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Content for  TS 23.041  Word version:  17.0.0

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9.4  Message Format on the Radio Network - MS/UE Interface

9.4.1  GSM

The CBS messages which are transmitted by the BTS for the MS include the CBS Message (information for the user) and Schedule Message (schedule of CBS messages).
The use and the formatting of the CBS messages, which contain information for the MS user, is described in this clause.
The Schedule Message is broadcast to support CBS DRX mode for Mobile Stations. The Schedule Message is helpful in minimizing battery usage for Cell Broadcast in the Mobile Station, because it allows the MS to ignore transmissions of CBS messages the customer is not interested in. The use and formatting of the Schedule Message is described in TS 44.012.
The handling of the GSM only applicable ETWS Primary Notification messages differ from what is stated in this clause and is instead described in subclause 9.4.1.3.
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9.4.1.1  General Description

Each page of a CBS Message sent to the MS by the BTS is a fixed block of 88 octets as coded in TS 44.012. This is sent on the channel allocated as CBCH by TS 45.002. The 88 octets of the CBS Message are formatted as described in subclause 9.3.2.

9.4.1.2  Message ParameterWord‑p. 68
Octet Number(s) Field
1 2Serial Number
3 4Message Identifier
5Data Coding Scheme
6Page Parameter
7 88Content of Message
The octets in the above table are transmitted in order, starting with octet 1. The bits within these octets are numbered 0 to 7; bit 0 is the low order bit and is transmitted first.
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9.4.1.2.1  Serial Number
This parameter is a 16-bit integer which identifies a particular CBS message (which may be one to fifteen pages in length) from the source and type indicated by the Message Identifier and is altered every time the CBS message with a given Message Identifier is changed.
The two octets of the Serial Number field are divided into a 2-bit Geographical Scope (GS) indicator, a 10 bit Message Code and a 4-bit Update Number as shown below:
Octet 1 Octet 2
76543210 76543210
GS Message Code Update Number
The most significant bit of the update number is octet 2 bit 3. The most significant bit of the Message Code is octet 1 bit 5 and the least significant bit of the Message Code is octet 2 bit 4. The most significant bit of the Geographical Scope is octet 1 bit 7.
  • Message Code:
    The Message Code differentiates between CBS messages from the same source and type (i.e. with the same Message Identifier). Message Codes are for allocation by PLMN operators.
    The Message Code identifies different message themes. For example, let the value for the Message Identifier be "Automotive Association" (= source), "Traffic Reports" (= type). Then "Crash on A1 J5" could be one value for the message code, "Cow on A32 J4" could be another, and "Slow vehicle on M3 J3" yet another.
    In the case of transmitting CBS messages for ETWS, i.e. the Message Identifier has a value for ETWS (see subclause 9.4.1.2.2), a part of Message Code can be used to command mobile terminals to activate emergency user alert and message popup in order to alert the users. Message Code format for this purpose is as follows:
    5432107654
    Emergency User Alert Popup
    The codings of the Emergency User Alert and Popup fields are shown below:
    Field Code Instruction to Terminal
    Emergency User Alert0No instruction as to emergency user alert.
    1Activate emergency user alert.
    Popup0No instruction as to popup.
    1Activate popup on the display.
  • Geographical Scope:
    The Geographical Scope (GS) indicates the geographical area over which the Message Code is unique, and the display mode. The CBS message is not necessarily broadcast by all cells within the geographical area. When two CBS messages are received with identical Serial Numbers/Message Identifiers in two different cells, the Geographical Scope may be used to determine if the CBS messages are indeed identical.
    In particular, the Geographical Scope tells the mobile if the CBS message is:
    • only cell wide (which means that if a message is displayed it is desirable that the message is removed from the screen when the UE selects the next cell and if any CBS message is received in the next cell it is to be regarded as "new"), or
    • PLMN wide (which means that the Message Code and/or Update Number must change in the next cell, of the PLMN, for the CBS message to be "new". The CBS message is only relevant to the PLMN in which it is broadcast, so any change of PLMN (including a change to another PLMN which is an ePLMN) means the CBS message is "new"), or
    • Location Area wide (in GSM) (which means that a CBS message with the same Message Code and Update Number may or may not be "new" in the next cell according to whether the next cell is in the same Location Area as the current cell), or
    • Service Area wide (in UMTS) (which means that a CBS message with the same Message Code and Update Number may or may not be "new" in the next cell according to whether the next cell is in the same Service Area as the current cell), or
    • Tracking Area wide (in E-UTRAN) (which means that a warning message with the same Message Code and Update Number may but need not be "new" in the next cell according to whether the next cell is in the same Tracking Area as the current cell), or
    • Tracking Area wide (in NG-RAN) (which means that a warning message with the same Message Code and Update Number may but need not be "new" in the next cell according to whether the next cell is in the same Tracking Area as the current cell).
