Subscriber Data Management in 5G UDRs
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Solution Overview
Problem
In 5G communication systems, the lack of a deletion mechanism for policy information in visited UDRs leads to storage resource wastage due to retained policy information that becomes invalid when UE moves between VPLMNs or back to HPLMN, especially in scenarios with a large number of roaming subscribers and rapid updates.
Innovation Solution
Implement a data management method where policy information is stored using a location area as a classification, allowing for efficient retrieval and deletion of redundant information by using keywords like PLMN ID, location area, and UE capability, and triggering deletion when UE moves between VPLMNs or back to HPLMN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If policy information is stored in visited UDR for roaming subscribers, then policy delivery is enabled in roaming scenarios, but storage resources are wasted when UE moves between VPLMNs or back to HPLMN
Solution Approach 1:
The system performs preliminary classification of policy information by location area before storage. When UE moves between VPLMNs or returns to HPLMN, the system can quickly identify and delete only the policy information that is no longer valid based on the pre-established location area classification, rather than blindly retaining all policy data.
Solution Approach 2:
The patent changes the storage organization parameter from storing policy information by individual UE identity to storing by location area classification. This parameter change enables efficient identification and deletion of invalid policy information when UE moves, resolving the contradiction between maintaining policy delivery reliability and avoiding storage resource waste.
2Loss of information
If policy information is retained in V-UDR without deletion mechanism, then policy information availability is maintained, but storage space is wasted due to large quantity of roaming subscribers and rapid updates
Solution Approach 1:
The system pre-classifies policy information by location area parameters (such as PLMN ID, location area code) before storage. This preliminary organization enables the system to quickly identify which policy information should be retained and which should be deleted when UE moves, maintaining information availability while preventing storage space waste.
Solution Approach 2:
The patent introduces location area classification parameters (PLMN ID, location area code, tracking area code) as the basis for storing policy information. This parameter change transforms the storage structure from UE-centric to location-centric, enabling efficient management of policy information quantity in response to subscriber movement patterns.
3Measurement precision
If policy information is stored with UE-specific granularity, then individual UE policy management is precise, but retrieval and deletion efficiency is reduced
Solution Approach 1:
The patent segments policy information storage by location area (PLMN ID, location area code, tracking area code) rather than by individual UE identity. This segmentation allows the system to efficiently retrieve and delete policy information for groups of UEs in the same location area, significantly improving productivity while maintaining precise control through location-based parameters.
Solution Approach 2:
The patent changes the organizational parameter from UE-specific identifiers to location area parameters. This parameter transformation enables the system to balance between precise policy management (through location parameters) and operational efficiency (through bulk operations on location-based groups), resolving the contradiction between precision and productivity.
Data Source
AI summary
A data management method includes sending, by a first communications apparatus, first request information to a second communications apparatus, where the first request information includes subscription permanent identifier (SUPI) information of user equipment (UE), and the first request information is used to instruct the second communications apparatus to obtain, from a third communications apparatus, policy information of the UE stored in the third communications apparatus, where the policy information is stored in the third communications apparatus by using a location area as a classification, and receiving, by the first communications apparatus, the policy information sent by the second communications apparatus.