How it Works
SMF selects NFs, such as PCF, CHF, UDM, and AMF through the static configuration or NRF-based dynamic selection. In both these options, the messaging includes the slice information that is used in those interfaces.
SMF performs the following tasks:
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Register slice with NRF.
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Receive slice information on the N11 and N10 interfaces.
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Use slice for peer NF discovery and UPF selection.
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Send slice information on the N7 and N40 interfaces.