Base Station Coordination for Cross-Link Interference Cancellation
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Solution Overview
Problem
Conventional wireless communication systems face challenges in managing cross-link interference between base stations, which degrades link quality and network efficiency due to overlapping air interface resources and direct line-of-sight issues, especially in advanced systems like 5G NR.
Innovation Solution
Forming base-station coordination sets where base stations share I/Q data, scheduling information, and beamforming data to accurately model and cancel cross-link interference by reconstructing interfering signals and adjusting resource allocations dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations independently manage wireless communications without coordination, then device complexity is reduced, but cross-link interference degrades link quality and network efficiency
Solution Approach 1:
Multiple base stations are merged into a coordination set that functions as a unified system. The base stations share I/Q data, scheduling information, and beamforming data through inter-base station interfaces, enabling them to collectively manage and cancel cross-link interference as if they were a single coordinated entity.
Solution Approach 2:
An interference cancellation mechanism acts as an intermediary between transmitting and receiving base stations. The receiving base station uses I/Q data from the transmitting base station to reconstruct interfering signals and subtract them from received signals, effectively mediating the interference problem between the two base stations.
2Measurement precision
If base stations exchange I/Q data and coordination information, then cross-link interference cancelation accuracy is improved, but information loss and processing overhead increase
Solution Approach 1:
The patent extracts only the essential information needed for interference cancellation from the complete base station data. Specifically, I/Q data representing the interfering signal characteristics is extracted and transmitted to coordinating base stations, rather than transmitting all scheduling and configuration data.
Solution Approach 2:
Base stations create and exchange copies of I/Q data that represent interfering signals. These copied signal representations allow receiving base stations to reconstruct and cancel interference without needing to process the original complex transmission data.
3Productivity
If base stations dynamically adjust resource allocations for interference mitigation, then network efficiency is improved, but device complexity and processing requirements increase
Solution Approach 1:
The coordination set implements dynamic resource allocation where base stations continuously adjust their transmissions based on real-time interference conditions. Scheduling decisions, beamforming configurations, and resource allocations are dynamically modified to minimize cross-link interference while maintaining network throughput.
Solution Approach 2:
A feedback mechanism is established where base stations monitor interference levels and exchange information about transmission conditions. This feedback loop enables base stations to adjust their resource allocations and transmission parameters based on actual interference experiences, continuously optimizing network performance.
Data Source
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AI summary
Techniques and apparatuses are described for enabling base stations (121, 122) to coordinate for canceling cross-link interference (380). The techniques and apparatuses described herein overcome challenges that a single base station (121) might otherwise face in trying to compensate a reception (131) by the base station (121) for cross-link interference (382) from a transmission (132) by another base station (122). The techniques and apparatuses described herein enable the base stations (121, 122) to form coordination sets to exchange information to enable the base stations (121, 122) to accurately reconstruct cross-link interference (380) and ultimately cancel the cross-link interference (380) to improve link quality.