SIB8
SIB8 is an RRC information element of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.
Definition
SIB8 contains a CMAS notification.
SIB8 ::= SEQUENCE {
messageIdentifier BIT STRING (SIZE (16)),
serialNumber BIT STRING (SIZE (16)),
warningMessageSegmentType ENUMERATED {notLastSegment, lastSegment},
warningMessageSegmentNumber INTEGER (0..63),
warningMessageSegment OCTET STRING,
dataCodingScheme OCTET STRING (SIZE (1)) OPTIONAL, -- Cond Segment1
warningAreaCoordinatesSegment OCTET STRING OPTIONAL, -- Need R
lateNonCriticalExtension OCTET STRING OPTIONAL,
...
}Fields (8)
| Field | Description |
|---|---|
| messageIdentifier BIT STRING (SIZE (16)) | Identifies the source and type of CMAS notification. |
| serialNumber BIT STRING (SIZE (16)) | Identifies variations of a CMAS notification. |
| warningMessageSegmentType ENUMERATED {notLastSegment, lastSegment} | Indicates whether the included CMAS warning message segment is the last segment or not. If warning area coordinates are provided for the warning message, then this field applies to both warning message segment and warning area coordinates segment. |
| warningMessageSegmentNumber INTEGER (0..63) | 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. If warning area coordinates are provided for the warning message, then this field applies to both warning message segment and warning area coordinates segment. |
| warningMessageSegment OCTET STRING | Carries a segment, with one or more octets, of the Warning Message Contents IE defined in TS 38.413 [42]. The first octet of the Warning Message Contents IE is equivalent to the first octet of the CB data IE defined in and encoded according to TS 23.041 [29], clause 9.4.2.2.5, and so on. |
| dataCodingScheme OCTET STRING (SIZE (1)) · OPTIONAL Cond Segment1 | Identifies the alphabet/coding and the language applied variations of a CMAS notification. |
| warningAreaCoordinatesSegment OCTET STRING · OPTIONAL Need R | Carries a segment, with one or more octets, of the geographical area where the CMAS warning message is valid as defined in [28]. The first octet of the first warningAreaCoordinatesSegment is equivalent to the first octet of Warning Area Coordinates IE defined in and encoded according to TS 23.041 [29] and so on. |
| lateNonCriticalExtension OCTET STRING · OPTIONAL |