Beamformed Dynamic Spectrum Sharing for Low-Interference Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face inefficiencies in utilizing available radio spectrums due to interference from other radio signal sources, particularly in dynamic spectrum sharing environments, where traditional methods like Listen-Before-Talk (LBT) are insufficient for optimal frequency and spatial direction selection.
Innovation Solution
A spectrum management tool employs beamforming techniques to identify and utilize spatial directions and frequency bands with minimal interference by analyzing dynamic and static data, using a GUI to visualize interference patterns, and configuring antenna arrays to transmit signals with focused energy in optimal directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional Listen-Before-Talk (LBT) methods are used for spectrum access, then system simplicity is maintained, but spectrum utilization efficiency deteriorates due to insufficient interference management and spatial direction selection
Solution Approach 1:
The patent introduces spatial direction as a new dimension for spectrum sharing, moving beyond traditional frequency and time domain approaches. By utilizing beamforming technology, the system transmits signals in specific spatial directions, effectively adding a spatial dimension to spectrum utilization. This allows multiple users to share the same frequency band simultaneously by transmitting in different spatial directions, thereby improving spectrum utilization efficiency without causing interference.
Solution Approach 2:
The patent segments the radio spectrum into multiple spatial channels using beamforming technology. Instead of treating the spectrum as a single resource, the system divides it into multiple directional beams, each capable of carrying independent data streams. This segmentation allows simultaneous transmission in different spatial directions, resolving the contradiction between spectrum utilization and interference management.
2Object-affected harmful factors
If beamforming techniques are implemented for spatial selectivity, then interference management improves, but device complexity increases due to multiple antenna elements and signal processing requirements
Solution Approach 1:
The patent makes the antenna array perform multiple functions: both transmission and reception, as well as spatial filtering and beamforming. The same antenna elements used for signal transmission also serve for receiving signals and detecting spatial interference patterns. This multi-functionality reduces the need for separate components, thereby managing complexity while achieving spatial selectivity and interference management.
Solution Approach 2:
The beamforming system performs self-configuration and adaptive adjustment based on detected spatial interference patterns. The system automatically identifies optimal transmission directions and adjusts beamforming weights without requiring manual intervention or complex external control mechanisms. This self-service capability reduces operational complexity while maintaining effective interference management.
3Adaptability or versatility
If dynamic spectrum sharing is implemented without spatial consideration, then frequency band availability improves, but signal quality deteriorates due to interference from other radio signal sources
Solution Approach 1:
The patent applies local quality by directing signals with specific characteristics (beamforming weights and phases) toward specific spatial directions or target users. Each user receives a customized signal tailored to their spatial location, while signals in other directions are suppressed. This localized signal optimization maintains high signal quality for each user while enabling flexible spectrum sharing across different spatial regions.
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 enables more efficient use of unlicensed and shared radio spectrums by minimizing interference, thereby optimizing signal transmission in dynamic spectrum sharing scenarios.
Implementation Method 1
Beamforming uses multiple antenna elements in an array to focus antenna energy in a narrow beam and control the direction of the wave front of the transmitted radio signal by appropriately weighting the magnitude and phase of individual antenna signals
Data Source
Figure 1
Figure 2A~2B
Figure 3~4
AI summary
Techniques for identifying wireless transmission opportunities that are made available by beamforming is provided. In addition to identifying frequency bands and time divisions that are available for transmitting radio signals, beamforming capabilities of communications systems are used to identify a spatial direction that is available for transmitting radio signals in a particular frequency band. A spectrum management tool identifies the available spatial directions, frequency bands, and time divisions for transmission in a dynamic spectrum sharing environment, and a radio transmitting device is configured by the tool to transmit in the identified available spatial directions, frequency bands, and time divisions.