ETSI TS 122 268 V15.2.0 (2018-10)

Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); Public Warning System (PWS) requirements (3GPP TS 22.268 version 15.2.0 Release 15)

RTS/TSGS-0122268vf20

General Information

• Status: Published
• Publication Date: 03-Oct-2018
• Technical Committee: 3GPP SA 1 - Services
• Current Stage: 12 - Completion
• Completion Date: 04-Oct-2018

Standards Content (Sample)

ETSI TS 122 268 V15.2.0 (2018-10)






TECHNICAL SPECIFICATION
Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS);
Public Warning System (PWS) requirements
(3GPP TS 22.268 version 15.2.0 Release 15)

R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS

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3GPP TS 22.268 version 15.2.0 Release 15 1 ETSI TS 122 268 V15.2.0 (2018-10)



Reference
RTS/TSGS-0122268vf20
Keywords
GSM,UMTS
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3GPP TS 22.268 version 15.2.0 Release 15 2 ETSI TS 122 268 V15.2.0 (2018-10)
Intellectual Property Rights
Essential patents
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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
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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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3GPP TS 22.268 version 15.2.0 Release 15 3 ETSI TS 122 268 V15.2.0 (2018-10)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 4
1 Scope . 5
2 References . 5
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 6
4 General PWS Requirements . 6
4.1 Background . 6
4.2 High level general requirements for Warning Notification delivery . 6
4.3 Warning Notification Content . 7
4.4 Granularity of the distribution . 7
4.5 Support of Warning Notification Providers . 7
4.6 PWS-UE Requirements . 8
4.6.1 General Requirements . 8
4.6.2 Support of non-Warning Notification capable UEs . 8
4.6.3 Battery Life of PWS-UE . 8
4.6.4 Enabling and disabling of Warning Notifications . 8
4.7 Roaming Requirements . 9
4.8 Security Requirements . 9
4.9 Regulatory Requirements . 9
5 Earthquake and Tsunami Warning System . 9
5.1 Background . 9
5.2 Duration of delivery time . 10
5.3 Information element and volume . 10
5.4 Priority . 10
5.5 Roaming users . 11
6 CMAS Specific Requirements . 12
6.1 Introduction to CMAS . 12
6.2 Additional PWS Requirements Specific to CMAS . 12
7 EU-ALERT Specific Requirements . 13
7.1 Introduction to EU-ALERT . 13
7.2 Additional PWS Requirements Specific to EU-ALERT . 13
8 Korean Public Alert System specific Requirements . 14
8.1 Introduction to Korean Public Alert System . 14
8.2 Additional PWS Requirements Specific to Korean Public Alert System (KPAS) . 14
Annex A (informative): Change history . 16
History . 17

ETSI

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3GPP TS 22.268 version 15.2.0 Release 15 4 ETSI TS 122 268 V15.2.0 (2018-10)
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.
ETSI

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3GPP TS 22.268 version 15.2.0 Release 15 5 ETSI TS 122 268 V15.2.0 (2018-10)
1 Scope
This Technical Specification defines the stage one description of the Public Warning System (PWS) Requirements.
Stage one is the set of requirements seen primarily from the users’ and service providers’ points of view.
The scope of this TS covers the core requirements for the PWS that are sufficient to provide a complete service. This
TS also covers subsystem additional requirements for the Earthquake and Tsunami Warning System (ETWS) and the
Commercial Mobile Alert System (CMAS).
This TS includes information applicable to network operators, service providers, terminal and network manufacturers,
in case of deployment of PWS, ETWS, and or CMAS. PWS, ETWS and CMAS deployment depends on operator
decision or national regulations.
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] FCC 08-99: "Federal Communications Commission First Report and Order In the Matter of The

