ETSI TS 129 168 V12.10.0 (2017-10)

Universal Mobile Telecommunications System (UMTS); LTE; Cell Broadcast Centre interfaces with the Evolved Packet Core; Stage 3 (3GPP TS 29.168 version 12.10.0 Release 12)

RTS/TSGC-0429168vca0

General Information

• Status: Published
• Publication Date: 01-Oct-2017
• Technical Committee: 3GPP CT 4 - MAP/CAMEL/GTP/BCH/SS/TrFO/IMS/GUP/WLAN (formely CN4)
• Current Stage: 12 - Completion
• Completion Date: 02-Oct-2017

Standards Content (Sample)

TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Cell Broadcast Centre interfaces with
the Evolved Packet Core;
Stage 3
(3GPP TS 29.168 version 12.10.0 Release 12)

3GPP TS 29.168 version 12.10.0 Release 12 1 ETSI TS 129 168 V12.10.0 (2017-10)

Reference
RTS/TSGC-0429168vca0
Keywords
LTE,UMTS
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3GPP TS 29.168 version 12.10.0 Release 12 2 ETSI TS 129 168 V12.10.0 (2017-10)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
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server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
http://webapp.etsi.org/key/queryform.asp.
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
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Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 5
1 Scope . 6
2 References . 6
3 Definitions, symbols and abbreviations . 7
3.1 Definitions . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 SBc description . 8
4.1 Transport . 8
4.1.1 General . 8
4.1.2 Network layer . 8
4.1.3 Transport layer . 8
4.1.4 Services expected from signalling transport . 8
4.2. SBc-AP functions . 8
4.2.1 Function of SBc-AP . 8
4.3 SBc-AP procedure . 9
4.3.1 General . 9
4.3.2 List of SBc-AP elementary procedure. 9
4.3.3 Write Replace Warning Procedure . 9
4.3.3.1 General . 9
4.3.3.2 Successful Operation . 10
4.3.3.3 Unsuccessful Operation . 10
4.3.3A Stop Warning Procedure . 11
4.3.3A.1 General . 11
4.3.3A.2 Successful Operation . 11
4.3.3A.3 Unsuccessful Operation . 11
4.3.3B Error Indication . 12
4.3.3B.1 General . 12
4.3.3B.2 Successful Operation . 12
4.3.3B.3 Abnormal Conditions . 12
4.3.3C Write Replace Warning Indication . 12
4.3.3C.1 General . 12
4.3.3C.2 Successful Operation . 13
4.3.3C.3 Abnormal Conditions . 13
4.3.3D Stop Warning Indication . 13
4.3.3D.1 General . 13
4.3.3D.2 Successful Operation . 13
4.3.3D.3 Abnormal Conditions . 13
4.3.3E PWS Restart Indication . 13
4.3.3E.1 General . 13
4.3.3E.2 Successful Operation . 14
4.3.4 Message functional definition and content . 14
4.3.4.1 Message contents . 14
4.3.4.1.1 Presence . 14
4.3.4.1.2 Criticality . 15
4.3.4.1.3 Range . 15
4.3.4.1.4 Assigned Criticality . 15
4.3.4.2 Warning Message Transmission Messages . 15
4.3.4.2.1 WRITE-REPLACE WARNING REQUEST . 15
4.3.4.2.2 WRITE-REPLACE WARNING RESPONSE . 16
4.3.4.2.3 STOP WARNING REQUEST . 16
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4.3.4.2.4 STOP WARNING RESPONSE . 17
4.3.4.2.5 WRITE REPLACE WARNING INDICATION . 17
4.3.4.2.6 STOP WARNING INDICATION . 18
4.3.4.2.7 PWS RESTART INDICATION . 18
4.3.4.2A Management Messages . 19
4.3.4.2A.1 ERROR INDICATION . 19
4.3.4.3 Information element definition. 19
4.3.4.3.1 Message Type . 19
4.3.4.3.2 Cause . 19
4.3.4.3.3 Criticality Diagnostics . 20
4.3.4.3.4 OMC ID . 21
4.3.4.3.5 Send Write-Replace-Warning-Indication . 21
4.3.4.3.6 Unknown Tracking Area List . 22
4.3.4.3.7 Send Stop Warning Indication . 22
4.3.4.3.8 Stop-All Indicator . 22
4.3.4.3.9 Broadcast Empty Area List. 22
4.4 Message and information element abstract syntax . 23
4.4.1 General . 23
4.4.2 Usage of protocol extension mechanism for non-standard use . 23
4.4.3 Elementary procedure definitions . 23
4.4.4 PDU definitions . 25
4.4.5 Information element definitions . 30
4.4.6 Common definitions . 35
4.4.7 Constant definitions . 36
4.4.8 Container Definitions . 37
4.4.9 Message transfer syntax . 40
4.5 Handling of unknown, unforeseen or erroneous protocol data . 40
4.5.1 General . 40
4.5.2 Transfer Syntax Error . 40
4.5.3 Abstract Syntax Error . 40
4.5.3.1 General . 40
4.5.3.2 Criticality information . 41
4.5.3.3 Presence information . 41
4.5.3.4 Not comprehended IE/IE group . 42
4.5.3.4.1 Procedure code . 42
4.5.3.4.2 Type of Message . 42
4.5.3.4.3 IEs other than the Procedure Code and Type of Message . 42
4.5.3.5 Missing IE or IE group . 43
4.5.3.6 IEs or IE groups received in wrong order or with too many occurrences or erroneously present . 44
4.5.4 Logical Error . 45
4.5.5 Exceptions . 45
Annex A (informative): Change history: . 46
History . 48

