User Equipment Selection for Inter-Cell Interference Reduction
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Solution Overview
Problem
In mobile communication systems, user equipment selection is challenging due to increasing interference at cell edges, leading to decreased data rates and overall system throughput.
Innovation Solution
A method and apparatus for selecting user equipment (UE) in a mobile communication system that chooses the n−1th UE in multiple cells and selects a UE with the maximum weighted sum rate (WSR) from remaining cells, excluding those containing the 1st to n−1th UEs, to reduce inter-cell interference and enhance signal strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If beamforming technique is used to adjust interference, then inter-cell interference is reduced, but additional gains in system throughput are limited
Solution Approach 1:
The user equipment selection process is segmented into multiple stages: first selecting the (n-1)th UE in multiple cells, then selecting the nth UE with maximum weighted sum rate from remaining cells. This segmentation allows the system to optimize interference reduction and throughput gains in a structured manner, achieving both inter-cell interference reduction and additional throughput gains beyond what beamforming alone can provide
2Device complexity
If user equipment is selected without considering multiple cells, then selection process is simple, but system throughput is limited
Solution Approach 1:
The user equipment selection is extended from a single-cell perspective to a multi-cell perspective. By considering UEs across multiple cells and using the weighted sum rate metric that accounts for interference in neighboring cells, the system achieves higher throughput while maintaining a systematic and manageable selection process through the structured (n-1)th and nth UE selection methodology
Data Source
AI summary
Provided are a method and apparatus for user equipment (UE) selection in a mobile communication system. The method may include: selecting the n−1th UE in multiple cells (n: constant ≧2); and selecting a UE with the maximum weighted sum rate (WSR) as the nth UE from among UEs belonging to the remaining cells excluding those cells containing the 1st to n−1th UEs. Hence, the scheduling function enabling suitable user equipment selection may further increase overall system throughput by providing additional gains in addition to beamforming, i.e. further reducing inter-cell interference and increasing signal strength toward a desired user equipment.