Measurement-Based Protection for Satellite Spectrum Utilization
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Solution Overview
Problem
Current satellite service protection schemes for fixed satellite services (FSS) are inefficient due to conservative interference protection rules and inaccurate propagation models, leading to over-protection and under-utilization of the C-band downlink spectrum, as they cannot accurately measure actual path loss between transmitters and receivers, especially with obstructions and seasonal changes.
Innovation Solution
A measurement-based protection (MBP) system is introduced, using beacon transmitters and detectors to create a closed-loop system that measures actual path loss in real-time, allowing for accurate propagation modeling and dynamic adaptation to environmental changes, thereby optimizing spectrum use without impairing satellite receiver protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conservative interference protection rules and inaccurate propagation models are used, then satellite receiver protection is ensured, but spectrum utilization is reduced
Solution Approach 1:
The patent implements a feedback mechanism where beacon detectors at FSS sites measure actual path loss of beacon signals from access points and report these measurements to a central server. The server uses this real-time feedback to dynamically adjust interference protection parameters, replacing static conservative models with measured actual conditions. This allows the system to maintain reliable satellite protection while optimizing spectrum utilization based on real-world path loss data.
Solution Approach 2:
The patent replaces the mechanical/mathematical propagation models (which are inaccurate and conservative) with actual electromagnetic field measurements using beacon detectors. Instead of relying on theoretical models to predict path loss, the system directly measures the actual electromagnetic signal attenuation experienced at FSS sites, providing accurate real-time data for interference management.
2Ease of operation
If propagation models are used to determine path loss, then interference protection can be calculated, but measurement precision is insufficient due to obstructions and seasonal changes
Solution Approach 1:
The patent enables the FSS sites themselves to perform path loss measurements using beacon detectors co-located with the satellite receivers. Each FSS site autonomously measures the actual path loss of beacon signals from nearby access points and reports findings to the central server. This self-measuring approach captures local environmental conditions (obstructions, seasonal changes) that external models cannot predict, significantly improving measurement precision.
3Device complexity
If static interference protection rules are applied, then implementation is simple, but adaptability to environmental changes is poor
Solution Approach 1:
The patent transforms the static interference protection system into a dynamic one by continuously measuring actual path loss using beacons and updating protection parameters in real-time. The central server receives ongoing measurements from beacon detectors and dynamically adjusts interference thresholds and access point authorization decisions based on current environmental conditions. This dynamic adaptation allows the system to respond to seasonal changes, new obstructions, and other environmental variations while maintaining operational simplicity through automated processes.
Data Source
AI summary
A communication system includes an earth station configured to receive a downlink transmission from a satellite and transmit an uplink transmission to the satellite. The communication system further includes a server in operable communication with the earth station, a beacon detector in operable communication with the server, an access point configured to operate within a proximity of the earth station, and a beacon transmitter disposed within close proximity to the access point. The beacon transmitter is configured to transmit a beacon signal to one or more of the server and the beacon detector. The beacon signal uniquely identifies the access point. The server is configured to implement a measurement-based protection scheme with respect to at least one of the downlink transmission and the uplink transmission.