Beam Precoding Reporting for Inter-Cell Interference Reduction
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Solution Overview
Problem
In mobile communication systems, cell splitting using active antennas leads to increased inter-cell interference, which reduces system throughput due to suboptimal beam design.
Innovation Solution
A beam precoding manner reporting method and scheduling method that allow user equipment (UE) to determine and report beam combination usage results, including beam selection, multiplexing, and cooperation, to the base station, enabling optimized resource allocation and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cell splitting is implemented by replacing a wide beam with multiple narrower beams, then system capacity and coverage are improved, but inter-cell interference intensity increases
Solution Approach 1:
The patent implements dynamic beam management where the network can flexibly switch between wide beam and narrow beam configurations based on traffic conditions. The beam width and direction are adjusted dynamically to balance system capacity improvement against inter-cell interference, allowing the system to adapt to changing service requirements without being locked into a fixed beam configuration.
Solution Approach 2:
The patent changes beam parameters (width, direction, gain) to resolve the contradiction. By adjusting beam width from wide to narrow and modifying beam directions, the system achieves better spatial separation between cells, reducing inter-cell interference while maintaining the capacity benefits of cell splitting. The beam parameters are optimized based on traffic distribution and interference conditions.
2Productivity
If multiple narrower beams are used for cell splitting, then system throughput increases through resource multiplexing, but interference between beams reduces throughput
Solution Approach 1:
The patent converts beam interference into a beneficial signal by implementing coordinated multi-point transmission. Instead of treating interference as purely harmful, the system coordinates multiple beams to work together, where what would be interference becomes constructive signal addition at the user equipment, thereby improving throughput while managing interference through coordination rather than simple suppression.
Solution Approach 2:
The patent introduces beam coordination mechanisms as an intermediary layer between multiple narrow beams. This coordination layer manages resource allocation, power control, and scheduling across beams to minimize harmful interference while maximizing the throughput benefits of resource multiplexing. The intermediary coordination enables the system to achieve higher throughput by intelligently managing beam interactions.
3Productivity
If beam direction is adjusted in real time to high-gain areas, then system throughput increases, but device complexity increases
Solution Approach 1:
The patent implements preliminary beam configuration where beam directions and patterns are pre-planned and pre-configured based on network topology and expected traffic patterns. Instead of continuously adjusting beams in real-time, the system prepares beam configurations in advance, reducing the complexity of real-time control while still achieving the throughput benefits of directional high-gain transmission. The preliminary action reduces computational and control overhead.
Data Source
AI summary
Embodiments of the present invention provide a beam precoding manner reporting method, a scheduling method, and a device. The reporting method includes: determining, by UE, a used beam precoding manner, where the beam precoding manner is used to indicate a first beam combination usage result, and the first beam combination usage result includes usage manners, which are determined by the UE when the UE uses beams in combination, of the beams, where a beam combination usage manner includes one or two or three of beam selection, beam multiplexing, and beam cooperation according to different total quantities of the beams; and sending, by the UE, the beam precoding manner to a base station, so that the base station schedules the UE based on the beam precoding manner. Technical solutions of the present invention can reduce inter-cell interference in an active antenna system during vertical cell splitting, and increase a system throughput.