Mobility Management Network Element CSG Subscription Data Acquisition
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Solution Overview
Problem
In wireless communication networks, mobility management network elements in visited domain networks often fail to acquire updated Closed Subscriber Group (CSG) subscription data, leading to user equipment being unable to access CSG areas it is allowed to access.
Innovation Solution
The mobility management network element actively requests CSG subscription data from the CSG subscriber server when it does not have the data and the server does not store its identifier, ensuring that the updated subscription data is obtained and synchronized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobility management network element relies on the CSG subscriber server to proactively provide updated subscription data, then the server can maintain autonomy in the visited domain network, but the network element cannot acquire updated data when the server does not store its identifier
Solution Approach 1:
The patent inverts the traditional proactive push mechanism by implementing a reactive pull mechanism. Instead of the CSG subscriber server proactively pushing updated subscription data to the mobility management network element, the network element actively requests and pulls updated data from the server when needed. This inversion ensures that data is acquired reliably without requiring the server to maintain complex state information about which network elements need updates.
2Loss of information
If the mobility management network element requests CSG subscription data frequently to ensure updated information, then data freshness is improved, but network signaling overhead increases
Solution Approach 1:
The patent implements a feedback mechanism where the mobility management network element monitors access failure events and uses this feedback to determine when to request updated CSG subscription data. Specifically, when a UE access failure occurs, the network element checks whether it has the latest subscription data and only requests updates when necessary. This feedback-driven approach ensures data freshness while minimizing unnecessary signaling overhead by avoiding redundant requests when data is already current.
Data Source
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AI summary
The present invention relates to a method, a device, and a system for processing a request for closed subscriber group subscription data. The method includes: receiving, by a closed subscriber group subscriber server, a request for closed subscriber group subscription data sent by a mobility management network element, where the request for closed subscriber group subscription data includes an identifier of the mobility management network element and an identifier of a user equipment, and is used for requesting closed subscriber group subscription data of the user equipment; and if the closed subscriber group subscription data of the user equipment does not exist, storing, by the closed subscriber group subscriber server, the identifier of the mobility management network element and the identifier of the user equipment. The method can avoid that the mobility management network element cannot obtain updated closed subscriber group subscription data of the user equipment.