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