3D Spectrum Access System Elevation Angle Interference Control
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Solution Overview
Problem
Traditional Spectrum Access Systems (SAS) in the 3.5 GHz band are not adequately designed to protect satellites from interference, as they primarily operate from a 2D perspective, neglecting elevation angles which can increase interference risks, especially for satellite systems in the C band and mmWave bands.
Innovation Solution
The implementation of a 3D SAS system that incorporates both azimuth and elevation angle data, using multiple antenna array beamforming and database functionalities to detect satellite presence and adjust spectrum allocation and transmission power to minimize interference, by evolving the traditional 2D SAS to a 3D system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional 2D SAS system is used for spectrum allocation, then the system complexity is low and operation is simple, but satellite interference protection is insufficient
Solution Approach 1:
The patent transitions from a traditional 2D spectrum allocation system to a 3D SAS system by adding the elevation angle dimension. This enables the system to consider both azimuth and elevation angles when allocating spectrum, thereby providing comprehensive satellite interference protection while maintaining manageable system complexity through structured processing of the additional dimensional data.
2Object-affected harmful factors
If elevation angle data is incorporated into spectrum allocation, then satellite protection is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The patent introduces intermediary components including a database that stores satellite orbital information and elevation angle data, and a processor that calculates elevation angles based on satellite positions and device locations. These intermediaries facilitate the measurement and utilization of elevation angle data without requiring direct complex measurements at each device.
3Productivity
If 3D spectrum allocation with multiple antenna array beamforming is implemented, then spectrum sharing efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal 3D SAS system that serves multiple functions: spectrum allocation, interference management, satellite protection, and coordination of multiple antenna arrays. This multi-functional approach improves spectrum sharing efficiency across different scenarios and devices while consolidating complexity into a centralized controller rather than distributing it across individual devices.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces interference to satellites by optimizing spectrum allocation and transmission power based on elevation angles, ensuring efficient sharing of the 3.5 GHz band while protecting satellite systems, and can be applied to other bands like C and mmWave.
Implementation Method 1
using multiple antenna array beamforming to detect satellite presence and adjust spectrum allocation
Data Source
AI summary
According to various examples, a network controller is described comprising a determiner configured to determine, based on an elevation angle of a direction of a communication between a first communication device and a second communication device, a risk of interference to a third communication device by the communication and a controller configured to control the communication between the first communication device and the second communication device based on the determined risk.