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Content for  TS 23.041  Word version:  17.0.0

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9.3.20  CBS-Message-Information-Length n

This parameter gives the number of octets of the CBS-Message-Information-Page n containing user information. The remaining octets of the CBS-Message-Information-Page n contain only padding information and are not included in this parameter.
In the case where the user information is encoded using the GSM 7 bit default alphabet and the last character terminates at an octet boundary, this parameter indicates the number of octets of user information. In the case where the last character does not terminate at an octet boundary, this parameter indicates the number of octets up to the octet boundary immediately following the last GSM 7 bit default alphabet character of user information.
In UMTS and E-UTRAN, the CBS-Message-Information-Pages together with the associated CBS-Message-Information-Length parameter are broadcasted as a single unit over the radio inteface, and are part of 'CB Data' parameter at the UE.
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9.3.21  Recovery-Indication

Indicates whether the CBS related data was lost or is still available.
The following values should be coded:
  • Data-available;
  • Data-lost.

9.3.22Void

9.3.23  Paging-ETWS-Indicator |R8|

This parameter indicates that emergency information shall be sent over the paging message.
In UMTS the parameter remotely activates the UE to receive CBS messages.
In GSM the parameter indicates that an ETWS emergency message is included in the WRITE-REPLACE primitive.

9.3.24  Warning-Type |R8|

This parameter is set when ETWS is used. It has three fields in order to contain warning type value, emergency user alert and popup indications.
The warning type value field indicates the following 5 warning types as its values; earthquake, tsunami, earthquake and tsunami, test, and other. Also, other warning types can be defined in the future if it is required.
The values for this parameter are expressed in 7-bit string. The following table shows the values and their corresponding warning types.
Warning typeValue Warning type
0000000Earthquake
0000001Tsunami
0000010Earthquake and Tsunami
0000011Test
0000100Other
0000101-1111111Reserved for future use
 
The fields for emergency user alert and popup indications are type binary. They are used to command mobile terminals to activate emergency user alert and message popup in order to alert the users upon the reception of ETWS primary notification (e.g. paging message). The codings for the fields are shown below:
Field Emergency User Alert Popup
Value0101
Instruction to TerminalNo instruction as to emergency alert.Activate emergency user alert.No instruction as to popup.Activate popup on the display.
 
The encoding of the Warning-Type parameter is as shown below. The warning type value shall be mutually exclusive and binary encoded.
Octet 1 Octet 2
76543210 76543210
Warning Type Value Emergency User Popup Padding
Alert
 
The values of this parameter are sent to the mobile terminals (e.g. over the paging message which remotely activates the UE to receive CBS messages).
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9.3.25  Warning-Security-Information |R8|Word‑p. 60
This parameter is only set when ETWS primary notification is sent with security. This parameter is 50 bytes in length and contains 7 byte timestamp and 43 byte digital signature.
8 7 6 5 4 3 2 1
Year octet 1
Month octet 2
Day octet 3
Hour octet 4
Minute octet 5
Second octet 6
Time zone octet 7
Digital Signature octet 8 - octet 50
 
Year (octet 1, bits 1-8):
This field uses the same format as the Year field used in the TP-Service-Centre-Time-Stamp, which is defined in TS 23.040.
Month (octet 2, bits 1-8):
This field uses the same format as the Month field used in the TP-Service-Centre-Time-Stamp, which is defined in TS 23.040.
Day (octet 3, bits 1-8):
This field uses the same format as the Day field used in the TP-Service-Centre-Time-Stamp, which is defined in TS 23.040.
Hour (octet 4, bits 1-8):
This field uses the same format as the Hour field used in the TP-Service-Centre-Time-Stamp, which is defined in TS 23.040.
Minute (octet 5, bits 1-8):
This field uses the same format as the Minute field used in the TP-Service-Centre-Time-Stamp, which is defined in TS 23.040.
Second (octet 6, bits 1-8):
This field uses the same format as the Second field used in the TP-Service-Centre-Time-Stamp, which is defined in TS 23.040.
Time Zone (octet 7, bits 1-8):
This field uses the same format as the Time Zone field used in the TP-Service-Centre-Time-Stamp, which is defined in TS 23.040.
Digital Signature (octet 8 - 50, bits 1-8):
This field contains the 43 byte digital signature.
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9.3.26  Warning Period |R9|Word‑p. 61
This parameter indicates the length of the period during which the ETWS emergency message is to be broadcasted in the BSC. This parameter is applicable for GSM only.

9.3.27  Broadcast Message Type |R9|

This parameter is applicable for GSM only.
It indicates if the primitive including this parameter is referring to:
  • CBS message broadcasting; or
  • ETWS emergency message broadcasting.