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Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
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1 Scope
The present document specifies the procedures and the SBc Application Part (SBc-AP) messages used on the SBc-AP
interface between the Mobility Management Entity (MME) and the Cell Broadcast Centre (CBC).
The present document supports the following functions.
- Warning Message Transmission function in the EPS.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] IETF RFC 2460 (December 1998): "Internet Protocol, Version 6 (IPv6) Specification".
[3] IETF RFC 791 (September 1981): "Internet Protocol".
[4] IETF RFC 4960 (September 2007): "Stream Control Transmission Protocol".
[5] Void
[6] Void
[7] 3GPP TS 36.413: "Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1
Application Protocol (S1AP)"
[8] ITU-T Recommendation X.680 (07/2002): "Information Technology - Abstract Syntax Notation
One (ASN.1): Specification of basic notation".
[9] ITU-T Recommendation X.681 (07/2002): "Information Technology - Abstract Syntax Notation
One (ASN.1): Information object specification".
[10] ITU-T Recommendation X.691 (07/2002): "Information Technology - ASN.1 encoding rules -
Specification of Packed Encoding Rules (PER)".
[11] 3GPP TS 29.002: "Mobile Application Part (MAP) specification".
[12] Void
[13] 3GPP TS 22.268: "Public Warning System (PWS) requirements".
[14] 3GPP TS 23.041: "Technical realization of Cell Broadcast Service (CBS)".
[15] Void
[16] 3GPP TS 23.007: "Restoration procedures".
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3 Definitions, symbols and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following
apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP
TR 21.905 [1].
Elementary Procedure: SBc-AP consists of Elementary Procedures (EPs). An Elementary Procedure is a unit of
interaction between MME and CBC. These Elementary Procedures are defined separately and are intended to be used to
build up complete sequences in a flexible manner. If the independence between some EPs is restricted, it is described
under the relevant EP description. Unless otherwise stated by the restrictions, the EPs may be invoked independently of
each other as stand alone procedures, which can be active in parallel. Examples on using several SBc-APs together with
each other and EPs from other interfaces can be found in reference [FFS].
An EP consists of an initiating message and possibly a response message. Two kinds of EPs are used:
- Class 1: Elementary Procedures with response (success and/or failure).
- Class 2: Elementary Procedures without response.
For Class 1 EPs, the types of responses can be as follows:
Successful:
- A signalling message explicitly indicates that the elementary procedure successfully completed with the
receipt of the response.
Unsuccessful:
- A signalling message explicitly indicates that the EP failed.
- On time supervision expiry (i.e. absence of expected response).
Successful and Unsuccessful:
- One signalling message reports both successful and unsuccessful outcome for the different included requests.
The response message used is the one defined for successful outcome.
Class 2 EPs are considered always successful.
3.2 Symbols
For the purposes of the present document, the following symbols apply:

