PFD Deduplication in UDR for Accurate SMF Flow Selection
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Solution Overview
Problem
In wireless network management, redundant packet flow description (PFD) information is dumped to a unified data repository (UDR) by both the network exposure function (NEF) and application function (AF), leading to storage space occupation, increased complexity, and reduced accuracy in selecting the PFD information by the session management function (SMF).
Innovation Solution
A method where a first device obtains a first PFD and a second PFD, and sends a PFD set to the UDR based on comparison of triplets, application IDs, and source information, ensuring only unique and reliable PFDs are stored, thereby reducing redundancy and improving selection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the NEF directly dumps all PFD information from both NWDAF and AF to the UDR, then the completeness of PFD information is improved, but the storage space occupation and data redundancy increase
Solution Approach 1:
The NEF performs preliminary deduplication action before dumping PFD information to the UDR. By comparing triplets and application IDs locally, the NEF filters out redundant PFDs in advance, ensuring only unique PFDs are stored in the UDR, thus preventing storage space occupation by duplicate data
Solution Approach 2:
The NEF extracts and removes redundant PFD information before transferring to the UDR. By identifying and taking out duplicate PFDs based on triplet and application ID comparison, the system retains only essential unique PFDs, reducing the quantity of data stored while maintaining information completeness
2Adaptability or versatility
If multiple PFD information pieces are stored in the UDR for the same application, then the information richness is improved, but the SMF operation complexity increases
Solution Approach 1:
The NEF performs preliminary filtering and deduplication action before storing PFD information in the UDR. By pre-processing to ensure only unique PFDs are stored, the system reduces the burden on SMF during subsequent operations, simplifying the selection and management processes
Solution Approach 2:
The NEF extracts and removes redundant PFD information that would increase operational complexity. By taking out duplicate PFDs based on triplet and application ID comparisons, the system maintains information richness while eliminating unnecessary data that would complicate SMF operations
3Reliability
If redundant PFD information is stored in the UDR, then the data availability is improved, but the management accuracy decreases
Solution Approach 1:
The NEF performs preliminary deduplication action by comparing triplets and application IDs before storing PFDs in the UDR. This ensures only unique, non-redundant PFDs are stored, maintaining data availability while improving the accuracy and reliability of traffic flow management operations
Solution Approach 2:
The NEF extracts and removes redundant PFD information that would compromise management accuracy. By taking out duplicate PFDs based on triplet and application ID comparisons, the system ensures that only accurate, unique PFDs remain in the UDR, improving traffic flow management precision
Data Source
AI summary
The present disclosure provides a data processing method and apparatus to reduce storage space occupied by a redundant packet flow description (PFD) stored in a unified data repository (UDR). After obtaining a first PFD, a first device obtains a second PFD from a second device, and sends a PFD set to a UDR based on the first PFD and the second PFD, so that the UDR can update PFD information in the second PFD based on the PFD set. The PFD set includes at least one of the first PFD and the second PFD, the first PFD includes a first triplet and a first application ID, and the second PFD includes a second triplet and a second application ID.