AMF Network Slice Signaling for PDU Session Adaptation
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Solution Overview
Problem
Existing communication networks face challenges in efficiently managing network services and network slicing, particularly in supporting diverse wireless devices and technologies, leading to suboptimal performance and resource utilization.
Innovation Solution
Implementing a service-based architecture within the core network, utilizing network functions that offer services to each other and external domains, and employing a flexible framework for network slice deployments, allowing for dynamic adaptation based on device capabilities and traffic conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional network architecture is used to support diverse wireless devices and technologies, then device compatibility is maintained, but network efficiency and resource utilization deteriorate
Solution Approach 1:
The network architecture is segmented into multiple network slices, each optimized for specific services or device types. This allows the network to handle diverse devices efficiently by routing them through appropriate slices rather than using a monolithic architecture, thus maintaining compatibility while improving overall network efficiency.
Solution Approach 2:
The network employs dynamic resource allocation and adaptive slicing mechanisms that can adjust network parameters in real-time based on traffic conditions and device requirements. This dynamic approach enables the network to optimize performance for different device types without sacrificing compatibility.
2Productivity
If network slicing is implemented to improve resource utilization, then service quality improves, but system complexity increases
Solution Approach 1:
The patent implements a unified network slice management framework that handles multiple slicing functions through a single standardized interface. This universal management system reduces complexity by providing consistent procedures for slice creation, modification, and deletion across different network elements, despite the underlying complexity of multiple slices.
Solution Approach 2:
A network slice management function acts as an intermediary between the control plane and user plane, abstracting the complexity of slice management. This mediator handles slice-specific operations while presenting a simplified interface to other network components, thereby improving resource utilization without proportionally increasing overall system complexity.
3Reliability
If a rigid network architecture is used to ensure stability, then network reliability is maintained, but adaptability to varying traffic loads deteriorates
Solution Approach 1:
The network architecture implements dynamic parameters within a stable framework, allowing network slices to adapt their resource allocation and performance characteristics in response to varying traffic loads. This maintains overall network stability while enabling flexible adaptation to different traffic conditions through controlled dynamic adjustments.
Data Source
AI summary
An access and mobility management function (AMF) receives, from a wireless device, a request message for a protocol data unit (PDU) session via an allowed network slice. The AMF sends, to the wireless device, a message indicating the allowed network slice and an alternative network slice associated with the allowed network slice.