Network Exposure Event Monitoring for Accurate Group UE Cancellation
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Solution Overview
Problem
Existing 3GPP systems face issues with incorrect cancellation of event subscriptions for user equipment, particularly when group member UEs are involved, leading to mis-operations between the Service Capability Exposure Function (SCEF) and the Service Capability Server (SCS)/Application Server (AS).
Innovation Solution
The proposed solution involves a network exposure node that determines whether a UE is an individual or group member based on received messages, sending specific UE identification information when necessary, to ensure accurate cancellation of event subscriptions, thereby preventing mis-operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the network exposure node cancels event subscriptions for group member UEs without distinguishing individual vs group cancellations, then the cancellation process is simplified, but incorrect cancellation occurs leading to mis-operations between SCEF and SCS/AS
Solution Approach 1:
The patent applies local quality by differentiating the cancellation behavior based on whether the UE is an individual UE or a group member UE. For individual UEs, the subscription is cancelled immediately. For group member UEs, the system checks whether the cancellation is for the individual UE only or for the entire group, and handles accordingly. This localized differentiation resolves the contradiction by maintaining simplicity for individual cases while ensuring accuracy for group cases.
Solution Approach 2:
The patent introduces dynamic behavior in the cancellation process by making the cancellation scope flexible. The system can dynamically adjust whether to cancel only the individual UE's subscription or the entire group's subscription based on the cancellation request parameters. This dynamic approach allows the system to adapt to different operational scenarios, resolving the contradiction between operational simplicity and cancellation accuracy.
2Stability of the object's composition
If the network exposure node sends cancellation messages to all UEs in a group when one UE cancels, then group consistency is maintained, but unnecessary signalling increases
Solution Approach 1:
The patent applies partial action by sending cancellation messages only to the necessary UEs. When an individual UE cancels, the system sends the cancellation message only to that specific UE, not to all UEs in the group. However, when a group member UE cancels, the system sends the cancellation message to all group member UEs to maintain group consistency. This selective partial action resolves the contradiction by minimizing unnecessary signalling while maintaining group consistency when needed.
3Device complexity
If the network exposure node deletes event subscription resources immediately upon cancellation, then resource management is simplified, but resource allocation conflicts may occur
Solution Approach 1:
The patent applies preliminary action by first determining the UE type (individual or group member) and the cancellation scope before actually deleting the subscription resources. The system performs this determination and message sending as a preliminary step, and only after confirming the cancellation is complete and no conflicts are expected does it proceed to delete the resources. This preliminary action resolves the contradiction by preventing resource allocation conflicts while maintaining simplified resource management through clear procedural steps.
Data Source
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AI summary
A method implemented at a network exposure node is provided. The method includes: receiving, from a first node, a first message for deleting an event subscription for at least one user equipment, UE; determining whether the at least one UE is an individual UE or a group member UE; sending a second message to a second node, when the at least one UE is a group member UE, wherein the second message includes UE identification information of the at least one UE.