Subscription Correlation ID Allocation Across 5G Network Functions
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Solution Overview
Problem
The existing 5G NR protocol lacks an efficient scheme for updating subscription information when a user registers across different Net Functions (NFs), leading to potential issues with unique Subscription Correlation IDs and timely recovery of subscription information.
Innovation Solution
A method and apparatus for updating subscription information, where a third NF receives subscription information from a second NF, allocates a new correlation identity to the first NF, and sends this identity back, enabling the first NF to send an update subscription message with the new correlation identity, ensuring seamless subscription updates across NFs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the New NF directly uses the Subscription Correlation ID allocated by the Old NF, then the subscription information transfer is simple, but the Subscription Correlation ID may not be unique in the New NF and the Old NF cannot recover the Subscription Correlation ID in time
Solution Approach 1:
The patent segments the Subscription Correlation ID into two parts: a first subscription information part from the Old NF and a second subscription information part generated by the New NF. This segmentation allows each NF to maintain uniqueness within its own domain while enabling the New NF to generate globally unique identifiers by combining both parts, thus resolving the uniqueness conflict without complex coordination protocols.
Solution Approach 2:
The Old NF performs preliminary action by allocating the first subscription information part and sending it to the New NF before the New NF needs to generate the complete Subscription Correlation ID. This preliminary allocation enables the New NF to efficiently generate unique IDs using the received first part combined with its own identifier, avoiding the need for complex real-time coordination while ensuring uniqueness.
2Reliability
If a subscription update mechanism is introduced to ensure unique correlation IDs, then the reliability of subscription information is improved, but the system complexity increases
Solution Approach 1:
The patent introduces an intermediary mechanism where the Old NF acts as a mediator by allocating the first subscription information part and providing it to the New NF. This intermediary approach simplifies the overall system by using existing NF communication channels rather than introducing complex new coordination protocols, thus improving reliability while minimizing added complexity.
Solution Approach 2:
The New NF creates a copy of the subscription relationship by generating a second subscription information part based on the first part received from the Old NF. This copying mechanism allows the New NF to maintain an accurate replica of the subscription information with updated correlation IDs, ensuring reliability without requiring complex real-time synchronization protocols.
3Productivity
If the Old NF transfers subscription information directly to the New NF, then the transfer process is efficient, but the New NF cannot ensure unique correlation IDs and timely recovery fails
Solution Approach 1:
The patent segments the correlation ID generation process into two efficient steps: the Old NF allocates the first subscription information part and sends it to the New NF, then the New NF independently generates the second part. This segmentation maintains transfer efficiency by avoiding complex real-time coordination while ensuring uniqueness through distributed generation, thus resolving the contradiction between efficiency and reliability.
Solution Approach 2:
The Old NF performs preliminary allocation of the first subscription information part before the transfer, enabling the New NF to efficiently complete the correlation ID generation by simply adding its own identifier. This preliminary action maintains high transfer efficiency while ensuring uniqueness, as the New NF can immediately generate a unique ID without complex verification protocols.
Data Source
AI summary
Provided are a method and apparatus for updating subscription information. The method includes steps described below. After a second NF transfers first subscription information to a third NF, where the first subscription information includes a first correlation identity allocated by the second NF to a first NF, the third NF allocates a second correlation identity to the first NF, and the third NF receives update subscription information of the first NF, where the update subscription information includes the second correlation identity. By using the above scheme, the issue of the lack of an update scheme of the subscription information adaptable a new system in the related art is resolved, and the update scheme of the subscription information adaptable the new system is proposed, for example, when across-NF registration of the user terminal is generated, the subscription message is updated between the new third NF and the first NF in time.