Co-Band Mobility Interference Measurement During Satellite Overpass
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Co-channel and adjacent channel interference between terrestrial and non-terrestrial networks sharing radio frequency bands degrades signal-to-interference-and-noise ratio (SINR), leading to reduced spectral efficiency and poor quality of experience for subscribers, which is difficult to measure directly.
Innovation Solution
A method and device to estimate co-channel and adjacent channel interference by using an orthogonal channel noise simulator (OCNS) function to generate full-bandwidth noise signals during a test interval, logging bitrate differences, and initiating remedial actions to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terrestrial and non-terrestrial networks share radio frequency bands, then network coverage and capacity are improved, but channel interference increases degrading signal quality and spectral efficiency
Solution Approach 1:
The patent introduces an orthogonal channel noise simulator (OCNS) function as an intermediary mechanism. This simulator generates full-bandwidth noise signals that act as a controlled interference model, allowing the system to measure and evaluate the actual impact of co-band mobility on terrestrial network performance without requiring direct measurement of satellite interference. The OCNS serves as a mediator between the satellite signal and the measurement system.
Solution Approach 2:
The system implements a feedback mechanism by continuously monitoring bitrate performance metrics during satellite overpass events. When interference is detected (bitrate degradation exceeds threshold), the system triggers remedial actions such as adjusting terrestrial network parameters or satellite beam configurations. This closed-loop feedback enables dynamic optimization of network performance despite shared spectrum usage.
2Measurement precision
If satellite generates full-bandwidth noise signals for testing, then interference measurement capability is improved, but network performance during test interval deteriorates
Solution Approach 1:
The OCNS function is activated periodically during scheduled test intervals rather than continuously. These test intervals are timed to occur during satellite overpass events when interference measurement is most valuable. By using periodic activation, the system achieves accurate interference measurement capability while minimizing the total time that network performance is degraded, as the noise generation is confined to specific measurement windows.
Solution Approach 2:
The system performs preliminary actions by scheduling and executing test intervals in advance during predicted satellite overpass times. Base stations and satellites coordinate beforehand to activate OCNS during these predetermined windows, allowing the system to prepare measurement activities without disrupting normal operations during non-test periods. This preliminary planning ensures that interference measurements are captured at optimal moments while maintaining normal service quality otherwise.
Data Source
AI summary
A method includes recording a first bitrate of a data transfer session between a user endpoint device and a network element of a terrestrial mobile network, wherein the user endpoint device is locked into a radio frequency band of the terrestrial mobile network, recording a second bitrate of the data transfer session, during a test interval in which a satellite of a non-terrestrial network that shares the radio frequency band with the terrestrial mobile network is executing a function that generates a data transmission to generate full-bandwidth noise signals, calculating a difference between the first bitrate that is recorded and the second bitrate that is recorded, and initiating, in response to the difference exceeding a threshold, an action to modify a parameter of at least one of the terrestrial mobile network or the non-terrestrial network to reduce an effect of channel interference resulting from the sharing of the radio frequency band.