The requirements for Public Warning System were specified from 3GPP Release 8 onwards in order to provide a text-based and language-dependent PWS message to mobile users who have conventional mobile devices that were normally assumed in 3GPP technical specifications, i.e. PWS-UEs that can display a text-based and language-dependent PWS message, over 3GPP system.
It is recently recognised that mobile devices with different or no user interface or with different roles (e.g. devices implemented as wrist bands with a tiny screen and a limited or no user interface, sensors that support a simple functionality such as the control for power on/off, or mobile devices with relay functionality) are on the market. In addition, as 5G brings the connected society with the application of the 3GPP system to non-ICT industry businesses, the number of such mobile devices in the market is expected to increase in the near future.
Such changes in the market of mobile devices make it necessary that existing PWS requirements in TS 22.268
are revisited to check whether they are applicable to such mobile devices.
In addition, the number of mobile users who internationally travel or live in other countries than their mother country without knowledge of the local language is increasing. So, other means than texts (e.g. globally standardised graphical symbols or images that are mapped to disasters or any event triggering to disseminate a PWS message) might be much more powerful and efficient to let such mobile users recognise what is happening from the PWS message they receive.
Mobile devices may have accessibility capabilities that help mobile users with disabilities (e.g. people with vision impairment) understand text-based and language-dependent PWS messages. PWS messages may also supplement current PWS content with additional content tailored to the needs of users with disabilities. Therefore, it seems desirable to identify the necessity of new or additional requirements for the improvement of the comprehension of the PWS message.
The present document describes new use cases and potential requirements applicable to Public Warning Services for
UEs with diverse form-factors whose user interface is different from the conventional mobile phones; and
UEs that are defined by applying 3GPP system to non-ICT industry businesses (e.g. vehicles or machines such as IoT devices or robots) and have the different UE role from what 3GPP has traditionally assumed.
In addition, it considers the improvement of the understandability of the PWS message e.g. displaying language independent or graphical content to users, especially foreigners who might not understand the language used in the text or people with physical disability who may be sight impaired and unable to read the text. So it deals with user interface related potential requirements to address the presentation of the warning message considering circumstances such as language being used (e.g. international roaming scenario where the user does not understand the local language) or users with disability (e.g. people with vision impairment).
The present document does not cover use cases or potential requirements for US WEA and Japan ETWS so the results of this document are not applicable for US and Japan. This document considers national variants of EU-Alert and KPAS related service scenarios and potential requirements.