Method Of Access And Mobility Management Function (Amf) Apparatus, Method Of User Equipment (Ue), Method Of Network Slice Admission Control Function (Nsacf) Apparatus, Method Of Radio Access Network (Ran) Node, Method Of Policy Control Function (Pcf) Apparatus, Amf Apparatus, Ue, Nsacf Apparatus, Ran Node And Pcf Apparatus

Abstract: [Problem] This disclosure addresses how to define a mechanism for allocating the most suitable network slice to the UE or UE's PDU session in certain scenarios if a requested network slice from the UE is not allowed due to the Network Slice Admission Control. [Solution] A method of an Access and Mobility management Function (AMF) apparatus includes receiving, from a User Equipment (UE), first information related to a first network slice and second information related to a second network slice, and sending, to a Session Management Function (SMF) apparatus, the second information to establish a Protocol Data Unit (PDU) session on the second network slice in a case where the first network slice is overloaded.

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