Feature Description

SMF currently detects priority calls (WPS) based on ARP. To use QCI in addition to ARP for WPS calls, SMF supports 5QI Remapping functionality to enable mapping of nonstandard QCI with the standard QCI, which UE can understand.

The SMF facilitates the following functions:

  • Seamless handover to 4G: The SMF remaps the QCI sent in a mapped EPS QoS parameter with a mapped EPS bearer context to the configured value.

  • Seamless handover to 5G: The SMF remaps the QCI sent in QoS Flow description in the protocol configuration option in the Create Session Response, Create Bearer Request, and Update Bearer Request.