messageIdentifier: this parameter provides the type of notification. serialNumber: this setting provides a trace of changes from different notifications. warningType: this parameter indicates whether the notification relates to an earthquake only, a tsunami only, or an earthquake and a tsunami. 9.1.8. SIB7 message The SIB7 message provides more detailed information about ETWS alerts. The SIB7 message contains the following parameters: SystemInformationBlockTypell messageIdentifier serialNumber warningMessageSegmentType warningMessageSegmentNumber warningMessageSegment dataCodingScheme NG-RAN and 5G-NR messageIdentifier: this parameter provides the type of notification. serialNumber: this setting provides a trace of changes to different notifications. warningMessageSegmentTypet this parameter indicates whether the warningMessageSegment parameter is the last segment constituting the message warningMessageSegmentNumber: this parameter indicates the segment number. warningMessageSegment: this parameter contains the segment of the alert message. dataCodingScheme: this parameter defines the syntax used for the alert message. 9.1.9. SIB8 message The SIB8 message, introduced in Release 9, provides Commercial Mobile Alert System (CMAS) information for the North American version. The SIB8 message contains the same parameters as the SIB7 message: SystemInformationBlockType12 messageIdentifier serialNumber warningMessageSegmentType warningMessageSegmentNumber warningMessageSegment dataCodingScheme 9.1.10. SIB9 message The SIB9 message carries the GPS information of the base station and the UTC (Coordinated Universal Time). 9.1.11. Summary The minimum information is carried by the MIB and SIB1. Once the MIB is received, SIB1 contains the RMSI. Table 9.2 summarizes the different messages carried by each SIB. 5G-NR Radio Interface - Radio Access Procedure Content Number of SFN frames, critical information for the reception of SIB1 1, flag on the authorized or unauthorized state of the cell and intra-frequency cell re-selection 