Public Warning System (PWS) is generalization of Earthquake and Tsunami Warning System (ETWS). The requirements for PWS has been defined in 3GPP Release 9 in 3GPP TS 22.268. 3GPP TR 22.968 details the Study for requirements for a Public Warning System (PWS) service.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhdprAi-JtPobRFq6t5EK6fgbke7P2JLvsBqEbgdN3WEWCpcBZWF3NfDxbmimhps_BbQscp3RGby0vkTDyJpO04D-E_OSQj3vBBmZ2Aon5751skq8i2qc56uEh16g70llD_VpS__MnWvAg/s1600/PWS.jpg)
The following list gives the high level general requirements for Warning Notification delivery:
- PWS shall be able to broadcast Warning Notifications to multiple users simultaneously with no acknowledgement required.
- 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.
- 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.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGNK7gy11EubN19EA-tXKSCEZN70M-bGI9Gptxs6Otq0EHfhQt97uBoQbXjM8BvHH-g1i02vjpt5ddEitAytLNr0TtpueFPECXnvaDDxRxLczsU3Eg2JZcG9AxKqQooSbOdEBFS2uPIbo/s640/CMAS.jpg)
Commercial Mobile Alert System (CMAS) is Public Warning System (PWS) that delivers Warning Notifications provided by Warning Notification Providers to CMAS capable PWS-UEs. CMAS defines three different classes of Warning Notifications (Presidential, Imminent Threat and Child Abduction Emergency). The CMAS functionality does not require modifications to the 3GPP-defined cell broadcast functionality.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhdprAi-JtPobRFq6t5EK6fgbke7P2JLvsBqEbgdN3WEWCpcBZWF3NfDxbmimhps_BbQscp3RGby0vkTDyJpO04D-E_OSQj3vBBmZ2Aon5751skq8i2qc56uEh16g70llD_VpS__MnWvAg/s1600/PWS.jpg)
The following list gives the high level general requirements for Warning Notification delivery:
- PWS shall be able to broadcast Warning Notifications to multiple users simultaneously with no acknowledgement required.
- 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.
- 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.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGNK7gy11EubN19EA-tXKSCEZN70M-bGI9Gptxs6Otq0EHfhQt97uBoQbXjM8BvHH-g1i02vjpt5ddEitAytLNr0TtpueFPECXnvaDDxRxLczsU3Eg2JZcG9AxKqQooSbOdEBFS2uPIbo/s640/CMAS.jpg)
Commercial Mobile Alert System (CMAS) is Public Warning System (PWS) that delivers Warning Notifications provided by Warning Notification Providers to CMAS capable PWS-UEs. CMAS defines three different classes of Warning Notifications (Presidential, Imminent Threat and Child Abduction Emergency). The CMAS functionality does not require modifications to the 3GPP-defined cell broadcast functionality.
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