Terrestrial–Non-Terrestrial Bandwidth Allocation for Interference Mitigation

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Solution Overview

Problem

Cellular devices experience communication collisions and interference due to using specific frequencies for terrestrial and non-terrestrial networks, leading to delayed transmissions.

Innovation Solution

Implementing distinct bandwidth utilization schemes for terrestrial and non-terrestrial networks to mitigate interference, including dividing coverage areas into regions and assigning specific bandwidth parts based on channel quality indicators (CQIs) and transmission priorities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If terrestrial network and non-terrestrial network use the same frequency band, then spectrum utilization is improved, but communication interference increases

Engineering Contradiction:

Improvespectrum utilizationVSAvoidcommunication interference

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the frequency band into multiple bandwidth parts (BWPs) and assigns different BWPs to terrestrial and non-terrestrial networks for uplink and downlink transmissions. This segmentation allows both networks to operate simultaneously on the same frequency band without interfering with each other, thus improving spectrum utilization while eliminating interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different bandwidth allocation strategies to different transmission directions (uplink vs downlink) and different network types (terrestrial vs non-terrestrial). By optimizing the bandwidth quality locally for each specific transmission scenario, the system achieves high spectrum efficiency while preventing interference through differentiated resource allocation.

Inventive Principle:

Principle #3Local quality

2Area of stationary object

If bandwidth is allocated to both terrestrial and non-terrestrial networks, then network coverage is improved, but transmission delays increase due to interference

Engineering Contradiction:

Improvenetwork coverageVSAvoidtransmission delays

Core Design Contradiction:

Area of stationary objectVSLoss of time

Solution Approach 1:

By segmenting the bandwidth into distinct parts for terrestrial and non-terrestrial networks, the patent enables simultaneous operations without mutual interference. This eliminates retransmissions caused by interference, thereby reducing transmission delays while maintaining expanded network coverage.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary bandwidth allocation and coordination between terrestrial and non-terrestrial networks before transmissions occur. By pre-establishing interference-free bandwidth assignments, the system prevents transmission delays that would otherwise result from interference-induced retransmissions.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If same frequency band is used for uplink and downlink, then frequency resource utilization is improved, but interference between networks increases

Engineering Contradiction:

Improvefrequency resource utilizationVSAvoidnetwork interference

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent segments the frequency band into separate bandwidth parts for uplink and downlink transmissions, with different allocations for terrestrial and non-terrestrial networks. This segmentation enables full-duplex operations on the same frequency band while preventing inter-network interference through differentiated resource assignment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the bandwidth allocation parameters dynamically based on transmission direction (uplink/downlink) and network type (terrestrial/non-terrestrial). By adjusting these parameters, the system achieves high frequency resource utilization while maintaining interference-free operations through optimized parameter configuration.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250287217A1Terrestrial and non-terrestrial network interference mitigation

Publication Date: 2025.09.11 BOOST SUBSCRIBERCO LLC

AI summary

Systems and methods for mitigating terrestrial network downlink transmission interference on non-terrestrial network uplink transmissions or mitigating. The system determines that terrestrial network downlink transmissions for a terrestrial network and non-terrestrial network uplink transmissions for a non-terrestrial network utilize a same frequency band. One or more terrestrial cells of the terrestrial network that are in a coverage area of a non-terrestrial network satellite of the non-terrestrial network are identified. The one or more terrestrial network cells are instructed to utilize at least a first bandwidth utilization scheme for terrestrial network downlink transmissions. And the non-terrestrial network satellite of the non-terrestrial network is instructed to utilize a second bandwidth utilization scheme for non-terrestrial network uplink transmissions, wherein the second bandwidth utilization scheme is different from the first bandwidth utilization scheme.