9.3.28  Message Type |R11|

This parameter is applicable for E-UTRAN and NG-RAN only.
The Message Type IE uniquely identifies the message being sent; see TS 29.168 for E-UTRAN and TS 29.518 for NG-RAN.

9.3.29  List of TAIs |R11|

This parameter is applicable for E-UTRAN only.
The Tracking Area ID List IE is used to uniquely identify a Tracking Area; see TS 36.413 for E-UTRAN.

9.3.30  Warning Area List |R11|

This parameter is applicable for E-UTRAN only.
The Warning Area List IE indicates the areas where the warning message needs to be broadcast. The Warning Area List consists of a Cell ID list (see subclause 9.3.5) or a TAI list (see subclause 9.3.29) or an Emergency Area ID list; see subclause 9.3.47.

9.3.31  OMC ID |R11|

This parameter is applicable for E-UTRAN and NG-RAN only.
The OMC ID IE indicates the identity of an Operation and Maintenance Centre to which Trace Records shall be sent. This element consists of a string of maximum 20 octets; see TS 29.168 for E-UTRAN and TS 29.518 for NG-RAN.

9.3.32  Concurrent Warning Message Indicator |R11|Word‑p. 62
This parameter is applicable for E-UTRAN and NG-RAN only.
The Concurrent Warning Message Indicator IE indicates to eNB that the received warning message is a new message to be scheduled for concurrent broadcast with any other ongoing broadcast of warning messages. This element is an enumerated type; see TS 36.413 for E-UTRAN and TS 38.413 for NG-RAN.
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9.3.33  Cause-E-UTRAN |R11|

This parameter is applicable for E-UTRAN only.
The purpose of the Cause E-UTRAN IE is to indicate the reason for a particular event for the SBc-AP protocol. This element is an integer; see TS 29.168.

9.3.34  Criticality Diagnostics |R11|

This parameter is applicable for E-UTRAN and NG-RAN only.
The Criticality Diagnostics IE is sent by the MME/AMF when parts of a received message have not been comprehended or were missing, or if the message contained logical errors. When applicable, it contains information about which IEs were not comprehended or were missing; see TS 29.168 for E-UTRAN and TS 29.518 for NG-RAN.
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9.3.35  Warning Message Content E-UTRAN |R11|

This parameter is applicable for E-UTRAN only.
The Warning Message Content E-UTRAN IE contains user information, e.g., the message with warning contents, and will be broadcast over the radio interface. This element is a string of maximum 9600 octets; see TS 36.413.
The content of Warning Message Content E-UTRAN IE consists of the following parameters:
Parameter Reference Presence
Number-of-Pages 9.3.4M
CBS-Message-Information-Page 1 9.3.19M
CBS-Message-Information-Length 1 9.3.20M
CBS-Message-Information-Page 2 9.3.19O
CBS-Message-Information-Length 2 9.3.20O
:
CBS-Message-Information-Page n 9.3.19O
CBS-Message-Information-Length n 9.3.20O
 
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9.3.36  Repetition-Period E-UTRAN |R11|

This parameter is applicable for E-UTRAN only.
The Repetition Period E-UTRAN IE indicates the periodicity in seconds of the warning message to be broadcast.This element is an integer with a value between 0 and 4095; see TS 36.413.

9.3.37  Extended Repetition-Period |R11|Word‑p. 63
This parameter is applicable for E-UTRAN only.
The Extended Repetition-Period IE indicates the periodicity in seconds of the warning message to be broadcast. This IE is used if the Repetition Period has a value larger than 4095 and is an integer between 4096 and (217-1); see TS 36.413 for E-UTRAN.

9.3.38  Unknown Tracking Area List |R12|

This parameter is applicable for E-UTRAN and NG-RAN only.
The Unknown Tracking Area List IE identifies the Tracking Areas that are unknown to the MME/AMF and where the Request cannot be delivered.This IE is of type List of TAI (see subclause 9.3.29).
This IE shall not be included if the Cause IE indicates Tracking area not valid. The Cause IE indicating Tracking area not valid is used when all Tracking Areas in the Request are invalid.
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9.3.39  Send Write-Replace-Warning-Indication |R12|

This parameter is applicable for E-UTRAN and NG-RAN only.
For E-UTRAN:
The Send Write-Replace-Warning-Indication IE indicates to the MME that the MME shall send the WRITE-REPLACE WARNING INDICATION to the CBC for the warning message. This element is an enumerated type; see TS 29.168.
For NG-RAN:
The Send Write-Replace-Warning-Indication IE indicates to the AMF that the AMF shall send the WRITE-REPLACE WARNING INDICATION-NG-RAN to the CBCF for the warning message. This element is an enumerated type; see TS 29.518.
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