8 Korean Public Alert System specific Requirements

22.2683GPPPublic Warning System (PWS) requirementsRelease 18TS

8.1 Introduction to Korean Public Alert System

TTA has specified a Korean Public Alert System (KPAS) which is based on PWS in [7]. That specification includes the support of Korean Public Alert System (KPAS) messages via the LTE Warning Message Delivery functionality. The Korean Public Alert System (KPAS) specification [7] also specifies application layer functionality to handle the transmission of CBS data from CBE to CBC and support for transmission of the same public alert message to UEs belonging to different mobile network operators in Republic of Korea. The specification requires that the system supporting Korean Public Alert System (KPAS) shall transmit the public alert message with high priority in order to provide up-to-date information on emergency situations. (e.g. In Tsunami situation, it is recommended to deliver message between CBC and UE in several seconds.).

8.2 Additional PWS Requirements Specific to Korean Public Alert System (KPAS)

In addition to the General Requirements specified in Clause 4, the following requirements are specified for the Korean Public Alert System (KPAS) [7]:

– Two classes of Warning Notification shall be supported; class 0 & class 1.

– The classes are differentiated per opt-out function. Class 0 shall have no opt-out and class 1 shall allow opt-out by the user.

Different types of Warning Notification shall be supported: Extreme Emergency, Emergency, Public Safety, and Amber. The Extreme Emergency type Warning Notifications are defined as class 0 and the other types are defined as class 1.

The characteristics of the Warning Notification shall follow the requirements specified in clause 4.

The current implementation requirement is for the message of up to 90 characters text. In addition, Warning Notifications using the UCS2 coding scheme [9] shall support up to 157 characters and Warning Notifications using the GSM 7 bit Default Alphabet coding scheme [9] shall support up to 360 characters from LTE onwards.

KPAS shall support Warning Notifications in various languages. If a Warning Notification is received in a language other than Korean, then it shall only be displayed by the UE if the user has selected that language.

A PWS-UE shall display Warning Notifications whose first texts are dedicated words when a PWS-UE receives Warning Notifications in other languages than Korean.

NOTE 1: Dedicated words are specified in the regulations of Korean Ministry of Interior and Safety.

A PWS-UE in KPAS shall support two dedicated alerting indication (audio attention signals).

NOTE 2: Two dedicated audio attention signals are specified in the regulations of Korean Ministry of Interior and Safety.

Warning Notifications may contain URLs and/or phone numbers. A UE shall allow the user to navigate to the URL or initiate a voice call to the phone number which may be included in the Warning Notification.