IoT Satellite Backhaul Interference Avoidance
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Solution Overview
Problem
Wireless communication systems face challenges in minimizing interference, especially when mobile transmitters move into environments using the same frequency bands as existing communication systems, leading to potential interference with incumbent receivers, which can degrade performance and violate regulatory standards.
Innovation Solution
A satellite-based backhaul system that uses a satellite communication terminal to allow IoT devices to be deployed anywhere with a line of sight, employing automated adjustment of the terminal's placement, orientation, and communication characteristics to avoid interference with other wireless communication networks by calculating and applying protection zones to ensure non-interfering frequency bands and spatial diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mobile transmitters use the same frequency bands as existing communication systems, then communication coverage and accessibility are improved, but interference with incumbent receivers increases
Solution Approach 1:
The system segments the frequency spectrum into protected bands and available bands by implementing frequency coordination. Incumbent systems are assigned specific frequency bands that are protected from interference, while mobile transmitters use different frequency bands. This segmentation allows both systems to coexist without harmful interference, resolving the contradiction between improved communication coverage and reduced interference.
Solution Approach 2:
The system introduces spatial dimensionality through protection zones and coordination areas. By defining three-dimensional spherical protection zones around incumbent receivers and corresponding coordination areas for mobile transmitters, the system creates spatial separation in addition to frequency separation. This dimensional approach enables mobile transmitters to operate in coverage areas that do not spatially overlap with protected zones, thereby improving coverage while preventing interference.
2Object-affected harmful factors
If protection zones are calculated and applied to avoid interference, then interference with incumbent systems is reduced, but system complexity increases
Solution Approach 1:
The system performs preliminary calculation of protection zones and coordination areas before mobile transmitters begin operation. By pre-calculating the spherical protection zones around incumbent receivers and determining the corresponding coordination areas where mobile transmitters can safely operate, the system establishes interference avoidance mechanisms in advance. This preliminary action simplifies ongoing operations, as transmitters can reference pre-computed coordination areas rather than performing real-time interference calculations.
Solution Approach 2:
The system uses simplified geometric models (spherical protection zones) rather than complex electromagnetic field simulations. By approximating protection zones as simple spheres based on receiver sensitivity and transmitter power characteristics, the system achieves adequate interference protection with computationally inexpensive calculations. This approach trades some precision for dramatically reduced computational complexity, making the system practical for deployment.
3Object-affected harmful factors
If automated adjustment of terminal placement and orientation is implemented, then interference avoidance is improved, but device complexity and cost increase
Solution Approach 1:
The system implements automated calculation and adjustment of terminal placement and orientation within coordination areas. Mobile transmitters autonomously determine their position relative to protection zones and automatically adjust their operating parameters to remain within allowed coordination areas. This self-service capability eliminates the need for manual interference coordination and reduces operational complexity, as the system automatically manages interference avoidance while maintaining coverage.
Data Source
AI summary
In one embodiment, the techniques herein provide a fully automated satellite-based backhaul system. In particular, a system in accordance with the techniques herein may utilize a satellite communication terminal to allow an Internet of Things (IoT) device (or any device) to be deployed in any location which has a line of sight towards a communication satellite. Specifically, the placement, orientation, and/or communication characteristics of the IoT device and/or satellite communication terminal (or antenna) may be manipulated (e.g., manual adjustment based on calculated directions and/or completely autonomously) to ensure avoidance of interference in any other wireless communication network.