SMF Support for Load Control Feature
3GPP specifies Load Control feature as optional feature over N4 reference points. This enables UPF to send its load information to CP functions. To support Load Control feature, SMF can receive UPF provided Load Control information in the following PFCP messages:
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Session Establishment Response
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Session Modification Response
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Session Deletion Response
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Session Report Request
Load Control procedure details are mentioned in 3GPP TS 29.244 v14.0.0 Release 14, section 6.2.3 and SMF adheres to the CP functionality.