5G Multi Access PDU Session Management for Network Slicing
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Solution Overview
Problem
Current 5G systems face challenges in efficiently managing network slicing and user plane connectivity, particularly in handling multiple network slices and optimizing traffic steering across different data networks.
Innovation Solution
The implementation of enhanced features and functionalities in 5G systems, including advanced registration and connection management protocols, network slicing selection functions, and optimized user plane functions, enables efficient management of network slices and user plane connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network slicing is implemented to support multiple data networks, then adaptability and service diversity are improved, but device complexity and management overhead increase
Solution Approach 1:
The patent segments the network into multiple independent network slices, each serving different data networks and service requirements. The UE maintains separate PDU sessions for different slices, allowing independent management and optimization of each slice without affecting others, thus resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent implements a universal PDU session establishment mechanism that can handle multiple data networks and slice types through a unified procedure. The same session management functions and signaling protocols are used across different slices, reducing overall system complexity while maintaining diverse adaptability.
2Reliability
If advanced registration and connection management protocols are implemented, then connection reliability is improved, but signaling overhead and processing time increase
Solution Approach 1:
The patent performs registration and session establishment actions in advance during the initial connection phase. The UE registers with the network and establishes PDU sessions before actual data transmission begins, so that when data needs to be sent, the connection is already validated and ready, reducing real-time signaling overhead and processing time.
3Productivity
If optimized user plane functions are implemented for traffic steering, then data transmission efficiency is improved, but control plane complexity increases
Solution Approach 1:
The patent introduces the UPF (User Plane Function) as an intermediary element that handles complex traffic steering and routing operations. The UPF receives control instructions from the control plane and executes optimized user plane functions for traffic steering between different data networks, isolating the complexity in the user plane while keeping the control plane relatively simple.
Data Source
AI summary
An AMF receives, from an SMF, a first request to activate user plane resources of an access network type from among multiple access network types of a MA PDU session of a wireless device, wherein the first request comprises an indication of the access network type, from among the multiple access network types. The AMF transmits, to the SMF, a response to the first request, wherein the response comprises a cause indicating that the AMF attempts to reach the wireless device.