Spectrum Blanking Control for NTN Wireless Interference
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Solution Overview
Problem
In wireless communication environments with both terrestrial and non-terrestrial networks, interference occurs due to the use of the same or adjacent frequencies by multiple antennas, causing reliability issues and inefficient spectrum utilization.
Innovation Solution
A system that uses a spectrum scheduler to determine channel quality and adjust spectrum blanking ranges based on signal strength, elevation, and distance to mitigate interference, allowing efficient coexistence of terrestrial and non-terrestrial networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same or adjacent frequencies are used by multiple antennas (terrestrial and non-terrestrial), then spectrum utilization is improved, but interference increases causing reliability issues
Solution Approach 1:
The patent applies local quality by determining device-specific spectrum blanking ranges based on individual device characteristics including location, elevation angle to satellite, distance to satellite, and signal strength. Each device receives customized spectrum allocation rather than uniform treatment, allowing optimal spectrum utilization while minimizing interference for each specific device context
Solution Approach 2:
The patent implements dynamics by making spectrum blanking ranges adjustable and adaptive rather than static. The network device dynamically determines and updates spectrum blanking ranges based on changing conditions such as device location, satellite elevation angle, distance, and signal strength measurements, allowing the system to adapt to varying interference conditions in real-time
2Reliability
If spectrum blanking ranges are increased to reduce interference, then reliability is improved, but available spectrum for communication decreases
Solution Approach 1:
The patent resolves this contradiction by implementing location-specific and device-specific spectrum blanking ranges. Instead of applying uniform blanking across all devices, the system determines customized blanking ranges based on each device's location, elevation angle, distance to satellite, and signal strength. This allows minimal blanking where interference is low and maximal blanking only where necessary, optimizing both reliability and spectrum availability
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting spectrum blanking ranges based on multiple variables including device location, satellite elevation angle, distance to satellite, and signal strength measurements. By changing these parameters adaptively, the system optimizes the balance between interference reduction and spectrum utilization for each specific condition
3Area of stationary object
If satellites serve larger geographic regions than cellular towers, then coverage area is improved, but interference management complexity increases due to more towers serving the same region
Solution Approach 1:
The patent implements feedback mechanisms where the network device receives signal strength measurements from devices communicating with satellites and uses this feedback to determine appropriate spectrum blanking ranges. The system continuously monitors communication quality and adjusts spectrum allocation based on measured interference levels, creating a closed-loop control system that manages complexity through adaptive response to actual conditions
Solution Approach 2:
The patent applies self-service by enabling devices to autonomously measure signal strength and communicate these measurements to the network device, which then automatically determines and applies appropriate spectrum blanking ranges. The system self-adjusts to interference conditions without requiring manual configuration, reducing management complexity while handling large-scale satellite-terrestrial coexistence
Data Source
AI summary
An example system and method may manage interference for wireless devices in a non-terrestrial network environment. An example system may determine spectrum blanking ranges for a wireless client device, where the spectrum blanking range restricts wireless frequencies in the spectrum blanking range from being assigned to wireless client devices by ground node. The system may determine a signal quality indicator value for a wireless client device, determine an assignable spectrum range for the wireless client device based on the signal quality indicator value and the spectrum blanking range(s), and assign a channel to the wireless client device using the assignable spectrum range.