Base Station Access Control via Terminal Location Topology
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Solution Overview
Problem
In wireless communication systems, access terminals often experience signal degradation and inferior call fidelity due to varying physical topologies within sectors, leading to failed access attempts when they are located at the periphery of sectors with urban areas, where signal interference is significant, and not within the fixed access search window defined by base stations.
Innovation Solution
A method and system where a base station determines the physical location of an access terminal within a sector and assesses access requests based on this location, using a location system to obtain topographical information and distance thresholds specific to different topologies, allowing for dynamic adjustment of access window sizes and handoff decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a base station uses a fixed access search window to determine whether to accept access requests, then the base station can maintain simple operation and consistent access control, but access terminals in urban areas with signal degradation experience inferior call fidelity and failed access attempts
Solution Approach 1:
The patent implements dynamic access search windows by adjusting the window size based on the access terminal's location within the sector and the physical topology characteristics. Instead of using a fixed window, the system dynamically modifies the access search window parameters to match the signal conditions in different areas (urban vs. lake areas), thereby improving call fidelity while maintaining operational simplicity through automated adjustments.
2Adaptability or versatility
If the base station accepts all access requests within the fixed access search window, then all terminals within range can potentially access the network, but terminals in urban areas with interfering structures experience signal degradation and access failures
Solution Approach 1:
The patent applies local quality by differentiating access control parameters based on the specific location and topology within the sector. The system identifies whether an access terminal is in an urban area with interfering structures or a lake area without structures, and applies appropriate access search window settings for each location type. This localized approach allows the system to be more flexible and adaptive to local conditions while maintaining high access success rates.
3Productivity
If the base station uses a larger access search window to capture more access terminals, then more terminals can access the network, but the processing load and complexity of managing diverse access conditions increase
Solution Approach 1:
The patent segments the sector into different topological regions (urban areas with structures, lake areas without structures) and applies different access search window configurations to each segment. This segmentation allows the system to manage diverse access conditions more effectively by treating each region according to its specific characteristics, thereby increasing overall access capacity without proportionally increasing management complexity.
Data Source
AI summary
The present invention provides a method and system for determining whether to accept an access request from an AT. In an embodiment of the invention, a base station receives an access request from an AT that is located within a sector served by the base station. In response to receiving the access request, the base station obtains the physical location of the AT within the sector. The base station then determines whether to accept the access request based on the physical location of the AT within the sector.