Editor’s note: To be completed or section removed.
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply. An
abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in
3GPP TR 21.905 [1].
CMAS Commercial Mobile Alert System
CBC Cell Broadcast Center
CBS Cell Broadcast Service
EPC Evolved Packet Core
EPS Evolved Packet System
ETWS Earthquake and Tsunami Warning System
MME Mobility Management Entity
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PWS Public Warning System
SCTP Stream Control Transmission Protocol

4 SBc description
4.1  Transport
4.1.1 General
This subclause specifies the standards for signalling transport to be used across SBc-AP interface. SBc-AP interface is a
logical interface between the MME and the CBC. All the SBc-AP messages described in the present document require
an SCTP association between the MME and the CBC.
4.1.2 Network layer
The MME and the CBC shall support IPv6 (see IETF RFC 2460 [2]) and/or IPv4 (see IETF RFC 791 [3]).
The IP layer of SBc-AP only supports point-to-point transmission for delivering SBc-AP messages.
4.1.3 Transport layer
SCTP (see IETF RFC 4960 [4]) shall be supported as the transport layer of SBc-AP messages.
Semi-permanent SCTP associations shall be established between MME and CBC, i.e. the SCTP associations shall
remain up under normal circumstances.
Local multi-homing should be supported. Remote multi-homing shall be supported.
Multiple local SCTP endpoints may be supported. Multiple remote SCTP endpoints shall be supported. When multiple
local or remote SCTP endpoints are configured, several simultaneous SCTP associations shall be supported between
MME and CBC.
Checksum calculation for SCTP shall be supported as specified in RFC 4960 [4].
The CBC shall establish the SCTP association.
The registered port number for SBc-AP is 29168.
The registered payload protocol identifier for SBc-AP is 24.
4.1.4 Services expected from signalling transport
The signalling connection shall provide in-sequence delivery of SBc-AP messages. SBc-AP shall be notified if the
signalling connection breaks.
4.2. SBc-AP functions
4.2.1 Function of SBc-AP
SBc-AP has the following function:
- Warning Message Transmission function:
This functionality provides the means to start, overwrite and stop the broadcasting of warning message in
support of the Public Warning System (PWS) messages as defined in 3GPP TS 22.268 [13] which include
Commercial Mobile Warning System (CMAS) and Earthquake and Tsunami (ETWS) messages.
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4.3 SBc-AP procedure
4.3.1 General
This sub-clause describes the parameters and detailed behaviors of different procedures.
4.3.2 List of SBc-AP elementary procedure
Table 4.3.2-1 lists the SBc-AP Elementary Procedures defined as class 1 procedures.
Table 4.3.2-1: SBc-AP class 1 elementary procedures
Elementary Initiating Message Successful Outcome Unsuccessful Outcome
Procedure
Response message Response message
Write-Replace WRITE-REPLACE WRITE-REPLACE
Warning WARNING REQUEST WARNING RESPONSE
procedure
Stop Warning STOP WARNING STOP WARNING
Procedure REQUEST RESPONSE
Table 4.3.2-2 lists the SBc-AP Elementary Procedures defined as class 2 procedures.
Table 4.3.2-2: SBc-AP class 2 elementary procedures
Elementary Initiating Message
Procedure
Error Indication ERROR INDICATION
procedure
Write Replace WRITE REPLACE
Warning WARNING
Indication INDICATION
procedure
Stop Warning STOP WARNING
Indication INDICATION
procedure
PWS Restart PWS RESTART
Indication INDICATION
4.3.3 Write Replace Warning Procedure
4.3.3.1 General
The purpose of Write-Replace Warning procedure is to start, overwrite the broadcasting of warning message, as defined
in 3GPP TS 23.041 [14].
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4.3.3.2 Successful Operation
MME
CBC
WRITE-REPLACE WARNING REQUEST
WRITE-REPLACE WARNING RESPONSE