Commercial Mobile Alert System"; April 9, 2008.
[2] FCC 08-164: "Federal Communications Commission Second Report and Order and Further Notice
of Proposed Rulemaking In the Matter of The Commercial Mobile Alert System"; July 8, 2008.
[3] FCC 08-184: "Federal Communications Commission Third Report and Order and Further Notice
of Proposed Rulemaking In the Matter of The Commercial Mobile Alert System"; August 7, 2008.
[4] J-STD-100: "Joint ATIS/TIA-CMAS Mobile Device Behavior Specification"; January 30, 2009.
[5] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[6] ETSI TS 102 900: "European Public Warning System (EU-ALERT) using the Cell Broadcast
Service".
[7] TTA TTAK.KO-06.0263:"Korean Public Alert System over LTE network".
[8] FCC 16-127, Federal Communications Commission Report and Order and Further Notice of
Proposed Rulemaking In the Matter of Wireless Emergency Alerts Amendments to Part 11 of the
Commission’s Rules Regarding the Emergency Alert System; September 29, 2016.
[9] 3GPP TS 23.038; "Alphabets and language-specific information"
[10] FCC 18-4, Federal Communications Commission Second Report and Order and Second Order on
Reconsideration In the Matter of Wireless Emergency Alerts and Amendments to Part 11 of the
Commission’s Rules Regarding the Emergency Alert System; January 30, 2018
[11] 3GPP TS 22.071: “Location Services (LCS); Service description; Stage 1”
ETSI

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3GPP TS 22.268 version 15.2.0 Release 15 6 ETSI TS 122 268 V15.2.0 (2018-10)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in TR 21.905 [5] and the following apply. A
term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [5].
Commercial Mobile Alert System (aka, Wireless Emergency Alert): Public Warning System that delivers Warning
Notifications provided by Warning Notification Providers to CMAS capable PWS-UEs. CMAS defines the following
classes of Warning Notifications: Presidential, Imminent Threat, Public Safety, Child Abduction Emergency, and
State/Local WEA Test.
Earthquake and Tsunami Warning System: Public Warning System that delivers Warning Notifications specific to
Earthquake and Tsunami provided by Warning Notification Providers to the UEs which have the capability of receiving
Primary and Secondary Warning Notifications within Notification Areas through the 3GPP network
Notification Area: area where Warning Notifications are broadcast. This is an area that closely approximates the
geographical information provided by the Warning Notification Provider
PWS-UE: User Equipment (UE) which has the capability of receiving Warning Notifications within Notification Areas
through the 3GPP network and conforms to the behaviour specific to the PWS service such as dedicated alerting
indication and display of the Warning Notification upon reception
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in TR 21.905 [5] and the following apply. An
abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in
TR 21.905 [5]
CMAS Commercial Mobile Alert System
EOC Emergency Operations Center
ETWS Earthquake and Tsunami Warning System
KPAS Korean Public Alert System
PWS Public Warning System
WEA Wireless Emergency Alert

