Multi-Cell Interference Mitigation via Unified Channel Measurement
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Solution Overview
Problem
In a communication environment with multiple cells, conventional MIMO systems do not consider cells to which a UE is not connected, leading to interference and degradation in communication quality, rate, and capacity.
Innovation Solution
A communication system where each cell performs radio communication with a UE through multiple antenna elements and notifies other cells of channel information measurement settings, allowing cells to recognize and mitigate interference from other cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional MIMO systems operate in multi-cell environments without considering other cells, then device complexity is reduced, but interference from other cells degrades communication quality, rate, and capacity
Solution Approach 1:
The patent merges channel information measurement settings from multiple cells into a unified configuration that the UE can process. The serving cell and non-serving cells coordinate their CSI-RS resources and measurement settings, allowing the UE to measure and report channel information that accounts for interference from multiple cells simultaneously, thereby improving communication quality without requiring separate processing for each cell
Solution Approach 2:
The patent introduces channel information measurement settings as an intermediary mechanism that enables coordination between serving and non-serving cells. These settings act as a mediator that allows the UE to measure channel conditions from multiple cells and provide feedback that helps the serving cell adjust transmissions to mitigate interference from other cells, thereby improving reliability without significantly increasing device complexity
2Reliability
If cells notify other cells of channel information measurement settings, then interference mitigation is improved, but information exchange overhead increases
Solution Approach 1:
The patent makes the channel information measurement settings universal by using a standardized configuration format that can be applied across multiple cells. The same measurement settings structure serves both the serving cell and non-serving cells, allowing efficient information exchange without requiring cell-specific customization. This multi-functionality reduces signaling overhead while maintaining the ability to mitigate interference and improve communication capacity
3Reliability
If multiple cells coordinate channel information measurement, then interference from non-serving cells is reduced, but measurement and processing complexity increases
Solution Approach 1:
The patent segments the channel information measurement process into distinct components: the serving cell configures measurement settings, non-serving cells provide their CSI-RS resources, and the UE processes these segmented inputs separately before combining results. This segmentation allows each cell to independently manage its own measurement contributions while the UE aggregates the information, reducing the complexity burden on individual cells while still achieving interference mitigation and improved communication rate
Data Source
AI summary
A communication system configured to support a plurality of frame formats used for wireless communication, includes a base station, and a user apparatus configured to wirelessly communicate with the base station. Numerologies that specify subcarrier spacings are configured respectively to the plurality of the frame formats, In the plurality of the frame formats, synchronization signals and broadcast channels are mapped to resources respectively corresponding to the plurality of the frame formats.