SMF Redundant PDU Session Selection Using NWDAF Analytics
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Solution Overview
Problem
Existing mobile communication networks face challenges in managing redundant transmission of Protocol Data Unit (PDU) sessions, particularly in next-generation mobile communication systems, where redundant transmission has not been effectively addressed by current Network Data Analytics Functions (NWDAF) extensions.
Innovation Solution
The proposed method involves the Session Management Function (SMF) node obtaining analytics information from the NWDAF to determine redundant PDU session transmissions through two tunnels, utilizing a chipset, device, or computer-readable storage medium with instructions to perform operations that identify and manage such redundant transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant transmission is implemented for PDU sessions, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the NWDAF function into specialized sub-functions: a first NWDAF for URLLC service analytics and a second NWDAF for redundant transmission analytics. This segmentation allows each sub-function to focus on specific tasks, improving reliability through dedicated analytics while managing overall system complexity through functional decomposition.
Solution Approach 2:
The patent implements multi-functionality by enabling the NWDAF to perform both URLLC service analytics and redundant transmission analytics within the same network framework. The analytics function is extended to handle multiple service types and transmission scenarios, reducing the need for separate dedicated systems while maintaining reliability through comprehensive analytics coverage.
2Measurement precision
If analytics information is obtained from NWDAF for redundant transmission, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent implements preliminary action by having the NWDAF continuously collect and analyze transmission data in advance, maintaining ready-to-use analytics information about redundant transmissions. This pre-computation approach ensures high measurement precision when needed while minimizing acquisition time, as the analytics are prepared beforehand rather than computed on-demand.
Solution Approach 2:
The patent establishes a feedback mechanism where the NWDAF continuously monitors transmission patterns and provides real-time analytics information about redundant transmissions. This ongoing feedback loop maintains measurement precision through continuous data collection while reducing time loss by having analytics readily available through persistent monitoring and automated reporting.
Data Source
AI summary
One disclosure of the present specification may provide an operation method of a session management function (SMF) node for managing a protocol data unit (PDU) session. The method may comprise a step of acquiring analysis information from a network data analytics function (NWDAF) node. The acquired analysis information may include experience analysis information for redundant transmission. The method may comprise a step of determining, on the basis of the analysis information, the PDU session to be redundantly transmitted through two tunnels during a procedure related to the PDU session.