preambles
Number of non-dedicated random access preambles
preamblesGroupAConfig_exist
Provides the configuration for preamble grouping. If the field is not signalled, the size of the random access preambles group A is equal to numberOfRA-Preambles
powerRampingParameters powerRampingStep
Power ramping factor
preambleInitialReceivedTargetPower
Initial preamble power
ra_SupervisionInfo preambleTransMax
Maximum number of preamble transmission
ra_ResponseWindowSize
Duration of the RA response window. Value in subframes. Value sf2 corresponds to 2 subframes
mac_ContentionResolutionTimer
Timer for contention resolution. Value in subframes. Value sf8 corresponds to 8 subframes
maxHARQ_Msg3Tx 4
Maximum number of Msg3 HARQ transmissions, used for contention based random access
bcch_Config modificationPeriodCoeff
Actual modification period, expressed in number of radio frames= modificationPeriodCoeff * defaultPagingCycle. n2 corresponds to value 2
pcch_Config defaultPagingCycle
Default paging cycle, used to derive ‘T’. Value rf32 corresponds to 32 radio frames
nB
is used as one of parameters to derive the Paging Frame and Paging Occasion
prach_Config
used to specify the PRACH configuration in the system information and in the mobility control information
rootSequenceIndex
prach_ConfigIndex
mentions the: Preamble format: 0-4 (For frame structure 1 preamble format is 0-3 and for frame structure 2 it is 0-4) SFN: whether it will be EVEN no. frmae OR any frame subframe number: carrier the subframe no. within the SFN (Look for the table in TS36.211 - Table 5.7.1-2)
highSpeedFlag
TRUE corresponds to Restricted set and FALSE to Unrestricted set
zeroCorrelationZoneConfig
used for Preamble generation
pdsch_Config
used to specify the common and the UE specific PDSCH configuration
pusch_Config
used to specify the common PUSCH configuration and the reference signal configuration for PUSCH and PUCCH
pucch_Config
used to specify the common and the UE specific PUCCH configuration
soundingRS_UL_Config
used to specify the uplink Sounding RS configuration
uplinkPowerControl
used to specify parameters for uplink power control in the system information and in the dedicated signalling
ue_TimersAndConstants
Timer values
freqInfo
UL carrier frequency and bandwidth
timeAlignmentTimerCommon
used to control how long the UE is considered uplink time aligned. Value in subframes
SIB3 in LTE SIB3: Cell-reselection parameters for INTRA-Frequency, INTER-Frequency and Inter-RAT
contains Cell re-selection information common for intra-frequency, inter-frequency and inter-RAT cell re-selection (i.e. applicable for more than one type of cell re-selection but not necessarily all)
intra-frequency cell re-selection information other than neighbouring cell related
Signalling radio bearer: N/A RLC-Mode: TM Logical channel: BCCH Direction: E-UTRAN to UE Important contents of SystemInformationBlockType3 cellReselectionInfoCommon q_Hyst
speedStateReselectionPars_exist cellReselectionServingFreqInfo s_NonIntraSearch threshServingLow cellReselectionPriority intraFreqCellReselectionInfo q_RxLevMin s_IntraSearch presenceAntennaPort1 neighCellConfig p_Max
Field Descriptions: cellReselectionInfoCommon
Cell re-selection information common for cells
q_Hyst
This specifies the hysteresis value for cell re-selection ranking criteria. The specified value is added to the serving cell RSRP measurement.
speedStateReselectionPars
Speed dependent reselection parameters. If this field is absent then mobility State Parameters is not present. If q_hystSF is present then it is added to q_hyst. Carrier (-) value so as to reduce the ranking of the serving cell and allows cellreselection to occur easily.
cellReselectionServingFreqInfo
Information for Cell re-selection to inter-frequency and inter-RAT cells
s_NonIntraSearch
#used to trigger Interfrequency and IRATfrequency measurements for cell reselection when: - TARGET Interfreq. has lower or equal priority - IRAT freq. has a lower priority # specifies the Srxlev threshold (in dB) for E-UTRAN inter-frequency and inter-RAT measurements. #If the field s-NonIntraSearchP is present, the UE applies the value of sNonIntraSearchP. # Otherwise if neither s-NonIntraSearch nor s-NonIntraSearchP is present, the UE applies the (default) value of infinity for SnonIntraSearchP.
threshServingLow
This specifies the Srxlev threshold (in dB) below which the serving cell must fall before reselecting towards a lower priority RAT/ frequency. Value in between 0-31dB. Actual value=signalled value*2
cellReselectionPriority
explains the absolute priority of the concerned serving cell frequency /set of frequencies (GERAN)/ bandclass (CDMA2000), as used by the cell reselection procedure. Corresponds with parameter "priority". Value is between 0-7 where 0 means: lowest priority.
intraFreqCellReselectionInfo q_RxLevMin
Cell re-selection information common for intra-frequency cells Minimum required RSRP for cell reselection. value -70 - 22 dbm, Actual value=signalled value*2
s_IntraSearch
# used to trigger intrafreq. measurements # specifies the Srxlev threshold (in dB) for intra-frequency measurements. # If the field s-IntraSearchP is present, the UE applies the value of sIntraSearchP instead. Otherwise if neither 09s-IntraSearch nor sIntraSearchP is present, the UE applies the (default) value of infinity for SIntraSearchP.
presenceAntennaPort1
is used to09 indicate whether all the neighbouring cells use 09Antenna Port 1. When set to TRUE, the UE may assume that at least two cellspecific antenna ports are used in all neighbouring cells.
neighCellConfig
used to provide the information related to MBSFN and TDD UL/DL configuration of neighbour cells.
