Sib

All about SIB's in LTE

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-2Common and shared channel configuration, RACH related configuration are present

SIB-3Parameters 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-10ETWS (Earthquake and Tsunami Warning System) information (Primary notification)

SIB-11ETWS (Earthquake and Tsunami Warning System) information (Secondary notification)

SIB-12 Commercial Mobile Alert Service (CMAS) information.

SIB-13Contains 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. schedulingInfoListb. si-WindowLengthd

schedulingInfoList informs the UE regarding the presence of SIB type; other than SIB1. It carriers two more parameters:

i. si_Periodicityii. 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

si_Periodicity SchedulingInfosi_Periodicity_rf16

sib_MappingInfo[0] SIB_TypeSIB_Type_sibType3







si_WindowLength ms20(To look for the complete IE contents and explanation of SIB1 click here)

The above table states the following:The first element of schedulingInfoList contains sib3

Periodicity= 16 radio framesor 160ms

Window length= 20ms

The seond element of schedulingInfoList contains sib4

Periodicity= 32 radio framesor 320ms

Window length= 20ms

The third element of schedulingInfoList contains sib5

Periodicity= 64 radio frames640ms

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 Integer value

n

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

w si-WindowLengthT 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

For SIB-3

x = (n – 1)*wx=(1-1)*20x=0

a = x mod 10a= 0 mod 10a=0

The SI Window will start at sub frame 0 of the Radio frame where SI will be acquired

For SIB-4

x = (n – 1)*wx=(2 - 1)*20x=20

a = x mod 10a= 20 mod 10a=0


For SIB-5

x = (n – 1)*wx=(3 - 1)*20x=40

a = x mod 10a= 40 mod 10a=0


Radio frame on which the UE will acquire designated SIB

For

SIB-3SFN mod T = FLOOR(x/10)

SFN mod 16 = FLOOR (0/10)

SFN mod 16 = 0

Whenever SFN mod 16 will be 0. UE

is expecting SIB3 and it will start

looking from sub frame 0 till the end of

the mentioned si-WindowLength

For



SFN mod 32 = 2



looking at sub frame 0 till the end of


For



SFN mod 64 = 4



looking at sub frame 0 till the end of


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-2Common and shared channel configuration, RACH related configuration are present

SIB-3Parameters 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-10ETWS (Earthquake and Tsunami Warning System) information (Primary notification)

SIB-11ETWS (Earthquake and Tsunami Warning System) information (Secondary notification)

SIB-12 Commercial Mobile Alert Service (CMAS) information.

SIB-13Contains the information required to acquire the MBMS control information associated with one or more MBSFN areas.

SIB1 in LTEThe 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: TMLogical channel: BCCHDirection: 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 SystemInformationBlockType1cellAccessRelatedInfo 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 IdentitiescellIdentity Identifies a cell within the PLMNcellBarred 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

schedulingInfoListinformation regarding the presence of SIB type; other than SIB1

si_PeriodicityPeriodicity of the SI-message in radio frames (SI will be transmitted within the specified radio frame)

sib_MappingInfocarries 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 LTESIB-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: TMLogical channel: BCCHDirection: E-UTRAN to UE

Important contents of SystemInformationBlockType2rach_ConfigCommonradioResourceConfigCommon numberOfRA_Preambles preamblesGroupAConfig_exist powerRampingParameters powerRampingStep preambleInitialReceivedTargetPower ra_SupervisionInfo preambleTransMax ra_ResponseWindowSize mac_ContentionResolutionTimer maxHARQ_Msg3Tx 4bcch_Configpcch_Configprach_Configpdsch_ConfigCommonpusch_ConfigCommonpucch_ConfigCommonsoundingRS_UL_ConfigCommonuplinkPowerControlCommonue_TimersAndConstantsfreqInfotimeAlignmentTimerCommon

Field Descriptions:ac-BarringInfo Access Class Barring configuration

radioResourceConfigused 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_existProvides 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_ResponseWindowSizeDuration of the RA response window. Value in subframes. Value sf2 corresponds to 2 subframes

mac_ContentionResolutionTimerTimer for contention resolution. Value in subframes. Value sf8 corresponds to 8 subframes

maxHARQ_Msg3Tx 4Maximum 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

defaultPagingCycleDefault paging cycle, used to derive ‘T’. Value rf32 corresponds to 32 radio frames

nBis used as one of parameters to derive the Paging Frame and Paging Occasion

prach_Configused 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 framesubframe number: carrier the subframe no. within the SFN (Look for the table in TS36.211 - Table 5.7.1-2)

highSpeedFlagTRUE corresponds to Restricted set and FALSE to Unrestricted set

zeroCorrelationZoneConfig used for Preamble generation

pdsch_Configused to specify the common and the UE specific PDSCH configuration

pusch_Configused to specify the common PUSCH configuration and the reference signal configuration for PUSCH and PUCCH

pucch_Configused to specify the common and the UE specific PUCCH configuration

soundingRS_UL_Config used to specify the uplink Sounding RS configuration

uplinkPowerControlused to specify parameters for uplink power control in the system information and in the dedicated signalling

ue_TimersAndConstants Timer valuesfreqInfo UL carrier frequency and bandwidth

timeAlignmentTimerCommon used to control how long the UE is considered uplink time aligned. Value in subframes

