How it Works
The SMF integrates the CHF and PCF functions based on the following information:
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Policy control request triggers—received in the SM policy decision during
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PDU session establishment or
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PCF or UE initial modification
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Session-level or rating-group-level charging triggers—received during
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PDU session establishment or
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in response to
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SMF-initiated Charging Update Request
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CHF-initiated Charging Update Notify Request
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The SMF supports the following access-side information to detect the PCF and CHF triggers. The SMF sends the trigger information to the CHF and PCF during the N2-based handover.
Access-Side |
CHF-Triggers |
PCF-Triggers |
---|---|---|
UserLocation |
USER_LOCATION_CHANGE |
SAREA_CH |
UeTimeZone |
UE_TIMEZONE_CHANGE |
SAREA_CH |
ServingNetwork |
PLMN_CHANGE |
PLMN_CH |
TargetServingNfId |
SERVING_NODE_CHANGE |