      The display mode indicates whether the CBS message is supposed to be on the display all the time ("immediate") or only when the user wants to see it ("normal"). In either case, the CBS message will be displayed only if its Message Identifier is contained within the "search list" of the mobile (see subclause 9.3.2). These display modes are indicative of intended use, without indicating a mandatory requirement or constraining the detailed implementation by mobile manufacturers. The user may be able to select activation of these different modes.
      The coding of the Geographical Scope field is shown below:
      GS Code Display Mode Geographical Scope
      00ImmediateCell wide
      01NormalPLMN wide
      10NormalLocation Area wide in GSM, Service Area wide in UMTS, Tracking Area wide in E-UTRAN, Tracking Area wide in NG-RAN
      11NormalCell wide
      Immediate = default direct display.
      Normal = default display under user interaction.
      Code 00 is intended for use by the network operators for base station IDs but this code can also be used for other applications. Use of GS=00 takes precedence over the setting of the DCS Message class (see TS 23.038)
  • Update Number:
    The Update Number indicates a change of the message content of the same CBS message, i.e. the CBS message with the same Message Identifier, Geographical Scope, and Message Code.
    In other words, the Update Number will differentiate between older and newer versions of the same CBS message, within the indicated geographical area. A new CBS message may have Update Number 0000; however this number will increment by 1 for each update.
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9.4.1.2.2  Message IdentifierWord‑p. 70
This parameter identifies the source and type of the CBS message. For example, "Automotive Association" (= source), "Traffic Reports" (= type) could correspond to one value. A number of CBS messages may originate from the same source and/or be of the same type. These will be distinguished by the Serial Number. The Message Identifier is coded in binary.
The ME shall attempt to receive the CBS messages whose Message Identifiers are in the "search list". This "search list" shall contain the Message Identifiers stored in the EFCBMI, EFCBMID and EFCBMIR files on the SIM (see 3GPP TS 11.11) and any Message Identifiers stored in the ME in a "list of CBS messages to be received". If the ME has restricted capabilities with respect to the number of Message Identifiers it can search for, the Message Identifiers stored in the SIM shall take priority over any stored in the ME.
The use/application of the Message Identifier is shown in the following table, with octet 3 of the Message Identifier in hex shown first, followed by octet 4. Thus "1234" (hex) represents octet 3 = 0001 0010 and octet 4 = 0011 0100.
The MS shall discard a CBS message in Message Identifier value range "A000hex-AFFFhex" unless it is received from:
  • HPLMN;
  • EHPLMN; or
  • PLMN that is equivalent to either HPLMN or EHPLMN.
Networks shall only use Message Identifiers from the range 4352 - 6399 (1100 hex - 18FF hex) for Public Warning System as defined in TS 22.268. If a message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message. Processing of different language codes is specified in subclause 9.4.1.2.3 and subclause 9.4.2.2.4.
Decimal Hex Meaning
0 - 9990000 - 03E7 To be allocated by GSMA(see GSMA AD.26 [25]). If a Message Identifier from this range is in the "search list", the ME shall attempt to receive such CBS message.
This version of this document does not prohibit networks from using Message Identifiers in the range 0000 - 03E7 (hex) for Cell Broadcast Data Download to the SIM.
100003E8 LCS CBS Message Identifier for E-OTD Assistance Data message.
100103E9 LCS CBS Message Identifier for DGPS Correction Data message.
100203EA LCS CBS Message Identifier for GPS Ephemeris and Clock Correction Data message.
100303EB LCS CBS Message Identifier for GPS Almanac and Other Data message.
1004 - 409503EC - 0FFF Intended for standardization in future versions of this document. These values shall not be transmitted by networks that are compliant to this version of this document. If a Message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
4096 - 42231000 - 107F Networks shall only use Message Identifiers from this range for Cell Broadcast Data Download in "clear" (i.e. unsecured) to the SIM (see 3GPP TS 11.14). If a message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
Not settable by MMI
4224 - 43511080 - 10FF Networks shall only use Message Identifiers from this range for Cell Broadcast Data Download secured according to TS 23.048 to the SIM (see 3GPP TS 11.14). If a message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
Not settable by MMI
43521100 ETWS CBS Message Identifier for earthquake warning message.
43531101 ETWS CBS Message Identifier for tsunami warning message.
43541102 ETWS CBS Message Identifier for earthquake and tsunami combined warning message.
43551103 ETWS CBS Message Identifier for test message.
The UE silently discards this message. A UE specially designed for testing purposes may display its contents.
