CHF Selection

The CHF selection, that is, CHF address determination by the SMF is performed during PDU Session Establishment. This selection is based on the following in order of priority:

  1. PCF provides one or more CHF addresses as part of the PCC rule.

  2. UDM-provided charging characteristics.

  3. NRF-based discovery.

  4. SMF locally provisioned charging characteristics.

Note

The local configuration is currently used to get CHF IP/port.