Figure 4.3.3.2-1: Write-Replace Warning procedure. Successful operation.
The CBC initiates the procedure by sending a WRITE-REPLACE WARNING REQUEST message to the MME.
Upon reception of WRITE-REPLACE WARNING REQUEST message, the MME shall forward the message towards
the eNBs which belong to the tracking area indicated in List of TAIs IE, if this list is present.
If a Global eNB ID IE is present in the WRITE-REPLACE WARNING REQUEST message, the MME shall forward
the message only towards the eNB identified by the Global eNB ID if this IE is supported by the MME. If the Global
eNB ID IE is not supported by the MME, the MME shall forward the WRITE-REPLACE WARNING REQUEST
message using the List of TAIs IE, if this list is present, otherwise the MME shall send the message towards all
connected (H)eNBs. An MME and a CBC which support the PWS Restoration procedures as specified in 3GPP TS
23.007 [16] subclause 15A.1 shall support the Global eNB ID IE.
If neither the List of TAIs IE, nor the Global eNB ID IE (if this is supported) are present in WRITE-REPLACE
WARNING REQUEST message, the MME shall forward the message towards all connected eNBs.
The MME shall return a WRITE-REPLACE WARNING RESPONSE to the CBC immediately after the reception of
the WRITE-REPLACE WARNING REQUEST message without waiting responses from eNBs.
The MME shall set the cause IE to ‘Message accepted’ in the WRITE-REPLACE WARNING RESPONSE message.
4.3.3.3 Unsuccessful Operation

MME
CBC
WRITE-REPLACE WARNING REQUEST
WRITE-REPLACE WARNING RESPONSE

Figure 4.3.3.3-1: Write-Replace Warning procedure. Unsuccessful operation.
The CBC initiates the procedure by sending a WRITE-REPLACE WARNING REQUEST message to the MME.
If MME cannot process the received WRITE-REPLACE WARNING REQUEST message, the MME shall return a
WRITE-REPLACE WARNING RESPONSE message towards the CBC and the MME shall not forward the message
towards the eNBs belonged to the tracking area as indicated in List of TAIs IE.
The MME shall indicate a reason of failure in the cause IE.
NOTE: An Unsuccessful Operation is reported as a Successful Outcome in the Response message. See subclause
3.1.
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4.3.3A  Stop Warning Procedure
4.3.3A.1 General
The purpose of Stop Warning Procedure is to stop the broadcasting of warning message.
4.3.3A.2 Successful Operation
MME
CBC
STOP WARNING REQUEST
STOP WARNING RESPONSE
Figure 4.3.3A.2-1: Stop Warning Procedure, Successful Operation.
The CBC initiates the Stop Warning Procedure by sending a STOP WARNING REQUEST message to the MME.
Upon reception of STOP WARNING REQUEST message, the MME shall forward the message towards the eNBs
belonged to the tracking area as indicated in List of TAIs IE.
If none of List of TAIs IE is present in STOP WARNING REQUEST message, the MME shall forward the message
towards all connected eNBs.
The MME shall return a STOP WARNING RESPONSE to the CBC immediately after the reception of the STOP
WARNING REQUEST message without waiting responses from eNBs.
The MME shall set the cause IE to ‘Message accepted’ in the STOP WARNING RESPONSE message.
4.3.3A.3 Unsuccessful Operation

