Redundant PDU Session Routing for Disjoint UP Paths
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Solution Overview
Problem
Existing technologies face challenges in establishing disjoint User Plane (UP) paths for multiple PDU sessions, which is essential for redundant delivery in New Radio (NR) systems.
Innovation Solution
A method and apparatus are provided to establish PDU sessions with redundant transmission by receiving a PDU session establishment request, determining a target node and resource selection number (RSN) using an AI/ML model, and allocating a UP path based on the determined RSN value and PDU session pair ID.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PDU sessions are established for redundant delivery, then reliability is improved, but it becomes impossible to establish disjoint User Plane paths
Solution Approach 1:
The patent segments the PDU session establishment process by introducing a PDU session pair ID to group related sessions and an RSN parameter to identify specific resource selections. This segmentation allows the system to manage multiple PDU sessions independently while ensuring disjoint User Plane paths through structured resource allocation.
Solution Approach 2:
The patent applies preliminary action by determining the target node and RSN using an AI/ML model before actual UP path allocation. This predictive approach pre-establishes the conditions for disjoint paths, ensuring that redundant PDU sessions can be properly configured before traffic flow begins, thus resolving the path establishment complexity.
2Productivity
If AI/ML model is used to determine target node and RSN, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary AI/ML model that acts as a mediator between the PDU session establishment request and the resource allocation process. This intermediary component automates the complex decision-making for target node and RSN selection, improving establishment efficiency while encapsulating the complexity within a dedicated module rather than distributing it throughout the system.
Data Source
AI summary
One disclosure of the present specification provides a method by which an NG-RAN performs communication. The method may comprise the steps of: receiving a PDU session establishment request message from UE; transmitting the PDU session establishment request message to an SMF; receiving, from the SMF, a PDU session resource configuration request message including a requested RSN and PDU session pair ID; on the basis of an AI/ML model, determining a target node and RSN for a PDU session related to redundant transmission; and allocating an UP path on the basis of the determined RSN value and the PDU session pair ID.