Closed Subscriber Group Access Control via Non-Access Register
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Solution Overview
Problem
Current communication standards lack a mechanism to handle denial of access to closed subscriber groups (CSGs), leading to unnecessary resource consumption and repeated attempts by user equipment (UE) to access restricted cells.
Innovation Solution
Implementing a 'blacklist' or non-access register within user equipment (UE) to store identifiers of CSGs to which access is denied, preventing further attempts to access these cells and conserving network resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE continuously attempts to access CSG cells without access rights, then access control is maintained, but signaling and power consumption increase
Solution Approach 1:
The UE performs preliminary action by storing CSG identifiers in a blacklist register before attempting access. When a CSG cell is detected, the UE first checks the blacklist register to determine whether access attempts should be made, thereby preventing unnecessary signaling and power consumption for cells where access is definitely denied.
Solution Approach 2:
The system implements feedback by having the network provide information about CSG access status to the UE. The UE uses this feedback information to update its blacklist register, which then guides future access decisions, creating a closed-loop system that reduces unnecessary access attempts.
2Reliability
If UE repeatedly attempts to access CSG cells, then access control is enforced, but network resources are consumed
Solution Approach 1:
The UE performs preliminary action by maintaining a blacklist register of CSG identifiers before attempting access. This pre-computed list allows the UE to quickly identify cells where access is denied without needing to repeatedly attempt connection, thereby conserving network resources for legitimate access attempts.
Solution Approach 2:
The system extracts the essential information about CSG access status from the network and stores it in the UE's blacklist register. This extraction eliminates the need for repeated access attempts to restricted cells, as the UE can directly consult the blacklist to determine accessibility.
3Adaptability or versatility
If UE manually searches for CSG cells, then access opportunities are explored, but signaling overhead increases
Solution Approach 1:
The UE performs preliminary action by pre-loading CSG identifiers into its blacklist register before manual search operations. During manual search, the UE uses this pre-prepared list to quickly filter and identify accessible cells, reducing the signaling overhead that would otherwise be required to verify access rights for each cell individually.
Data Source
AI summary
An apparatus for providing closed subscriber group access control may include a processor. The processor may be configured to maintain a non-access register including an identifier of a communication cell associated with a closed subscriber group to which a communication device associated with the non-access register does not have access rights, and enable subsequent communication with another communication cell based on the other communication cell not being identified in the non-access register. A corresponding method and computer program product are also provided.