Network Slice Session Control for PDU Quota Limits

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Solution Overview

Problem

Existing 5G systems face challenges in efficiently managing and controlling the number of UEs and PDU sessions, particularly in network slicing, which affects network performance and resource allocation.

Innovation Solution

Implementing enhanced features and functionalities in 5G systems to manage and control the number of UEs and PDU sessions through network slicing, utilizing network functions such as AMF, SMF, UPF, PCF, and NEF to optimize resource allocation and network behavior.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If network slicing is implemented to support diverse services, then service versatility is improved, but network complexity increases

Engineering Contradiction:
Improveservice versatilityVSAvoidnetwork complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the network into separate slices (e.g., slice 105a, 105b, 105c) that can be independently managed and optimized for different services. Each slice is associated with specific network functions and can be controlled through dedicated control mechanisms, allowing the network to handle diverse services while maintaining manageable complexity through modular organization.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent introduces network slicing control as an intermediary layer between the core network and individual network functions. This control mechanism acts as a mediator that manages slice instantiation, modification, and termination, simplifying the overall network complexity by providing a centralized approach to handling multiple slices without requiring direct management of each individual network function.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the number of UEs and PDU sessions is increased to support more users, then user coverage is improved, but network resource allocation difficulty increases

Engineering Contradiction:
Improveuser coverageVSAvoidresource allocation difficulty
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies local quality by allowing different network slices to have distinct quality characteristics and resource allocation policies tailored to their specific service requirements. Each slice can be configured with appropriate resource parameters (e.g., bandwidth, latency requirements) that match its service type, enabling differentiated service quality without requiring uniform resource management across the entire network.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent implements dynamics through the ability to dynamically instantiate, modify, and terminate network slices based on real-time demand. The network can dynamically allocate resources to new slices or existing slices as needed, and the system can adapt slice configurations dynamically without requiring static, long-term resource reservations, thereby improving user coverage while maintaining flexible resource management.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS12507161B2Control of network slice
Publication Date: 2025.12.23 BLOOMSBURY DESIGN LABS LLC
  • US12507161B2 patent drawing
  • US12507161B2 patent drawing
  • US12507161B2 patent drawing

AI summary

A visited session management function of a visited public land mobile network (PLMN) sends, to a home session management function of a home PLMN of a wireless device, a request of the wireless device for a packet data unit, PDU, session in a network slice. The visited session management function receives, from the home session management function, a cause value indicating that a network slice quota of the home PLMN has been reached for a number of PDU sessions for the network slice.