Patent ID: 11877187
Assignee: NEC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A method performed by an Access and Mobility Management Function (AMF) node to be located in a core network, the method comprising:
sending a PDU session resource setup request message to a master Radio Access Network (RAN) node, the PDU session resource setup request message including first information indicating either split of a PDU session is permitted or split of the PDU session can be performed, the PDU session being established between a radio terminal and a User Plane Function (UPF) in the core network; and
receiving, from the master RAN node, a PDU Session Resource Modify Indi cation message requesting modification of the PDU session, wherein
the PDU Session Resource Modify Indication message is used to indicate to the AMF node that the already established PDU session is to be split over a plurality of tunnels, and
the PDU Session Resource Modify Indication message includes a list of one or more Quality of Service (QoS) flows associated with the split of the already established PDU session.