Final Unit Indication Support
The SMF supports Final Unit Indication (FUI) in the Charging Data Initial or Update Response from CHF as per 3GPP TS 32.291, section 6.1.6.2.1.12.
On receiving FUA, the SMF installs new FAR and associates its FAR-ID in the URR, in the FAR ID Quota Action IE. If a FAR with same parameters exists, the SMF uses its FAR-ID in the Create or Update URR. The UPF initiates appropriate actions set in FAR after quota exhaustion.
Currently, the SMF only supports Terminate and Redirect FU actions.

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