Feature Description
Important | The PGW-C term used in this chapter denote the EPS interworking functionality supported by SMF and must not be assumed as a standalone P-GW that is used in the LTE network. |
The SMF+PGW-C product supports Wi-Fi handovers. The cloud-based architecture supports the following Wi-Fi handovers in 5GS or EPS and non-3GPP untrusted access.
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EPC to non-3GPP untrusted Wi-Fi handover
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Non-3GPP untrusted Wi-Fi to EPC handover
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Non-3GPP untrusted Wi-Fi to 5GS handover with EPS fallback
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Non-3GPP untrusted Wi-Fi to 5GS handover
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5GS to non-3GPP untrusted Wi-Fi handover
Handover Indication Support
The SMF+IWF rejects the Create Session Request received with handover (HO) indication even if the session does not exist. This support is applicable only to the 4G and Wi-Fi sessions.
The gtpc message-handling create-session-request ho-ind new-call-reject CLI command under access profile rejects the call with "Context Not Found".
For more information, see the Configuring Calls with Handover Indication section.
Alternate RAT Tunnel Creation for Wi-Fi
SMF creates an alternate RAT tunnel during the Wi-Fi attach procedure. This tunnel is reused when a subscriber moves to another RAT during handover.
Note | Creation of an alternate RAT tunnel is prerequisite for the inter-PLMN handover support. |