The present document investigates possible enhancements to the Warning Status Reporting mechanisms specified up to release 12 in TS 23.041. The study will cover:

• identification of requirements for Warning Status reporting;
• identification and evaluation of alternatives for Warning Status reporting;
• analysis on their potential interactions with the existing mechanisms; and
• recommendations on the alternatives.

The result of this study will be used to identify the changes possibly required in the 3GPP specifications to support enhanced Warning Status reporting mechanisms.

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.

Message originators (mobile network operators as well as government authorities that want to broadcast Public Warning Messages) require knowing if warning the population is likely to be successful, or if alternative means of warning citizens need to be considered. Mobile operators require knowing if they fulfil the service requirements and have actually broadcasted Warning Messages to citizens. The following requirements shall be considered for enhanced Warning Status Reporting:

1. It shall be possible for the CBC to report, for each cell in the Warning Area, the number of broadcasts actually performed;
2. It shall be possible for the CBC to report whether the cells in a Warning Area are available or not available for PWS.