4 General PWS Requirements
4.1 Background
Recently there has been an interest to ensure that the public has the capability to receive timely and accurate alerts,
warnings and critical information regarding disasters and other emergencies irrespective of what communications
technologies they use. As has been learned from disasters such as earthquakes, tsunamis, hurricanes and wild fires; such
a capability is essential to enable the public to take appropriate action to protect their families and themselves from
serious injury, or loss of life or property.
This interest to enhance the reliability, resiliency, and security of Warning Notifications to the public by providing a
mechanism to distribute Warning Notifications over 3GPP systems is the impetus for this Public Warning System
Technical Specification.
4.2 High level general requirements for Warning Notification
delivery
The following list gives the high level general requirements for Warning Notification delivery:
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3GPP TS 22.268 version 15.2.0 Release 15 7 ETSI TS 122 268 V15.2.0 (2018-10)
- PWS shall be able to broadcast Warning Notifications to multiple users simultaneously with no
acknowledgement required.
- PWS shall be able to support concurrent broadcast of multiple Warning Notifications.
- Warning Notifications shall be broadcast to a Notification Area which is based on the geographical information
as specified by the Warning Notification Provider.
- PWS capable UEs (PWS-UE) in idle mode shall be capable of receiving broadcasted Warning Notifications.
Note: A bandwidth reduced low complexity UE or a UE supporting eDRX may not support all requirements for
PWS, including ETWS, CMAS, EU-Alert and KPAS
- PWS shall only be required to broadcast Warning Notifications in languages as prescribed by regulatory
requirements.
- Warning Notifications are processed by PWS on a first in, first out basis, subject to regulatory requirements.
- Reception and presentation of Warning Notifications to the user shall not pre-empt an active voice or data
session.
- Warning Notifications shall be limited to those emergencies where life or property is at imminent risk, and some
responsive action should be taken.
NOTE: This requirement does not prohibit the use of the operator’s network (i.e. broadcast technology)
implemented for Warning Notifications to be used for commercial services.
4.3 Warning Notification Content
PWS shall not modify or translate the Warning Notification content specified by the Warning Notification Provider.
It is expected that Warning Notifications would likely include the following five elements:
- Event Description
- Area Affected
- Recommended Action
- Expiration Time (with time zone)
- Sending Agency
Additional elements may be present, based on regulatory requirements.
There is a concern that URLs or telephone numbers in a Warning Notification could exacerbate wireless network
congestion at a time when network traffic is already dramatically increasing as individuals contact police, fire, and
rescue personnel, as well as their loved ones. Therefore, Warning Notifications should not contain anything that would
drive immediate and debilitating traffic loads into the PLMN (i.e., URLs or dialable numbers) unless required by
regional regulation.
4.4 Granularity of the distribution
Requirements for the granularity of the distribution of Warning Notifications include:
- Based on the geographical information indicated by the Warning Notification Provider, it shall be possible for
the PLMN operators to define the Notification Area based on their network configuration of the area coverage
such as distribution of cells, Node Bs, RNCs, etc.
4.5 Support of Warning Notification Providers
PLMN operators shall, at a minimum, be able to support the following functionalities through interaction with Warning
Notification Providers:
- Activation of Warning Notification delivery
It shall be possible for multiple Warning Notifications to be activated concurrently from one or more Warning
Notification Providers.
- Cancellation of Warning Notification delivery
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3GPP TS 22.268 version 15.2.0 Release 15 8 ETSI TS 122 268 V15.2.0 (2018-10)
A cancellation is a command from the Warning Notification Provider to stop dissemination of a specific
Warning Notification.
- Updating of Warning Notification delivery
Warning Notification Providers update a previous Warning Notification to provide new instructions/information
to the PLMN operator. When the Warning Notification Provider updates a previous Warning Notification they
provide an identifier that allows the PLMN operator to associate the updated Warning Notification with the
previous Warning Notification.
Additional functionality may be required based on regulatory or operator policy requirements.
4.6 PWS-UE Requirements
4.6.1 General Requirements
PWS-UEs shall only be required to receive and present Warning Notifications in languages as presented by the Warning
Notification Provider. Regional/regulatory requirements may require the Warning Notifications to be broadcast in
multiple languages.
There shall be no requirement for language translation in the operator’s network or the UE.
It shall be possible for the Warning Notification to be displayed on the PWS-UE upon reception and without any user
interaction.
It shall be possible for users to configure the behavior of a PWS-UE with regard to Warning Notification alerting and
should allow at least volume adjustment.
The PWS-UE shall support a dedicated alerting indication (audio attention signal and a dedicated vibration cadence)
and be distinct from any other device alerts and restricted to use for Warning Notification purposes. The User Interface
shall support the ability for the user to suppress the dedicated audio attention signal and/or the dedicated vibration
cadence when a Warning Notification is received.
The alerting indication for a specific Warning Notification shall continue until suppressed by users' manual operation
(e.g. by pushing keys). The frequency and duration of the continued alerting indication is mobile device implementation
