Protected Area Contour Generation for Frequency Sharing
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Solution Overview
Problem
Current methods for frequency sharing fail to effectively generate a protected area contour that allows secondary services to use frequencies without interfering with primary services, particularly in scenarios where the location of secondary wireless stations is unspecified or the orientation of primary service antennas is unknown.
Innovation Solution
A method and apparatus for generating a protected area contour by calculating the interference-to-noise ratio (INR) around a primary wireless station, setting an analysis area based on INR values, and creating a contour that excludes interferers within a specified distance, using scanning methods like linear and circular scanning, and adjusting for different ground elevations and antenna orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequency sharing is implemented without specifying secondary station locations or primary antenna orientations, then frequency band utilization is improved, but interference control between primary and secondary services deteriorates
Solution Approach 1:
The patent performs preliminary calculation of protected area contours before actual frequency sharing operations. By pre-calculating the INR values and determining exclusion zones based on primary service parameters (without requiring secondary station locations), the system establishes interference protection boundaries in advance, enabling flexible frequency sharing while maintaining interference control
Solution Approach 2:
The patent introduces protected area contours as an intermediary concept between primary and secondary services. These contours, defined by INR thresholds, act as virtual boundaries that automatically prevent harmful interference without requiring direct knowledge of secondary station locations or primary antenna orientations, thus resolving the contradiction between adaptability and interference control
2Measurement precision
If protected area contours are generated using INR calculation and analysis area scanning, then interference protection accuracy is improved, but computational complexity and processing time increase
Solution Approach 1:
The patent divides the surrounding area into discrete analysis areas with specific resolutions (e.g., 100m x 100m grids). By segmenting the continuous space into manageable units and calculating INR values for each segment, the system achieves accurate protected area delineation while keeping computational complexity tractable through systematic processing of divided regions
Solution Approach 2:
The patent allows dynamic adjustment of analysis area parameters such as resolution, scanning range, and INR thresholds. By changing these parameters based on specific deployment scenarios, the system can balance between protection accuracy and computational complexity, generating appropriate protected area contours without always requiring maximum computational resources
Data Source
AI summary
A method of generating a protected area contour for frequency sharing is disclosed. The method of generating a protected area contour for frequency sharing, according to an embodiment, may include: calculating, for a first wireless station, an interference-to-noise ratio (INR) that is an effect of interference by a second wireless station sharing a frequency band with the first wireless station; setting an analysis area in which the interference is predicted to occur in a surrounding area of the first wireless station based on the INR; and generating a protected area contour of the first wireless station based on the analysis area and the INR.