Expanded Prioritization for VoLTE/VoNR/Emergency Calls

The SMF+PGW-C supports Expanded Prioritization for VoLTE/VoNR/Emergency calls. The National Security/Emergency Preparedness (NS/EP) Next Generation Network (NGN) Priority Services (NGN-PS) (formerly called NGN Government Emergency Telecommunications Service (GETS)) is a set of voice, video and data services that are based on services available from public packet-switched Service Providers. The NS/EP NGN-PS provides priority treatment for a Service User’s NS/EP communications and is particularly needed when the Service Providers’ networks are impaired due to congestion and/or damage from natural disasters (such as floods, earthquakes and hurricanes) and man-made disasters (such as physical, cyber or other forms of terrorist attacks).

As part of this feature, the PGW-C control message is marked with DSCP marking and also for control message belonging to the eMPS session or containing Allocation and Retention Priority (ARP) associated with the eMPS profile.