FIELD: electrical communication engineering.
SUBSTANCE: invention relates to wireless communication. Access and mobility management (AMF) access control unit processes a session data session of a packet data unit (PDU). When the PDU communication session establishment request includes an identifier of the existing PDU communication session, it is determined whether or not to reject the PDU communication session establishment request. Session control function node (SMF) identifier can be obtained based on the identifier of an existing communication session. If it is determined that the SMF node and the AMF node both belong to the same public land mobile network (PLMN) based on the SMF node identifier, a PDU communication session establishment request may be received. If it is determined that the SMF node and the AMF node both belong to the home PLMN (HPLMN) based on the SMF node identifier, a PDU communication establishment request may be received.
EFFECT: technical result consists in improvement of method of processing procedure for establishing PDU communication session.
14 cl, 25 dwg, 1 tbl
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