Terrestrial–Non-Terrestrial BWP Allocation for Shared-Frequency Interference
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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 specific bandwidth utilization schemes for terrestrial and non-terrestrial networks, including dividing coverage areas into regions and assigning different bandwidth parts based on user device location and channel quality indicators, and adjusting transmit power and priority levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terrestrial network and non-terrestrial network use the same frequency band, then spectrum utilization is improved, but communication interference increases
Solution Approach 1:
The patent segments the frequency band into different bandwidth parts (BWPs) for terrestrial and non-terrestrial networks. Each network type is assigned specific sub-bands within the shared frequency range, allowing simultaneous operation while minimizing interference through frequency domain separation.
Solution Approach 2:
The patent applies different transmission characteristics to different geographic regions. Border cells near the exclusion zone use reduced transmit power and specific BWP configurations, while interior cells use standard configurations. This local adaptation optimizes spectrum utilization while controlling interference in critical transition zones.
2Reliability
If bandwidth utilization schemes are optimized for interference mitigation, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic bandwidth part selection and transmit power adjustment based on real-time channel conditions and user device locations. The system adapts BWP assignments and power levels dynamically, allowing reliable communication while managing complexity through automated, condition-based decision-making rather than static complex configurations.
Solution Approach 2:
User devices autonomously determine their location relative to exclusion zones and select appropriate bandwidth parts based on pre-configured schemes. The system provides self-service through automated BWP selection and power control algorithms that operate without continuous network intervention, improving reliability while keeping system complexity manageable.
Data Source
AI summary
Systems and methods for mitigating terrestrial network downlink transmission interference on non-terrestrial network downlink transmissions or mitigating non-terrestrial network downlink transmission interference on terrestrial network downlink transmissions. The system may determine that terrestrial network downlink transmissions for a terrestrial network and non-terrestrial network downlink transmissions for a non-terrestrial network utilize a same frequency band. An exclusion zone is generated from the coverage areas of the terrestrial cells. A first bandwidth utilization scheme is selected for first user devices within the exclusion zone, and a second bandwidth utilization scheme is selected for second user devices near the exclusion zone. The non-terrestrial network satellite is instructed to utilize the first bandwidth utilization scheme for non-terrestrial network downlink transmissions with the first user devices, and border terrestrial network cells are instructed to utilize the second bandwidth utilization scheme for terrestrial network downlink transmissions to the second user devices.