Closed-Loop EIRP Control in 5G NR Base Stations for C-Band Interference
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Solution Overview
Problem
Existing 5G NR deployments cause significant interference with C-Band satellite ground stations due to overlapping frequency ranges, leading to suboptimal configurations and revenue loss, with current interference mitigation methods failing to perform dynamic closed-loop assessments.
Innovation Solution
A system and method for determining optimal equivalent isotropically radiated power (EIRP) and tilt configurations for 5G base stations to maintain interference levels within allowed margins, using predictive models like ITU P.452-16 to assess and adjust EIRP and tilt dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 5G NR base stations operate at high power in sub6 frequency range, then coverage and capacity are improved, but interference to C-Band satellite ground stations increases causing receiver failures and signal degradation
Solution Approach 1:
The patent implements dynamic closed-loop interference mitigation by continuously monitoring interference levels at satellite ground stations and adjusting 5G base station configurations (EIRP and tilt) in real-time. This dynamic adjustment allows the system to optimize 5G performance while preventing harmful interference to satellite operations, resolving the contradiction between high power operation and interference mitigation.
Solution Approach 2:
The system changes key parameters (equivalent isotropically radiated power and antenna tilt angle) of 5G base stations based on real-time interference assessment. By dynamically adjusting these parameters within optimal ranges, the system maintains 5G network productivity while keeping interference to satellite ground stations below harmful thresholds.
2Ease of manufacture
If static power and tilt configurations are used for 5G base stations, then deployment is simplified, but interference mitigation is suboptimal causing revenue loss and poor customer perception
Solution Approach 1:
The patent implements a self-service system where 5G base stations automatically adjust their own configurations based on real-time interference feedback from satellite ground stations. The system autonomously performs closed-loop assessment and optimization without requiring manual intervention, maintaining deployment simplicity while achieving reliable dynamic interference mitigation.
Solution Approach 2:
The system establishes a feedback loop where interference levels at satellite ground stations are continuously monitored and fed back to control 5G base station configurations. This feedback mechanism enables the system to maintain simple deployment procedures while achieving reliable interference mitigation through automatic real-time adjustments.
3Device complexity
If cumulative interference levels are not dynamically assessed, then system complexity is reduced, but satellite ground stations experience unwanted interference causing gain compression, lock failures, and saturation
Solution Approach 1:
The patent implements a closed-loop feedback system that continuously assesses cumulative interference levels at satellite ground stations and dynamically adjusts 5G base station configurations. This feedback mechanism prevents harmful interference effects (gain compression, lock failures, saturation) while maintaining manageable system complexity through automated real-time monitoring and adjustment.
Data Source
AI summary
A method of mitigating interference in a 5th generation (5G) new radio (NR) environment includes determining a cumulative interference level margin corresponding to at least one satellite ground station and at least one base station, determining whether the cumulative interference level margin is less than or equal to a maximum allowed interference margin for the at least one satellite ground station, based on determining that the cumulative interference level margin is less than or equal to the maximum allowed interference margin, determining at least one of an optimal equivalent isotopically radiated power (EIRP) for the at least one base station and an optimal tilt for the at least one base station, and configuring the at least one base station based on at least one of the optimal EIRP and the optimal tilt configuration.