Dynamic NSAC Information Retrieval in VPLMN
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Solution Overview
Problem
Existing cellular communications systems face challenges in dynamically managing Network Slice Admission Control (NSAC) without pre-configuration, particularly in Visited Public Land Mobile Networks (VPLMNs) for User Equipments (UEs).
Innovation Solution
The system dynamically retrieves NSAC information by receiving requests from UEs, obtaining subscription data indicating whether VPLMN or Home Public Land Mobile Network (HPLMN) control should be applied, and sending update requests to the Network Slice Admission Control Function (NSACF) in the VPLMN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-configuration is used for NSAC in VPLMN, then system reliability is improved, but device complexity and adaptability worsen due to rigid configuration requirements
Solution Approach 1:
The patent implements dynamic NSAC configuration where the VPLMN can switch between VPLMN-controlled and HPLMN-controlled modes based on real-time conditions. The network node dynamically determines which PLMN should perform NSAC for each network slice, allowing flexible adaptation without pre-configuration constraints. This resolves the contradiction by making the control mechanism dynamic rather than static.
Solution Approach 2:
The system changes the control parameter from fixed pre-configuration to dynamic subscription data retrieval. The network node obtains NSAC control mode information from subscription data, allowing the parameter controlling NSAC behavior to change based on user-specific configurations rather than being fixed for all users, thereby improving both reliability and adaptability.
2Stability of the object's composition
If pre-configuration is required for NSAC, then system stability is improved, but ease of operation worsens due to complex configuration management
Solution Approach 1:
The network node automatically retrieves NSAC control mode information from subscription data without requiring manual pre-configuration or complex configuration management. The system serves itself by dynamically obtaining the necessary control parameters from the user's subscription profile, eliminating the need for operators to manually configure NSAC settings while maintaining system stability through standardized data retrieval processes.
3Adaptability or versatility
If dynamic retrieval of NSAC information is implemented, then adaptability is improved, but loss of information increases due to additional signaling between network nodes
Solution Approach 1:
The NSAC control mode information is retrieved from subscription data during the initial attachment or registration process, rather than being dynamically queried for each NSAC decision. This preliminary retrieval stores the control mode information in advance, reducing subsequent signaling overhead while maintaining the ability to adapt to different user configurations. The information is obtained once and reused, minimizing information loss through repeated signaling.
Data Source
AI summary
Systems and methods are disclosed for dynamic retrieval of Network Slice Admission Control (NSAC) information in a Visited Public Land Mobile Network (VPLMN) of a User Equipment (UE). In one embodiment, a method performed by a network node in a VPLMN of a UE comprises receiving, from the UE, a request comprising information indicating a particular network slice that is subject to NSAC. The method further comprises obtaining subscription data that comprises information that indicates whether VPLMN or Home Public Land Mobile Network (HPLMN) control should be applied for NSAC and sending an update request to a Network Slice Admission Control Function (NSACF) in the VPLMN of the UE, wherein the update request comprises the information that indicates whether VPLMN or HPLMN control should be applied for NSAC.