MME
CBC
STOP WARNING REQUEST
STOP WARNING RESPONSE
Figure 4.3.3A.3-1: Stop Warning procedure, Unsuccessful operation.
The CBC initiates the Stop Warning Procedure by sending a STOP WARNING REQUEST message to the MME.
If MME cannot process the received STOP WARNING REQUEST message, the MME shall return a STOP
WARNING RESPONSE message towards the CBC and the MME shall not forward the message towards the eNBs
belonged to the tracking area as indicated in List of TAIs IE.
The MME shall indicate a reason of failure in the cause IE.
NOTE: An Unsuccessful Operation is reported as a Successful Outcome in the Response message. See subclause
3.1.
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4.3.3B Error Indication
4.3.3B.1 General
The Error Indication procedure is initiated by a node to report detected errors in one incoming message, provided they
cannot be reported by an appropriate failure message.
4.3.3B.2 Successful Operation
MME CBC
ERROR INDICATION
Figure 4.3.3B.2-1: Error Indication procedure, CBC originated. Successful operation.

MME CBC
ERROR INDICATION
Figure 4.3.3B.2-2: Error Indication procedure, MME originated. Successful operation.
When the conditions defined in subclause 4.5 are fulfilled, the Error Indication procedure is initiated by an ERROR
INDICATION message sent from the receiving node.
The ERROR INDICATION message shall contain at least either the Cause IE or the Criticality Diagnostics as indicated
in subclause 4.5.
4.3.3B.3 Abnormal Conditions
Not applicable.
4.3.3C Write Replace Warning Indication
4.3.3C.1 General
If supported by the MME, the Write-Replace-Warning-Indication message(s) shall be sent by the MME to report to the
CBC the Broadcast Scheduled Area List if the Send Write-Replace-Warning-Indication parameter was present in the
corresponding Write-Replace-Warning-Request. The Broadcast Scheduled Area List shall contain the Broadcast
Completed Area List the MME has received from the eNodeB(s) [7].
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4.3.3C.2 Successful Operation
MME CBC
WRITE REPLACE
WARNING
INDICATION
Figure 4.3.3C.2-1: Write Replace Warning Indication procedure, MME originated. Successful
operation.
The MME initiates the Write Replace Warning Indication procedure by sending a WRITE REPLACE WARNING
INDICATION message(s) to the CBC after it has previously received a Broadcast Completed Area List from
eNodeB(s) in a WRITE-REPLACE WARNING MESSAGE [7]. The MME may aggregate Broadcast Completed Area
Lists it receives from the eNodeBs.
4.3.3C.3 Abnormal Conditions
Not applicable.
4.3.3D Stop Warning Indication
4.3.3D.1 General
If supported by the MME, the Stop Warning Indication message(s) shall be sent by the MME to report to the CBC the
Broadcast Cancelled Area List if the Send Stop Warning Indication parameter was present in the corresponding Stop
Warning Request. The Broadcast Cancelled Area List shall contain the Broadcast Cancelled Area List the MME has
received from the eNodeB(s) [7].
4.3.3D.2 Successful Operation
MME CBC
STOP WARNING
INDICATION
Figure 4.3.3D.2-1: Stop Warning Indication procedure, MME originated. Successful operation.
The MME initiates the Stop Warning Indication procedure by sending a STOP WARNING INDICATION message to
the CBC after it has previously received a Broadcast Cancelled Area List from an eNodeB. The MME may aggregate
Broadcast Cancelled Area Lists it receives from the eNodeBs.
4.3.3D.3 Abnormal Conditions
Not applicable.
4.3.3E  PWS Restart Indication
4.3.3E.1 General
The PWS Restart Indication is sent by the MME to the CBC upon receipt of a PWS Restart Indication from an (H)eNB,
to indicate that the PWS service is restarted in one or more or all cells served by an (H)eNB, i.e. the service has become
operational and no warning message data is available for these cell(s). The CBC shall reload the cells if required.
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4.3.3E.2 Successful Operation
MME
CBC
PWS RESTART INDICATION
Figure 4.3.3E.2-1: PWS Restart Indication, Successful Operation.
The MME initiates the PWS Restart Indication procedure by sending a PWS RESTART INDICATION message to the
CBC upon receiving a PWS Restart Indication message from an (H)eNB (see TS 36.413 [7]).
The MME shall copy the following parameters from the PWS Restart Indication received from the (H)eNB into the
corresponding parameters in the PWS-RESTART-INDICATION towards the CBC:
- Global eNB ID of the (H)eNB;
- Reloaded E-CGI List into the Restarted-Cell-List;
- Tracking Area ID List;
- Emergency Area ID List (if received from the (H)eNB, i.e. if the restarted cell(s) are configured with Emergency
Area ID(s)).
Upon receipt of a PWS Restart Indication message, the CBC shall consider that the PWS service is restarted in the
reported cell(s), i.e. the service is operational and no warning messages are being broadcast in these cell(s). The CBC
shall then reload the warning message data to the (H)eNB for these cells, if any.
The CBC shall consider a PWS Restart Indication message received shortly after a preceding one for the same cell
identity as a duplicate restart indication for that cell which it shall ignore.
NOTE: The CBC can receive the same PWS Restart Indication message via two MMEs of the MME pool for
redundancy reasons (see subclause 15A.1 of 3GPP TS 23.007 [16]).
The CBC shall reload the warning message data (with the same Message Identifier and Serial Number) to the (H)eNB
by initiating Write Replace Warning procedure(s) as specified in subclause 4.3.3.2 with the following additions:
- the CBC should set the Warning Area List IE in the Write-Replace Warning Request message to the identities of
the cell(s) received in the Restarted-Cell-List which are relevant to the warning message data being reloaded;
- the CBC shall copy the Global eNB ID into the Write-Replace Warning Request message; and
- the CBC may update the Number of Broadcast Requested, if necessary.
4.3.3E.3 Abnormal Conditions
Not applicable.
4.3.4 Message functional definition and content
4.3.4.1 Message contents
4.3.4.1.1 Presence
All information elements in the message descriptions below are marked mandatory, optional or conditional according to
table 4.3.4.1.1-1.
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3GPP TS 29.168 version 12.10.0 Release 12 15 ETSI TS 129 168 V12.10.0 (2017-10)
Table 4.3.4.1.1-1: Meaning of abbreviations used in SBc-AP messages
Abbreviation Meaning
M
IEs marked as Mandatory (M) shall always be included in the
message.
O IEs marked as Optional (O) may or may not be included in the
message.
C IEs marked as Conditional (C) shall be included in a message only if
the condition is satisfied. Otherwise the IE shall not be included.

