PLMN Basis CSG Display Configuration for Mobile Devices
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Solution Overview
Problem
Current wireless communication systems lack the ability to efficiently configure per Public Land Mobile Network (PLMN) basis for displaying Closed Subscriber Group (CSG) identities during manual CSG selection, leading to inefficient operations and unnecessary signaling and battery power consumption.
Innovation Solution
A method and device that store PLMN basis settings in the USIM or memory to control the display of CSG identities, allowing only operator-controlled list CSG identities to be shown, and prohibiting frequency scanning when the operator-controlled list is empty, thereby optimizing manual CSG selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the UE displays all available CSG identities during manual CSG selection, then the user can see all options, but unnecessary signaling and power consumption occur when the operator-controlled list is empty
Solution Approach 1:
The patent applies local quality by differentiating the display behavior based on the PLMN context. When the operator-controlled CSG list is configured for a specific PLMN, the UE displays only those CSG identities locally relevant to that PLMN, rather than all available CSG identities globally. This localized filtering reduces unnecessary display updates and associated power consumption while maintaining full functionality when needed.
Solution Approach 2:
The patent implements partial action by conditionally performing the frequency scanning and CSG identity display operation. Instead of always scanning all frequencies and displaying all CSG identities during manual CSG selection, the UE performs this operation only when the operator-controlled CSG list is configured for the current PLMN. This partial execution eliminates redundant actions and reduces power consumption.
2Loss of information
If the UE performs frequency scanning to find available CSGs, then complete CSG information is obtained, but unnecessary signaling occurs when the operator-controlled list is empty
Solution Approach 1:
The patent applies preliminary action by pre-configuring the operator-controlled CSG list for each PLMN before the manual CSG selection is initiated. The UE checks whether this list is configured in advance, and only performs frequency scanning and CSG information collection when the list exists. This preliminary configuration check prevents unnecessary scanning and signaling operations from occurring in the first place.
Solution Approach 2:
The patent uses local quality by making the frequency scanning operation conditional on the presence of operator-controlled CSG list configuration for the specific PLMN. When configured, the UE performs local scanning to obtain CSG information relevant to that PLMN. When not configured, the scanning operation is skipped entirely, eliminating unnecessary signaling overhead while preserving information completeness when needed.
3Productivity
If per-PLMN basis configuration is implemented, then CSG display is optimized, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling the UE to automatically check and determine whether the operator-controlled CSG list is configured for the current PLMN, and to autonomously decide whether to perform frequency scanning and how to display CSG identities. The device manages its own configuration state without requiring external control or complex user intervention, thereby achieving optimization without proportionally increasing complexity.
Solution Approach 2:
The patent implements universality by designing the configuration mechanism to work across different PLMN contexts using a unified approach. The same configuration structure (operator-controlled CSG list per PLMN) and decision logic are applied universally regardless of which PLMN the UE is camped on. This multi-functional design allows the system to handle different scenarios with a single mechanism, avoiding the need for separate complex configurations for each case.
Data Source
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AI summary
A method of handling manual closed subscriber group (CSG) selection for a mobile device in a wireless communication system is disclosed. The method comprises storing a public land mobile network (PLMN) basis setting for indicating the mobile device to display all available CSG identities or only CSG identities present in an operator controlled list of allowed CSG identities, in a Subscriber Identity Module (SIM), an Universal Subscriber Identity Module (USIM) or a memory of the mobile device; and displaying CSG identities according to the PLMN basis setting during the manual CSG selection.