43561104 ETWS CBS Message Identifier for messages related to other emergency types.
4357 - 43591105 - 1107 ETWS CBS Message Identifier for future extension.
4360 - 43691108 - 1111 Intended for standardization in future versions of this document. These values shall not be transmitted by networks that are compliant to this version this document. If a Message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
43701112 CMAS CBS Message Identifier for CMAS Presidential Level Alerts.
EU-Alert Level 1 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 0 Message Identifier.
Not settable by MMI.
43711113 CMAS CBS Message Identifier for CMAS Extreme Alerts with Severity of Extreme, Urgency of Immediate, and Certainty of Observed.
EU-Alert Level 2 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see TS 22.268.
43721114 CMAS CBS Message Identifier for CMAS Extreme Alerts with Severity of Extreme, Urgency of Immediate, and Certainty of Likely.
EU-Alert Level 2 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see TS 22.268.
43731115 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Extreme, Urgency of Expected, and Certainty of Observed.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see TS 22.268.
43741116 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Extreme, Urgency of Expected, and Certainty of Likely.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see TS 22.268.
43751117 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Immediate, and Certainty of Observed.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see TS 22.268.
43761118 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Immediate, and Certainty of Likely.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see TS 22.268.
43771119 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Expected, and Certainty of Observed.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see TS 22.268.
4378111A CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Expected, and Certainty of Likely.
EU-Alert Level 3 Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see TS 22.268.
4379111B CMAS CBS Message Identifier for Child Abduction Emergency (or Amber Alert).
EU-Amber Message Identifier for the local language as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier.
Settable by MMI
For subscriber opt-out requirements, see TS 22.268.
4380111C CMAS CBS Message Identifier for the Required Monthly Test.
According to CMAS requirements (see TS 22.268), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message.
4381111D CMAS CBS Message Identifier for CMAS Exercise.
According to CMAS requirements (see TS 22.268), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message.
4382111E CMAS CBS Message Identifier for operator defined use.
According to CMAS requirements (see TS 22.268), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message.
4383111F CMAS CBS Message Identifier for CMAS Presidential Level Alerts for additional languages.
EU-Alert Level 1 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 0 Message Identifier for additional languages.
Not settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
43841120 CMAS CBS Message Identifier for CMAS Extreme Alerts with Severity of Extreme, Urgency of Immediate, and Certainty of Observed for additional languages.
EU-Alert Level 2 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
43851121 CMAS CBS Message Identifier for CMAS Extreme Alerts with Severity of Extreme, Urgency of Immediate, and Certainty of Likely for additional languages.
EU-Alert Level 2 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
43861122 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Extreme, Urgency of Expected, and Certainty of Observed for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
43871123 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Extreme, Urgency of Expected, and Certainty of Likely for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
43881124 CMAS CBS Message for CMAS Severe Alerts with Severity of Severe, Urgency of Immediate, and Certainty of Observed for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
43891125 CMAS CBS Message for CMAS Severe Alerts with Severity of Severe, Urgency of Immediate, and Certainty of Likely for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
43901126 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Expected, and Certainty of Observed for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
43911127 CMAS CBS Message Identifier for CMAS Severe Alerts with Severity of Severe, Urgency of Expected, and Certainty of Likely for additional languages.
EU-Alert Level 3 Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
43921128 CMAS CBS Message Identifier for Child Abduction Emergency (or Amber Alert) for additional languages.
EU-Amber Message Identifier for additional languages as defined in ETSI TS 102 900 [32].
Korean Public Alert System (KPAS) Class 1 Message Identifier for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
43931129 CMAS CBS Message Identifier for the Required Monthly Test for additional languages.
According to CMAS requirements (see TS 22.268), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message dependent on the language indicated in the CBS message and the language indicator settings in the ME.
4394112A CMAS CBS Message Identifier for CMAS Exercise for additional languages.
According to CMAS requirements (see TS 22.268), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message dependent on the language indicated in the CBS message and the language indicator settings in the ME.
4395112B CMAS CBS Message Identifier for operator defined use for additional languages.