4.3.4.1.2 Criticality
Each Information Element or Group of Information Elements may have criticality information applied to it.
Following cases are possible:
Table 4.3.4.1.2-1: Meaning of content within "Criticality" column
Abbreviation Meaning
– No criticality information is applied explicitly.
YES Criticality information is applied. This is usable only for non-
repeatable IEs
GLOBAL The IE and all its repetitions together have one common criticality
information. This is usable only for repeatable IEs.
EACH Each repetition of the IE has its own criticality information. It is not
allowed to assign different criticality values to the repetitions. This is
usable only for repeatable IEs.

4.3.4.1.3 Range
The Range column indicates the allowed number of copies of repetitive IEs/IE groups.
4.3.4.1.4 Assigned Criticality
This column provides the actual criticality information as defined in subclause 4.5.3.2, if applicable.
4.3.4.2 Warning Message Transmission Messages
4.3.4.2.1 WRITE-REPLACE WARNING REQUEST
This message is sent by the CBC to request start or overwrite of a warning message broadcast.
Direction: CBC → MME
ETSI
3GPP TS 29.168 version 12.10.0 Release 12 16 ETSI TS 129 168 V12.10.0 (2017-10)
Table 4.3.4.2.1-1: WRITE-REPLACE WARNING REQUEST message contents
IE/Group Name Presence Range IE type and Semantics Criticality Assigned
reference description Criticality
Message Type M 4.3.4.3.1 YES reject
Message Identifier M [7] YES reject
Serial Number M [7] YES reject
List of TAIs O  YES reject
>TAI List Item 1 to

