Femto Node CSG Identifier Broadcasting Without Membership Verification
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Solution Overview
Problem
Low power base stations in wireless communication systems face inefficiencies in membership verification processes when advertising closed subscriber group (CSG) identifiers, leading to unnecessary resource consumption and insecure transmission of user identities, especially when operating in open access modes.
Innovation Solution
The implementation of a method where low power base stations, such as femto nodes, can broadcast CSG identifiers without requiring membership verification for non-CSG user equipment (UEs), by configuring the base station and gateway to refrain from performing verification unless in closed or hybrid access modes, and by indicating non-CSG UEs as CSG UEs to bypass membership verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If low power base stations perform membership verification for all UEs advertising CSG identifiers, then security is improved, but resource consumption increases and registration efficiency deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the verification process based on UE type: CSG-capable UEs undergo membership verification while non-CSG UEs are granted access without verification. This selective approach maintains security for relevant users while improving registration efficiency for others, resolving the contradiction between security and productivity.
Solution Approach 2:
The patent inverts the conventional approach by assuming access is granted by default and only verifying membership when necessary (for CSG-capable UEs). Instead of verifying all UEs and granting access to authorized ones, the system grants access to all and restricts only those who fail verification, thereby improving overall registration efficiency while maintaining security.
2Reliability
If low power base stations perform membership verification for all UEs advertising CSG identifiers, then security is improved, but resource consumption increases
Solution Approach 1:
The patent applies local quality by differentiating the verification process based on UE type: CSG-capable UEs undergo membership verification while non-CSG UEs are granted access without verification. This selective approach maintains security for relevant users while improving registration efficiency for others, resolving the contradiction between security and productivity.
3Reliability
If low power base stations advertise CSG identifiers indicating closed or hybrid access, then restricted access control is improved, but access versatility deteriorates
Solution Approach 1:
The patent applies dynamics by enabling low power base stations to dynamically switch between closed access mode (verifying all CSG-capable UEs) and hybrid access mode (granting access to non-CSG UEs without verification). This dynamic adaptability allows the system to maintain restricted access control when needed while providing access versatility in other scenarios, resolving the contradiction between reliability and adaptability.
Data Source
AI summary
Methods and apparatuses are provided for avoiding membership verification for a non-closed subscriber group (CSG) user equipment (UE) communicating with a femto node advertising restricted access. A femto node or femto gateway can receive configuration information specifying to refrain from performing membership verification for UEs communicating with a femto node. Based on such information, the femto node or femto gateway can communicate registration information for a registration request received from a non-CSG UE without performing membership verification. Additionally or alternatively, femto nodes can register non-CSG UEs as CSG UEs to mitigate membership verification at femto gateways, request that femto gateways refrain from performing membership verification, and/or the like. In this regard, the femto node can use restricted access parameters for purposes other than restricting access.