NTN Uplink Orthogonalization for TN Co-Channel Interference
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Solution Overview
Problem
Non-terrestrial network (NTN) communications face interference challenges due to overlapping spectrum usage with terrestrial networks, leading to degraded service quality, reduced data throughput, increased latency, and network unreliability.
Innovation Solution
Implement scheduled orthogonalization schemes, including time-based, frequency-based, and code-based methods, to coordinate terrestrial radio access network (T-RAN) and non-terrestrial RAN (NT-RAN) communications, ensuring orthogonality in time, frequency, or code to mitigate co-channel interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-terrestrial network (NTN) communications use overlapping spectrum with terrestrial networks, then spectrum efficiency is improved, but co-channel interference increases leading to degraded service quality
Solution Approach 1:
The patent segments the spectrum usage by introducing orthogonalization dimensions (time, frequency, code) to divide the shared spectrum into separate communication channels. This allows multiple networks to operate simultaneously without interference, resolving the contradiction between spectrum efficiency and service quality.
Solution Approach 2:
The patent implements dynamic orthogonalization schemes that can be scheduled and adjusted in real-time based on network conditions. This dynamic approach allows the system to adaptively manage spectrum resources while maintaining service quality, enabling both high spectrum efficiency and reliable communication.
2Reliability
If scheduled orthogonalization schemes are implemented to mitigate co-channel interference, then service quality and network reliability are improved, but system complexity increases
Solution Approach 1:
The patent creates a universal orthogonalization framework that can be applied across different network types (terrestrial and non-terrestrial) and different orthogonalization dimensions (time, frequency, code). This multi-functional approach standardizes interference mitigation, reducing overall system complexity despite the sophisticated interference management requirements.
3Reliability
If temporal orthogonalization is applied to separate TN and NTN communications, then co-channel interference is reduced, but temporal efficiency decreases
Solution Approach 1:
The patent introduces additional orthogonalization dimensions (frequency and code) to compensate for the temporal efficiency loss. By operating in multiple dimensions simultaneously, the system achieves interference mitigation without sacrificing overall communication efficiency, as resources can be allocated across different dimensions rather than being strictly time-separated.
Data Source
AI summary
Approaches are described herein for mitigating terrestrial network (TN) uplink and downlink co-channel interference on non-terrestrial network (NTN) uplinks using scheduled orthogonalization. The scheduled orthogonalization can include temporal, spectral, and/or code-based orthogonalization. For example, there is a terrestrial radio access network (T-RAN) and a non-terrestrial RAN (NT-RAN) having some amount of coordination. For each TN cell in each of several temporal frames, a determination is made as to whether there is a potential co-channel interference condition between the TN cell and an NTN beam for that temporal frame. If so, a first orthogonalization scheme is scheduled for application to the TN communications for the cell in the temporal frame, and a second orthogonalization scheme is scheduled for application to the NTN communications for the beam in the temporal frame, such that the first and second orthogonalization schema are orthogonal in at least one of time, frequency, or code.