Closed Subscriber Group White List Management
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Solution Overview
Problem
Current mobile communication systems lack a method to concurrently update and maintain consistency between the Allowed CSG list (ACL) and Operator CSG list (OCL) at User Equipment (UE), leading to issues like user experience degradation and increased network signaling overhead due to outdated or mismatched CSG lists during cell selection and handover processes.
Innovation Solution
Concurrently updating the ACL and OCL at the UE using Over-The-Air (OTA) or Open Mobile Alliance OMA DM methods, ensuring that the White CSG List (WCL) reflects the latest changes from both lists, thereby preventing the inclusion of obsolete or missing CSG IDs, and selecting the most recently updated list for access control criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the ACL and OCL are updated separately using different methods (OTA/OMA DM for OCL, NAS procedure for ACL), then each list can be updated independently, but the lists become inconsistent and outdated CSG IDs remain in the WCL causing access rejections and increased signaling overhead
Solution Approach 1:
The patent merges the update procedures for ACL and OCL into a single unified process. The network side device simultaneously updates both the Operator CSG List (OCL) and Allowed CSG List (ACL) during the same OTA or OMA DM update operation, ensuring that both lists remain consistent and are updated together rather than separately through different methods.
2Productivity
If the entire ACL is updated concurrently using OTA or OMA DM methods, then the update efficiency is improved, but the device complexity and update process complexity increase
Solution Approach 1:
The network side device automatically performs concurrent updates of both ACL and OCL through the existing OTA or OMA DM update mechanism without requiring additional complex procedures. The system leverages the already-established update infrastructure to simultaneously refresh both lists, avoiding the need for separate manual update processes while maintaining efficiency.
Data Source
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AI summary
A management method and apparatus for a Closed Subscriber Group (CSG) white list are provided in the present invention, which can avoid the case that causes the CSG white list of a User Equipment (UE) to include a new Operator CSG List (OCL) and an old Allowed CSG List (ACL). The method includes the following steps: a User Equipment (UE) receives an updated Operator CSG List (OCL) or an Allowed CSG List (ACL) from a network side; according to the updated OCL or ACL, UE generates the CSG white list. With the present invention, when UE performs cells selection or handover according to the CSG white list which is provided to a non-access stratum by an access stratum as a basis for access control, the selected CSG identifier can not be refused by the network, the user experience can not be reduced, and unnecessary network signaling overhead can not be increased.