t_ReselectionEUTRA
# specifies the cell reselection timer value # defines time to trigger for cell reselection # The parameter can be set per E-UTRAN frequency
p_Max
# max. allowed UL transmit power for intra-frequency neighbouring EUTRA cells. If absent the UE applies the maximum power according to the UE capability
SIB4 in LTE 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] IntraFreqNeighCellInfo
List of intra-frequency neighbouring cells with specific cell re-selection parameters
physCellId
Physical CellID of the neighbour cell
q-OffsetCell intraFreqBlackCellList [1-16 instances]
specifies the offset between the two cells. Value -24 - +24dB 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)
SIB5 in LTE 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
SIB6 in LTE 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
SIB7 in LTE SIB7: Cell-reselection parameters INTER RAT Frequency (GERAN)
contains information relevant only for inter-RAT (GERAN) cell re-selection
Signalling radio bearer: N/A RLC-Mode: TM Logical channel: BCCH Direction: E-UTRAN to UE Important contents of SystemInformationBlockType7 t_ReselectionGERAN
Time to trigger for reselection. Value 0 to 7 sec.
carrierFreqsInfoList[0]
carries upto 16 instances of GERAN freq.
carrierFreqs startingARFCN
Start of the ARFCN
bandIndicator
dcs1800 or pcs1900
followingARFCNs
ARFCN groups
cellReselectionPriority
absolute priority of the GERAN layer. Value 0 to 7, whereas 0 is the lowest priority
ncc_Permitted
Network Color Code. Is a bitmap value
q_RxLevMin
minimum RSSI value required
p_MaxGERAN
maximum allowed UL transmit power
threshX_High
# Threshold (in dB) used by UE for cell re-selection to a HIGHER priority 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 frequency # 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
SIB9 in LTE SIB9: Home eNB name
contains a home eNB name (HeNB Name)
HeNB provie services to Closed Subscriber Groups. The HeNB name helps the user to select the correct CSG Identity when performing a manual selection
Signalling radio bearer: N/A RLC-Mode: TM Logical channel: BCCH Direction: E-UTRAN to UE Important contents of SystemInformationBlockType9 hnb-Name Field Descriptions: hnb-Name
Carries the name of the home eNB
SIB10 in LTE
SIB10: ETWS primary notification
contains an ETWS primary notification
Signalling radio bearer: N/A RLC-Mode: TM Logical channel: BCCH Direction: E-UTRAN to UE Important contents of SystemInformationBlockType10 messageIdentifier serialNumber warningType warningSecurityInfo
Field Descriptions: messageIdentifier
Identifies the source and type of ETWS notification (earthquake, tsunami warning, any emergency or test message)
serialNumber
Identifies variations of an ETWS notification. -uses various mechanisms to alert the user (display message, play a tone or vibrate, location where the message is applicable, also contains an update number which specifies whether a change is in the message content or not)
warningType
# Identifies the warning type of the ETWS primary notification (earthquake, tsunami, etc.) and # provides information on emergency user alert and UE popup
warningSecurityInfo
# is optional, only applied when security is applied # Provides security information for the ETWS notification
SIB11 in LTE SIB11: ETWS secondary notification
contains an ETWS secondary notification
Signalling radio bearer: N/A RLC-Mode: TM Logical channel: BCCH Direction: E-UTRAN to UE Important contents of SystemInformationBlockType11 messageIdentifier
serialNumber warningMessageSegmentType warningMessageSegmentNumber warningMessageSegment dataCodingScheme
Field Descriptions: messageIdentifier
Identifies the source and type of ETWS notification (earthquake, tsunami warning, any emergency or test message)
serialNumber
Identifies variations of an ETWS notification. -uses various mechanisms to alert the user (display message, play a tone or vibrate, location where the message is applicable, also contains an update number which specifies whether a change is in the message content or not)
warningMessageSegmentType [last/not last]
Indicates whether the included ETWS warning message segment is the last segment of the complete segment or not
warningMessageSegmentNumber
# allows oedering of the message segments # Segment number of the ETWS warning message segment contained in the SIB. A segment number of zero corresponds to the first segment, one corresponds to the second segment, and so on
warningMessageSegment
carries actual segment of the message
dataCodingScheme
Identifies the alphabet/coding and the language applied variations of an ETWS notification
SIB12 in LTE SIB12: CMAS notification
contains a CMAS notification
CMAS notifications carry high emerygency situations and is defined for three catagories:
-Presiential Alerts (President of a geographical location can send alerts) -Threat Alerts (Tornado/Hurricane alerts) -AMBER Alerts (Child abduction, endangered situation)
introduced in Release9
Signalling radio bearer: N/A RLC-Mode: TMLogical channel: BCCH Direction: E-UTRAN to UE
Important contents of SystemInformationBlockType12 messageIdentifier serialNumber warningMessageSegmentType warningMessageSegmentNumber warningMessageSegment dataCodingScheme
Field Descriptions: messageIdentifier
Identifies the source and type of CMAS notification
serialNumber
Identifies variations of a CMAS notification
warningMessageSegmentType
Indicates whether the included CMAS warning message segment is the last segment or not
warningMessageSegmentNumber
Segment number of the CMAS warning message segment contained in the SIB. A segment number of zero corresponds to the first segment, one corresponds to the second segment, and so on
warningMessageSegment
Carries a segment of the Warning Message
dataCodingScheme
Identifies the alphabet/coding and the language applied variations of a CMAS notification
SIB13 in LTE SIB13: MBMS control information
contains the information required to acquire the MBMS control information associated with one or more MBSFN areas
introduced in Release9
Signalling radio bearer: N/A RLC-Mode: TM Logical channel: BCCH Direction: E-UTRAN to UE Important contents of SystemInformationBlockType13 mbsfn-AreaInfoList