>>TAI M [7]
Warning Area List O [7] YES ignore
Repetition Period M [7] YES reject
Extended Repetition O [7] YES reject
Period
Number of Broadcast M [7] YES reject
Requested
Warning Type O [7] YES ignore
Warning Security O [7] YES ignore
Information
Data Coding Scheme O [7] YES ignore
Warning Message O [7] YES ignore
Contents
OMC ID O 4.3.4.3.4 YES ignore
Concurrent Warning O [7] YES reject
Message Indicator
Send Write-Replace- O 4.3.4.3.5 YES ignore
Warning-Indication
Global eNB ID O [7] YES ignore

Table 4.3.4.2.1-2: RANGE explanation
Range bound Explanation
maxnoofTAI Maximum no. of TAI subject for warning message broadcast. Value
is 65535.
4.3.4.2.2 WRITE-REPLACE WARNING RESPONSE
This message is sent by the MME to acknowledge the CBC on the start or overwrite request of a warning message.
Direction: MME → CBC
Table 4.3.4.2.2-1: WRITE-REPLACE WARNING RESPONSE message contents
IE/Group Name Presence Range IE type and Semantics Criticality Assigned
reference description Criticality
Message Type M 4.3.4.3.1 YES reject
Message Identifier M [7] YES reject
Serial Number M [7] YES reject
Cause M 4.3.4.3.2 YES ignore
Criticality Diagnostics O 4.3.4.3.3 YES ignore
Unknown Tracking Area O 4.3.4.3.6 YES ignore
List
4.3.4.2.3 STOP WARNING REQUEST
This message is sent by the CBC to stop a warning message broadcast.
Direction: CBC → MME
ETSI
3GPP TS 29.168 version 12.10.0 Release 12 17 ETSI TS 129 168 V12.10.0 (2017-10)
Table 4.3.4.2.3-1: STOP WARNING REQUEST message contents
IE/Group Name Presence Range IE type and Semantics Criticality Assigned
reference description Criticality
Message Type M 4.3.4.3.1 YES reject
Message Identifier M [7] YES reject
Serial Number M [7] YES reject
List of TAIs O  YES reject
>TAI List Item 1 to

>>TAI M [7]
Warning Area List O [7] YES Ignore
OMC ID O 4.3.4.3.4 YES ignore
Send Stop Warning O 4.3.4.3.7 YES ignore
Indication
Stop-All Indicator O 4.3.4.3.8 YES reject

Table 4.3.4.2.1-2: RANGE explanation
Range bound Explanation
maxnoofTAI Maximum no. of TAI subject for warning message broadcast. Value
is 65535.
4.3.4.2.4 STOP WARNING RESPONSE
This message is sent by the MME to acknowledge the CBC on the stop request of a warning message.
Direction: MME → CBC
Table 4.3.4.2.2-1: STOP WARNING RESPONSE message contents
IE/Group Name Presence Range IE type and Semantics Criticality Assigned
reference description Criticality
Message Type M 4.3.4.3.1 YES reject
Message Identifier M [7] YES reject
Serial Number M [7] YES reject
Cause M 4.3.4.3.2 YES ignore
Criticality Diagnostics O 4.3.4.3.3 YES ignore
Unknown Tracking Area O 4.3.4.3.6 YES ignore
List
4.3.4.2.5 WRITE REPLACE WARNING INDICATION
This message is sent by the MME to report to the CBC the Broadcast Scheduled Area List(s) the MME has received
from the eNodeB(s) as Broadcast Completed Area List in a WRITE-REPLACE WARNING RESPONSE [7]. Multiple
responses from eNodeBs may be combined in a Broadcast Scheduled Area List.
The Broadcast Scheduled Area List IE is only included in the WRITE-REPLACE WARNING INDICATION when the
broadcast is successful in at least one ce
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