According to CMAS requirements (see TS 22.268), if this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message dependent on the language indicated in the CBS message and the language indicator settings in the ME.
4396112C CMAS CBS Message Identifier for CMAS Public Safety Alerts.
Settable by MMI.
For subscriber opt-out requirements, see TS 22.268.
4397112D CMAS CBS Message Identifier for CMAS Public Safety Alerts for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
4398112E CMAS CBS Message Identifier for CMAS State/Local WEA Test.
Settable by MMI.
For subscriber opt-out requirements, see TS 22.268.
4399112F CMAS CBS Message Identifier for CMAS State/Local WEA Test for additional languages.
Settable by MMI.
The ME shall receive the messages dependent on the language indicated in the CBS message and the language indicator settings in the ME.
For subscriber opt-out requirements, see TS 22.268.
44001130 CMAS CBS Message Identifier for geo-fencing trigger messages.
44011131 Non-ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality.
Not applicable for US WEA
44021132 Non-ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when an earthquake occurs.
Not applicable for US WEA
44031133 Non-ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a volcanic eruption occurs.
Not applicable for US WEA
44041134 Non-ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is water (e.g. flood, typhoon, hurricane or tsunami) occurs.
Not applicable for US WEA
44051135 Non-ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is fire (e.g. forest fire or building fire) occurs.
Not applicable for US WEA
44061136 Non-ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is pressure (e.g. landslide or avalanche) occurs.
Not applicable for US WEA
44071137 Non-ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is wind (e.g. tornado or gale) occurs.
Not applicable for US WEA
44081138 Non-ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is dust (e.g. yellow dust or sandstorm) occurs.
Not applicable for US WEA
44091139 Non-ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is chemical hazard (e.g. radiation leak or toxic substance leak) occurs.
Not applicable for US WEA
4410113A Non-ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when an epidemic occurs.
Not applicable for US WEA
4411113B Non-ETWS CBS Message Identifier for test message dedicated to UEs with no user interface and with ePWS functionality.
Not applicable for US WEA
4412113C ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality.
Not applicable for Japan ETWS
4413113D ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when an earthquake occurs.
Not applicable for Japan ETWS
4414113E ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a volcanic eruption occurs.
Not applicable for Japan ETWS
4415113F ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is water (e.g. flood, typhoon, hurricane or tsunami) occurs.
Not applicable for Japan ETWS
44161140 ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is fire (e.g. forest fire or building fire) occurs.
Not applicable for Japan ETWS
44171141 ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is pressure (e.g. landslide or avalanche) occurs.
Not applicable for Japan ETWS
44181142 ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is wind (e.g. tornado or gale) occurs.
Not applicable for Japan ETWS
44191143 ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is dust (e.g. yellow dust or sandstorm) occurs.
Not applicable for Japan ETWS
44201144 ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when a disaster whose characteristic is chemical hazard (e.g. radiation leak or toxic substance leak) occurs.
Not applicable for Japan ETWS
44211145 ETWS CBS Message Identifier for warning message dedicated to UEs with no user interface and with ePWS functionality when an epidemic occurs.
Not applicable for Japan ETWS
44221146 ETWS CBS Message Identifier for test message dedicated to UEs with no user interface and with ePWS functionality.
Not applicable for Japan ETWS
4423 - 63991147 - 18FF Intended as PWS range in future versions of the present document.
These values shall not be transmitted by networks that are compliant to this version of this document. If a Message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
64001900 EU-Info Message Identifier for the local language as defined in ETSI TS 102 900 [32].
6401 - 409591901 - 9FFF Intended for standardization in future versions of this document . These values shall not be transmitted by networks that are compliant to this version of this document. If a Message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message.
40960 - 45055A000 - AFFF PLMN operator specific range. The type of information provided by PLMN operators using these Message Identifiers is not guaranteed to be the same across different PLMNs. If a Message Identifier from this range is in the "search list", the ME shall attempt to receive this CBS message. The MS shall discard messages in this MI value range unless received from HPLMN, EHPLMN or PLMN that is equivalent to HPLMN or EHPLMN.
45056 - 61439B000 - EFFF Intended as PLMN operator specific range in future versions of this document. These values shall not be transmitted by networks that are compliant to this version of this document. If a Message Identifier from this range is in the "search list", then the ME shall attempt to receive this CBS message.
61440 - 65534F000 - FFFE Intended as PLMN operator specific range in future versions of this document. These values shall not be transmitted by networks that are compliant to this version of this document. If a Message Identifier from this range is in the "search list", then the ME shall attempt to receive this CBS message.
