Dynamic Spectrum Sharing for Terrestrial-Satellite Networks
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Solution Overview
Problem
Existing communication systems face inefficiencies in spectrum allocation between terrestrial and non-terrestrial networks, leading to potential interference and suboptimal usage of frequency bands.
Innovation Solution
A method for spectrum sharing among terrestrial and non-terrestrial networks involves assigning different bandwidth parts based on signal strength, with overlapping and non-overlapping configurations to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spectrum is dedicated for either terrestrial or non-terrestrial communications, then interference is avoided, but spectrum utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic spectrum sharing where bandwidth parts are dynamically assigned to terrestrial or non-terrestrial networks based on real-time signal strength measurements. The terrestrial network and non-terrestrial network can flexibly switch between using the same frequency resources or different frequency resources, transforming the static dedicated spectrum allocation into a dynamic shared allocation that adapts to changing channel conditions.
Solution Approach 2:
The patent changes the parameter of frequency allocation from fixed to variable by introducing signal strength-based decision-making. When terrestrial signal strength is high, the terrestrial network uses the full bandwidth; when it is low, the non-terrestrial network can use the same or overlapping bandwidth parts, thus changing the spectral parameters dynamically to resolve the contradiction between avoiding interference and improving utilization.
2Productivity
If the same frequency band is reused for both terrestrial and non-terrestrial networks, then spectrum utilization efficiency is improved, but interference between networks increases
Solution Approach 1:
The patent segments the total bandwidth into multiple bandwidth parts (BWPs) that can be independently allocated. Instead of treating the entire frequency band as a single resource, the system divides it into smaller units (first bandwidth part, second bandwidth part, third bandwidth part) that can be selectively assigned to terrestrial or non-terrestrial networks based on signal strength conditions, thereby reducing mutual interference while maintaining high utilization.
Solution Approach 2:
The patent applies local quality by allowing different portions of the spectrum (different bandwidth parts) to have different allocation characteristics based on local signal strength conditions. In regions where terrestrial signal is strong, terrestrial BWPs are used; in regions where terrestrial signal is weak, non-terrestrial BWPs are used, creating locally optimized spectrum usage that minimizes interference.
Data Source
AI summary
Various arrangements for spectrum sharing among a terrestrial network and a non-terrestrial network are presented herein. A first bandwidth part having a first frequency range for may be assigned use for communication between one or more UE of a plurality of UE and a terrestrial cellular network when a high signal strength is present. A second bandwidth part having a second frequency range may be assigned for use for communication between one or more UE of the plurality of UE and the terrestrial cellular network when a low signal strength is present. A third bandwidth part having a third frequency range can be assigned for use for communication between one or more UE of the plurality of UE and a non-terrestrial network. The third bandwidth part can overlap with the first bandwidth part but not the second bandwidth part.