Feature Description
EPS Interworking through 5G Core Network
SMF supports modification of EPS bearer that a PCF or an MME initiates. The SMF+PGW handles the following triggers for this feature:
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QoS modifications.
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RAT, ULI, and SGW modifications.
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UE time zone modifications.
SMF Interworking with Diameter Interfaces
SMF supports modification of EPS bearer for the tracking area update information through the following features:
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PCRF-initiated RAR
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E-UTRAN PDN modification with S-GW change
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E-UTRAN PDN modification without S-GW change