Not settable by MMI.
65535FFFF Reserved, and should not be used for new services, as this value is used on the SIM to indicate that no Message Identifier is stored in those two octets of the SIM. If this Message Identifier is in the "search list", the ME shall attempt to receive this CBS message.
Not settable by MMI.
Generally, the MMI for entering any Message in the ME is left to the manufacturers' discretion. However, the codes allowed to be set by MMI in the table above shall be capable of being specified via their decimal representation i.e.:
Octet 3 Octet 4
0000 00000000 0000(decimal '000')
0000 00000000 0001(decimal '001')
0000 00000000 0010(decimal '002')
0000 00000000 0011(decimal '003')
:::
0000 11111111 1111(decimal '4095')
0001 00010000 0000(decimal '4352')
:::
0001 00010001 0001(decimal '4369')
0001 00010001 0011(decimal '4371')
:::
0001 00010001 1110(decimal '4382')
0001 00010010 0000(decimal '4384')
:::
1110 11111111 1111(decimal '61439')
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9.4.1.2.3  Data Coding SchemeWord‑p. 80
This parameter indicates the intended handling of the CBS message at the MS, the alphabet/coding, and the language (when applicable). This is defined in TS 23.038.
When the SIM indicates one or more language preferences, the ME shall, by default, use the language(s) stored in the SIM (in the EFPL file) to set any language filter mechanisms provided by the ME.
Optionally, when allowed by language code processing specified below, the user can select the language(s) required by using an MMI, to determine whether a particular CBS message should be displayed.
Where the message relates to a public warning system, the Message Identifier values 4370 through 4382, 4396 and 4398 relate to warning messages delivered in languages which are mandatory to receive. The ME shall not use any language filter mechanisms or use the language(s) selected through the MMI to determine whether a particular CBS message should be displayed for these Message Identifier values. This does not affect the ability to set a particular message identifier by MMI.
Where the message relates to a public warning system, the Message Identifier values 4383 through 4395, 4397 and 4399 relate to warning messages delivered in languages which are optional to receive. For these values, the ME can use language filter mechanisms and the MS may use the language(s) selected through the MMI to determine whether a particular CBS message should be displayed. Even if the Message Identifier is not settable by MMI, the message shall still be discarded if the language is not set to be displayed.
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9.4.1.2.4  Page ParameterWord‑p. 81
This parameter is coded as two 4-bit fields. The first field (bits 0 3) indicates the binary value of the total number of pages in the CBS message and the second field (bits 4 7) indicates binary the page number within that sequence. The coding starts at 0001, with 0000 reserved. If a mobile receives the code 0000 in either the first field or the second field then it shall treat the CBS message exactly the same as a CBS message with page parameter 0001 0001 (i.e. a single page message).
9.4.1.2.5  Content of Message
This parameter is a copy of the 'CBS-Message-Information-Page' as sent from the CBC to the BSC.

9.4.1.3  ETWS Primary Notification message |R8|

9.4.1.3.1  General Description
The ETWS Primary Notification message is transmitted to a MS in idle mode and dedicated mode as described in TS 44.018, and to a MS in packet transfer mode as described in TS 44.060. The ETWS Primary Notification message is structured as in the table in subclause 9.4.1.3.2.
This message is only applicable in GSM.
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9.4.1.3.2  Message Parameter
Octet Number(s) Field
1-2Serial Number
3-4Message Identifier
5-6Warning Type
7-56Warning Security Information
The octets in the above table are transmitted in order, starting with octet 1. The bits within these octets are numbered 0 to 7; bit 0 is the low order bit and is transmitted first.
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9.4.1.3.3  Serial Number
This parameter identifies a particular ETWS Primary Notification message from the source and type indicated by the Message Identifier and is altered every time the ETWS Primary Notification message with a given Message Identifier is changed. The coding of this parameter is same as that defined in subclause 9.4.1.2.1.
9.4.1.3.4  Message IdentifierWord‑p. 82
This parameter identifies the source and type of the ETWS Primary Notification message. The coding of this parameter is same as that defined in subclause 9.4.1.2.2.
9.4.1.3.5  Warning Type
This parameter identifies the warning type of the ETWS Primary Notification message. It is identical with the Warning Type described in subclause 9.3.24 with respect to its structure and possible value range.
9.4.1.3.6  Warning Security Information
This parameter identifies the warning security information of the ETWS Primary Notification message. The coding of this parameter is same as that defined in subclause 9.3.25. The UE shall ignore this parameter.

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