CSG ID-Based Base Station Selection in Heterogeneous Networks
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Solution Overview
Problem
Conventional techniques fail to effectively enable mobile devices to identify and preferentially select the appropriate base station for registration and access, especially when some base stations allow access by all devices while others restrict access to authorized devices only, leading to issues with billing and resource management in heterogeneous wireless communication systems.
Innovation Solution
The use of Closed Subscriber Group (CSG) Identifiers (IDs) and indications that differentiate between base stations allowing access to members and non-members, allowing mobile devices to compare received CSG IDs with an allowed list to determine access preferences and select the appropriate base station based on membership and billing arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional base station selection techniques are used, then mobile devices can connect to available base stations, but mobile devices cannot effectively identify and preferentially select the appropriate base station when multiple base stations are present with different access policies
Solution Approach 1:
The patent segments base stations into distinct categories (CSG base stations with member-only access, hybrid base stations with selective access, and open base stations with universal access) based on their access policies. Mobile devices use CSG IDs and access policy indicators to identify and segment base stations, enabling preferential selection according to membership status and billing arrangements.
Solution Approach 2:
The patent implements preliminary action by having mobile devices obtain and store CSG IDs and access policy indicators from base stations before attempting connection. The device compares received CSG IDs against its stored list of allowed CSG IDs to pre-determine compatibility and generate selection preferences, avoiding futile connection attempts and enabling informed base station selection.
2Adaptability or versatility
If base stations allow access by substantially any mobile device, then coverage and accessibility are improved, but billing differentiation and resource management become problematic
Solution Approach 1:
The patent applies local quality by enabling different access policies at different base stations within the same network. CSG base stations provide member-only access with preferential billing, hybrid base stations provide selective access based on specific criteria, and open base stations provide universal access. This local differentiation allows flexible access control and billing arrangements tailored to each base station's requirements.
Solution Approach 2:
The patent introduces CSG IDs and access policy indicators as intermediaries between mobile devices and base stations. These intermediaries carry information about membership status and access policies, enabling mobile devices to automatically differentiate between base station types and select appropriate targets without complex manual configuration or negotiation.
3Reliability
If base stations restrict access to authorized devices only, then security and resource control are improved, but mobile device ability to identify and access appropriate base stations deteriorates
Solution Approach 1:
The patent uses CSG IDs and access policy indicators as identifying markers (analogous to color changes) that base stations broadcast to indicate their access policy type. Mobile devices detect these markers to quickly identify whether a base station is CSG, hybrid, or open type, enabling easy differentiation and selection without requiring complex authentication protocols before identification.
Solution Approach 2:
The patent implements feedback by having base stations broadcast their CSG ID and access policy indicator to mobile devices. Mobile devices use this feedback information to determine compatibility with their membership status and generate appropriate selection preferences, creating a closed-loop identification and selection process.
Data Source
AI summary
Systems and methodologies are described that facilitate distributing and/or utilizing a Closed Subscriber Group (CSG) Identifier (ID) that identifies a CSG corresponding to a base station and a CSG indication that distinguishes between the base station permitting access to members of the CSG and permitting access to members and non-members of the CSG. For instance, the CSG ID can uniquely identify the CSG corresponding to the base station. A mobile device can receive the CSG ID and the CSG indication from the base station. Further, the received CSG ID can be compared to CSG IDs included in an allowed CSG list to recognize whether the mobile device is a member or a non-member of the CSG. Moreover, a preference for selecting the base station as compared to a disparate base station can be generated as a function of the received CSG ID and CSG indication.