PDU Session Anchor Change for 5G Slice Congestion Continuity
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Solution Overview
Problem
Existing 5G systems lack an effective method for continuing PDU sessions in network slices when congestion occurs or network performance does not meet service level agreements, especially in scenarios with mobility changes.
Innovation Solution
Implementing functions for Network Slices (NS) and/or Standalone Non-Public Networks (SNPN) to manage PDU sessions in congested network slices, ensuring service continuity and compliance with SLAs, even in the presence of mobility changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network slice resources are allocated to meet service level agreements, then service quality is improved, but network congestion occurs when multiple services share the same physical infrastructure
Solution Approach 1:
The patent segments the network slice resources by introducing a resource partitioning mechanism that divides physical network resources into multiple virtual resource pools. Each service type (e.g., eMBB, URLLC, mMTC) is allocated dedicated virtual resources within the network slice, preventing resource contention and congestion while ensuring service level agreement compliance through guaranteed resource availability.
Solution Approach 2:
The patent implements dynamic resource allocation that adjusts resource distribution in real-time based on network conditions and service requirements. When congestion is detected, the system dynamically reconfigures resource allocation ratios between different services, allowing flexible adaptation to maintain both service quality and prevent congestion without requiring static over-provisioning.
2Reliability
If network slice management functions are enhanced to handle mobility, then service continuity is improved, but system complexity increases
Solution Approach 1:
The patent enhances the AMF (Access and Mobility Management Function) with multi-functional capabilities to handle both mobility management and network slice resource management. The AMF is equipped with a network slice resource manager that can simultaneously perform registration management, mobility management, and dynamic resource allocation across multiple network slices, reducing the need for separate dedicated management systems and thereby controlling complexity while improving service continuity.
Solution Approach 2:
The patent implements a nested management architecture where the network slice resource manager is embedded within the AMF structure. The resource management functions are nested as sub-components of the mobility management framework, allowing seamless integration of slice-specific resource handling into the existing mobility management流程, thereby maintaining service continuity without proportionally increasing overall system complexity.
Data Source
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AI summary
In 5GS, provided is a communication unit for continuing services of a PDU session in a network slice in a case that the network slice is congested, a case that network performance of the network slice does not satisfy an SLA, or the like. In 5GS, provided are a method and a communication unit for a PDU session modification procedure, and/or a PDU session release procedure, and/or a PDU session establishment procedure, and/or a PDU session anchor change procedure, for implementing session and/or service continuity by changing a slice and changing PDU session anchor, in a case that a network slice is congested, a case that network performance of the network slice does not satisfy an SLA, or the like.