Beam Clustering for Inter-Beam Interference Reduction in MIMO Systems
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Solution Overview
Problem
Communication systems face challenges in efficiently sharing and allocating limited resources among multiple users, leading to inter-beam interference issues that affect spectral efficiency and user equipment performance.
Innovation Solution
An apparatus and method that receive user equipment downlink power measurements from base stations, determine inter-beam interference, and assign beams to clusters using spectral or hierarchical clustering, ensuring that beams within a cluster share time and/or frequency resources, thereby minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources are shared among multiple users in communication systems, then resource utilization efficiency is improved, but inter-beam interference increases
Solution Approach 1:
The patent segments beams into different clusters based on interference characteristics. Beams with similar interference patterns are grouped together, allowing the system to manage interference at the cluster level while maintaining high resource utilization through shared time and frequency resources within each cluster.
Solution Approach 2:
The patent changes the parameter of beam grouping by introducing cluster-based organization. By adjusting how beams are grouped (changing the grouping parameters), the system can optimize the balance between resource sharing and interference management dynamically.
2Productivity
If beams share time and frequency resources to improve spectral efficiency, then resource allocation efficiency is improved, but inter-beam interference control becomes more difficult
Solution Approach 1:
The patent divides the beam set into multiple clusters where beams within each cluster share resources. This segmentation allows interference control to be applied at the cluster level rather than individually to each beam, reducing the overall control complexity while maintaining spectral efficiency.
Solution Approach 2:
The patent introduces cluster identification as a new parameter that simplifies interference control. By assigning beams to clusters with similar characteristics, the system reduces the dimensionality of the control problem from individual beam management to cluster-level management.
3Object-generated harmful factors
If clustering is applied to reduce inter-beam interference, then interference levels are reduced, but computational complexity for cluster assignment increases
Solution Approach 1:
The patent uses interference characteristics as key parameters for clustering. By selecting appropriate parameters (such as spatial direction, frequency usage patterns), the patent reduces the complexity of cluster assignment while effectively reducing inter-beam interference through meaningful groupings.
Data Source
AI summary
Apparatuses, methods and computer programs are described including, receiving user equipment downlink power measurements from one or more base stations of a communication system, wherein the one or more base stations are configured to provide a plurality of user equipment downlink power measurements for user equipment in communication with a respective base station of the one or more base stations; determining inter-beam interference for multiple directive beams of the or each base station based on the user equipment download power measurements; and assigning one or more beams to one or more clusters such that, for all beams within a cluster, inter-beam interference is below a threshold, wherein beams within a cluster share time and/or frequency resources.