Interference Coordination Region Configuration for Wireless Base Stations
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Solution Overview
Problem
In wireless communications, neighboring base stations' beamforming techniques often result in interference, leading to varying link quality for user equipment (UE) due to scheduling decisions, which can cause high interference levels for UEs under a serving base station.
Innovation Solution
Configuring an interference coordination region within time and frequency resources, using beam-avoidance and beam-preference regions, where base stations prioritize transmissions to avoid interfering beams, reducing unexpected interference by scheduling communications based on long-term network information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If base stations use beamforming techniques for wireless communications, then communication efficiency and data rate are improved, but interference between neighboring base stations increases
Solution Approach 1:
The patent segments time-frequency resources into interference coordination regions and normal regions. By dividing the resource space, the system can apply different scheduling strategies in different regions, allowing beamforming to operate efficiently in normal regions while mitigating interference in coordination regions through coordinated scheduling between neighboring base stations.
Solution Approach 2:
The patent changes the scheduling parameters dynamically based on interference conditions. By configuring interference coordination regions with specific time-frequency resources and adjusting scheduling decisions within these regions, the system modifies operational parameters to reduce interference while maintaining communication efficiency in non-coordination regions.
2Ease of operation
If neighboring base stations schedule transmissions independently, then scheduling flexibility and responsiveness are improved, but link quality varies due to uncoordinated interference
Solution Approach 1:
The patent segments the scheduling domain into interference coordination regions where coordinated scheduling is applied and normal regions where independent scheduling is maintained. This segmentation allows base stations to preserve scheduling flexibility in normal regions while ensuring link quality through coordinated scheduling in coordination regions where interference is managed.
Solution Approach 2:
The patent applies different scheduling qualities to different regions: in interference coordination regions, coordinated scheduling with constrained flexibility is applied to ensure reliability, while in normal regions, fully flexible independent scheduling is maintained. This local differentiation resolves the contradiction by applying the appropriate scheduling strategy where needed.
3Object-generated harmful factors
If interference coordination regions are configured based on long-term information, then interference mitigation is improved, but system adaptability to changing conditions decreases
Solution Approach 1:
The patent uses long-term information to preliminarily configure interference coordination regions and identify interfering beam pairs in advance. This preliminary action establishes a foundation for interference mitigation that can be quickly activated when needed, while the regions can be reconfigured as long-term conditions change, balancing proactive interference management with adaptability.
Solution Approach 2:
The patent makes the interference coordination system dynamic by allowing reconfiguration of coordination regions based on updated long-term information. The system adapts to changing conditions by periodically updating the long-term information and reconfiguring regions accordingly, maintaining both interference mitigation and adaptability.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems implementing beamforming, a neighboring base station may cause interference to a user equipment (UE) served by a different base station. To mitigate unexpected interference, an interference coordination region including time and frequency resources may be configured between the base stations. The interference coordination region may be configured based on long-term information for the base stations and may include one or both of a set of beam-avoidance sub-regions or a set of beam-preference sub-regions for a base station, where each sub-region is associated with a beam index. A base station may schedule a communication beam in the interference coordination region based on a beam-avoidance region (e.g., refraining from using a particular communication beam) or a beam-preference region (e.g., prioritizing a particular communication beam). The base station may transmit a message to a UE using the scheduled communication beam.