7 EU-ALERT Specific Requirements

22.2683GPPPublic Warning System (PWS) requirementsRelease 18TS

7.1 Introduction to EU-ALERT

The generic name for the European Public Warning System is EU-ALERT. The letters EU will be replaced by characters identifying a particular country (e.g. NL-ALERT signifying the Netherlands, UK-ALERT signifying the United Kingdom). Such a strategy will allow each country to configure their own Public Warning System to meet their specific national requirements whilst adhering to a common core specification.

7.2 Additional PWS Requirements Specific to EU-ALERT

In addition to the General Requirements specified in Clause 4, the following requirements are specified for the deployment of EU-ALERT. These EU-ALERT specific requirements are further specified in ETSI TS 102 900 [6].

EU-ALERT shall support three types of Warning Notifications: Alert messages to warn citizens of an imminent emergency situation, Advisory messages of lesser urgency, and Amber alerts.

The Alert messages shall be supported with three levels of severity. EU-Alert level 1 shall have no opt-out; levels 2 and 3 shall allow opt-out by the user. All levels of EU-ALERT messages shall be associated with a dedicated alerting indication.

NOTE: EU-Alert level 1 is compatible with the Presidential Alert in CMAS. EU-Alert level 2 is compatible with CMAS Extreme Alerts and EU-Alert level 3 is compatible with CMAS Severe Alert.

The Advisory messages have only one level. Advisory messages shall not be associated with any dedicated alerting indication.

Depending on national requirements, Amber alerts may need to be broadcast as part of the EU-ALERT service. Amber alerts shall not be associated with any dedicated alerting indication.

EU-ALERT shall support Warning Notifications in various languages. To support international roaming, it is expected that countries adopting EU-ALERT use the same Message Identifier for Warning Notifications in the local language. If Warning Notifications are broadcast in other languages besides the local language, then the Message Identifier for such Warning Notifications are expected to be the same across the countries adopting EU-ALERT.

EU-ALERT shall be supported on GERAN, UTRAN, E-UTRAN and NG-RAN.

EU-ALERT shall support that the PLMN broadcasting EU-ALERT Warning Notifications also broadcasts corresponding Warning Notification Area(s). This requirement applies only to E-UTRAN and NG-RAN.

A EU-ALERT-capable UE shall utilize UE-Based Location Calculation (see 3GPP TS 22.071 [11]) to determine whether it is located within the corresponding Warning Notification Area(s) in order to minimize overloading network LCS resources.

Subject to opt-out and opt-in settings described above, a EU-ALERT-capable UE shall present the EU-ALERT Warning Notification sent if there is a corresponding Warning Notification Area(s) and if the EU-ALERT-capable UE is able to determine that its location is within the corresponding Warning Notification Area(s). Otherwise, if a EU-ALERT-capable UE is unable to or fails to determine its location, the EU-ALERT-capable UE shall present the EU-ALERT Warning Notification to the user.