AMF LADN Service PDU Session Establishment Control
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Solution Overview
Problem
The usability of Local Access Data Network (LADN) services is low due to unclear initiation of PDU sessions in user equipment (UE), as the UE is not forced to establish a PDU session when the network is ready to provide the service, leading to inefficiencies in service utilization.
Innovation Solution
A method where the Access and Mobility Management Function (AMF) in the wireless communication system provides clear indications for PDU session establishment, allowing direct network commands for UE to initiate PDU sessions, thereby enhancing the usability and flexibility of LADN services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the UE is not forced to establish a PDU session when the network is ready to provide LADN service, then the UE has autonomy in session establishment, but the usability and service utilization of LADN service decreases
Solution Approach 1:
The network provides feedback to the UE through downlink messages indicating whether a PDU session should be established for LADN service. The AMF sends a notification to the UE when the network is ready to provide LADN service, creating a feedback loop that guides UE behavior while maintaining network control over service utilization
Solution Approach 2:
The network performs preliminary action by preparing the LADN service environment and notifying the UE in advance before actual service delivery. The AMF sends a downlink notification to the UE indicating that the PDU session establishment is triggered, allowing the UE to prepare for service reception without forcing immediate session establishment
2Productivity
If the network provides clear indications for PDU session establishment, then the usability and flexibility of LADN service increases, but the network complexity and control overhead increases
Solution Approach 1:
The patent extracts the PDU session establishment trigger indication from the complex network control plane and delivers it through a simplified downlink message from AMF to UE. This separates the service readiness notification function from the detailed session management procedures, reducing perceived network complexity while maintaining control
Solution Approach 2:
The downlink notification message serves multiple functions: it indicates PDU session establishment trigger, confirms LADN service availability, and guides UE behavior. This multi-functional approach consolidates control signals into a single message type, reducing overall network control complexity while providing comprehensive service management
Data Source
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AI summary
An aspect of the disclosure relates to a method for supporting a local access data network (LADN) service by an access and mobility management function (AMF) in a wireless communication system, and the method may comprise the steps of: providing LADN information for the LADN service to a terminal, wherein the LADN information includes LADN service area information and LADN data network name (DNN) information; acquiring location information of the terminal; when establishment of a packet data unit (PDU) session for providing the LADN service is determined on the basis of the location information of the terminal, transmitting to the terminal a preset message including a request for the establishment of the PDU session; and receiving, from the terminal, a request message for initiating the establishment of the PDU session.