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

Field Descriptions:
messageIdentifierIdentifies the source and type of ETWS notification (earthquake, tsunami warning, any emergency or test message)
serialNumberIdentifies 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)
[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
warningMessageSegmentcarries actual segment of the message 
dataCodingSchemeIdentifies the alphabet/coding and the language applied variations of an ETWS notification

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