SIB3 in LTESIB3 : 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


Important contents of SystemInformationBlockType3 cellReselectionInfoCommon q_Hyst speedStateReselectionPars_existcellReselectionServingFreqInfo s_NonIntraSearch threshServingLow cellReselectionPriorityintraFreqCellReselectionInfo q_RxLevMin

s_IntraSearch presenceAntennaPort1neighCellConfigp_Max

Field Descriptions:cellReselectionInfoCommon Cell re-selection information common for cells

q_HystThis 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.

cellReselectionServingFreqInfoInformation 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 s-NonIntraSearchP.# 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.

intraFreqCellReselectionInfoCell re-selection information common for intra-frequency cells

q_RxLevMinMinimum 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 s-IntraSearchP instead. Otherwise if neither 09s-

IntraSearch nor s-IntraSearchP 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 cell-specific antenna ports are used in all neighbouring cells.

neighCellConfigused 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 E-UTRA cells. If absent the UE applies the maximum power according to the UE capability

SIB4 in LTESIB4: 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


Important contents of SystemInformationBlockType4 intraFreqNeighCellList physCellId q-OffsetCellintraFreqBlackCellList physCellId RangeCellcsg_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-OffsetCellspecifies the offset between the two cells. Value -24 - +24dB

intraFreqBlackCellList List of blacklisted intra-frequency neighbouring cells. These

[1-16 instances] 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 LTESIB5 : 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


Important contents of SystemInformationBlockType5

InterFreqCarrierFreqInfo can be specified upto 8 carrier frequenciesdl-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-ReselectionEUTRAdefines 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

allowedMeasBandwidthdefined in terms of Resouce blocks associated with a specific channel bandwidth

cellReselectionPriority defines the Abolute priority of the frequency layerneighCellConfig information regarding the neighbouring cells

q-OffsetFreqdefines 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 frequencySignalling radio bearer: N/A RLC-Mode: TMLogical channel: BCCHDirection: E-UTRAN to UE


carrierFreqListUTRA_FDD/TDD carrierFreq cellReselectionPriority threshX_High threshX_Low q_RxLevMin p_Max q_QualMint_ReselectionUTRAt_ReselectionUTRA_SF SF_Medium SF_High

Field Descriptions:

carrierFreqListUTRA_FDD/TDDInformation specified for up to 16 instances of RF carriers for FDD or TDD

carrierFreq carrier frequency helps the UE to seach

cellReselectionPrioritydefines 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_RxLevMinminimum RSCP requirement for candiate UMTS cell. Value -60 to -13 dB. Actual value= Signaled value * 2 +1

p_MaxValue 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 : Cell-reselection parameters INTER RAT Frequency (GERAN) contains information relevant only for inter-RAT (GERAN) cell re-selection



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

cellReselectionPriorityabsolute 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 : 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


Important contents of SystemInformationBlockType9 hnb-Name

Field Descriptions:

hnb-Name Carries the name of the home eNB

SIB10 : ETWS primary notification contains an ETWS primary notification


Important contents of SystemInformationBlockType10 messageIdentifierserialNumberwarningTypewarningSecurityInfo

Field Descriptions:

messageIdentifierIdentifies 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 LTESIB11 : ETWS secondary notification contains an ETWS secondary notification


Important contents of SystemInformationBlockType11 messageIdentifierserialNumberwarningMessageSegmentTypewarningMessageSegmentNumberwarningMessageSegmentdataCodingScheme

Field Descriptions:

messageIdentifierIdentifies 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

dataCodingSchemeIdentifies the alphabet/coding and the language applied variations of an ETWS notification

SIB12 in LTESIB12 : 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


Important contents of SystemInformationBlockType12 messageIdentifierserialNumberwarningMessageSegmentTypewarningMessageSegmentNumberwarningMessageSegmentdataCodingScheme

Field Descriptions:messageIdentifier

Identifies the source and type of CMAS notification

serialNumber Identifies variations of a CMAS notification

warningMessageSegmentTypeIndicates 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

dataCodingSchemeIdentifies the alphabet/coding and the language applied variations of a CMAS notification

SIB13 : MBMS control information contains the information required to acquire the MBMS control information associated with one or more MBSFN areas

introduced in Release9


Important contents of SystemInformationBlockType13 mbsfn-AreaInfoList

http://lteinwireless.blogspot.in/2012/12/sib2-in-lte.html

http://howltestuffworks.blogspot.in/2012/07/resource-allocation-type-0.html

http://www.sharetechnote.com/html/BasicCallFlow_LTE.html

http://www.sharetechnote.com/html/BasicCallFlow_LTE.html

http://howltestuffworks.blogspot.in/2012/07/resource-allocation-type-0.html

http://lteinwireless.blogspot.in/2012/12/sib2-in-lte.html

Documents

Sib