specific. This shall not suppress the alerting indication for subsequent Warning Notifications.
The PWS-UE shall automatically suppress duplicate notifications. A duplicate is a repetition of a previous notification
as determined by unique parameters.
The PWS-UE shall not support any capabilities to forward received Warning Notifications, to reply to received
Warning Notifications, or to copy and paste the content of Warning Notifications.
PWS-UEs should have the ability to present previously displayed Warning Notifications if requested by the user.
- PWS-UE shall be able to support concurrent reception of multiple Warning Notifications.
4.6.2 Support of non-Warning Notification capable UEs
Support of non-Warning Notification capable UEs is subject to regulatory requirements and/or operator's policy.
4.6.3 Battery Life of PWS-UE
Battery life of the PWS-UE shall not be significantly reduced by PWS.
4.6.4 Enabling and disabling of Warning Notifications
The PWS-UE shall be configured to receive all Warning Notifications.
It shall be possible for users to disable (e.g., opt-out) presentation of some or all of the Warning Notifications, subject to
regulatory requirements and/or operator policy. The user shall be able to select PWS-UE enabling/disabling options via
the User Interface to disable, or later enable, the PWS-UE behavior in response to some or all Warning Notifications.
Depending on the regional/regulatory requirements, the user shall be able to receive Warning Notifications in one or
more selected languages.
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3GPP TS 22.268 version 15.2.0 Release 15 9 ETSI TS 122 268 V15.2.0 (2018-10)
Where regional or national regulations allow, the HPLMN operator shall be able to instruct the PWS-UE to ignore all
Warning Notifications in the HPLMN and in PLMNs equivalent to it, by means of a setting on the USIM.
Where regional or national regulations pertaining to a VPLMN allow, the HPLMN operator shall be able to instruct the
PWS-UE to ignore all Warning Notifications that are received whilst in this VPLMN, by means of a setting on the
USIM, when the integrity of Warning Notifications in this VPLMN is known by the HPLMN operator to be
compromised. This setting need not distinguish VPLMNs.
Subject to regional or national regulations, a PWS-UE in limited service state shall be able to receive and display Warning
Notifications.
NOTE 1: Non-existing or empty USIM data files results in all Warning Notifications being presented to the PWS
application.
NOTE 2: (void).
4.7 Roaming Requirements
It shall be possible for PWS-UEs that are enabled for Warning Notifications in the HPLMN to receive Warning
Notifications from the VPLMN supporting PWS when roaming.
A PWS-UE that does not support the PWS requirements of the VPLMN’s PWS service may not receive Warning
Notifications from that VPLMN.
NOTE: See section 4.9 for roaming impacts to PWS due to regional regulatory requirements.
4.8 Security Requirements
Security requirements are as follows:
- PWS shall only broadcast Warning Notifications that come from an authenticated authorized source.
The following requirements only apply when not roaming internationally:
- When required by regional or national regulations, the integrity of the Warning Notification shall be protected. If
no such regulatory requirement exists, there shall be no integrity protection of Warning Notifications, and all
Warning Notifications shall be presented to the PWS application on the PWS-UE.
- When required by regional or national regulations, the PWS shall protect against false Warning Notification
messages. If no such regulatory requirement exists, there shall be no protection against false Warning
Notifications, and all Warning Notifications shall be presented to the PWS application on the PWS-UE.
NOTE 1: These requirements are subject to regulatory policies.
NOTE 2: The authentication and authorisation of the source are outside the scope of 3GPP Specifications.
4.9 Regulatory Requirements
The PWS offered by a PLMN may be subject to PWS regional regulatory requirements and thus, the PWS offered may
differ from PLMN to PLMN as well as from region to region within a PLMN.
5 Earthquake and Tsunami Warning System
5.1 Background
Warning Notifications are expected to be delivered to the users while satisfying the following requirements:
- Quick Warning Notification delivery after the occurrence of Earthquake or Tsunami.
Earthquake and Tsunami propagate very fast. The duration time between the actual occurrence of the disaster
and its arrival is very short. The order of the duration time is around seconds or minutes at most. Therefore the
Warning Notifications shall be delivered quickly to the users in the emergency impacted area so that they could
take any actions to escape from danger.
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3GPP TS 22.268 version 15.2.0 Release 15 10 ETSI TS 122 268 V15.2.0 (2018-10)
- Accurate Warning Notification delivery.
Warning Notification delivery urges the users to take the actions such as evacuation. Therefore, the Warning
Notification shall be delivered to the users accurately in the Notification Area and the content of Warning
Notification should be understandable for many types of users (i.e. impaired persons, foreigners).
5.2 Duration of delivery time
Duration of the delivery time for PLMN operators is the time from the receipt of the Warning Notification by the
PLMN operator, i.e. the edge of the 3GPP network, to the time that the Warning Notification is successfully delivered
to the UEs.
Provisioning of delivery of Primary and Secondary Notification may be required:
- Primary Notification shall be delivered within 4 seconds to the UE in the Notification Area even under
congestion situation.
- Secondary Notification is delivered to the users in the Notification Area even under congestion situation.
NOTE 1: UEs that are out of coverage or switched off are not considered in the requirements.
NOTE 2: Secondary Notification may not always be generated as it depends on the Warning Notification
Provider’s policy.
NOTE 3: Primary Notification may not always be generated (i.e. the warning ma
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