Method for switching from 4G gateway to 5G gateway

The invention provides a method for switching from a 4G gateway to a 5G gateway. The method comprises the following steps: an SMF sends an N4 session creation request message to a user plane function UPF after a C1 judgment; after receiving the N4 session creation request message, the UPF stores the...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MEN HUAIYU, ZHANG QUANYU, ZHAO XIANMING, PAN ZIYI, TU KAI
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention provides a method for switching from a 4G gateway to a 5G gateway. The method comprises the following steps: an SMF sends an N4 session creation request message to a user plane function UPF after a C1 judgment; after receiving the N4 session creation request message, the UPF stores the control plane tunnel message of the original PGW, and creates the user plane and control plane tunnel information of the UPF; the UPF sends tunnel information of the UPF to the SMF; an OSPF (Open Shortest Path First) release protocol is used to release a route of a terminal address to a router, and an IP (Internet Protocol) data message is introduced into the UPF from the router; the SMF starts to release a timer of the original PGW tunnel; after the SMF timer is overtime, sending a session deletion request message to the original PGW, and deleting the original tunnel message; and the AMF replies a forwarding redirection response to the MME, and the method is beneficial to flexible deployment of the mobile network