Correlation Value Calculation for Multi-Node CSI Feedback
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Solution Overview
Problem
In multi-node wireless communication systems, efficiently transmitting and receiving channel state information (CSI) between user equipment (UE) and multiple nodes is crucial for coordinated transmission, but existing methods lack efficiency in reporting correlation values between nodes, limiting data throughput and signal quality.
Innovation Solution
A method where the UE calculates and transmits correlation values between multiple nodes to the base station (BS), allowing the BS to receive and utilize this information for optimized precoding and resource allocation, enhancing CSI feedback and coordinated communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE transmits detailed channel state information for each node individually, then the base station can accurately recognize channel states, but the feedback overhead and signaling complexity increase significantly
Solution Approach 1:
The patent combines channel state information from multiple nodes into a single correlation value that captures the relationship between nodes. Instead of reporting separate CSI for each node, the UE calculates and reports a correlation value that represents the combined channel state, reducing feedback overhead while maintaining essential information for coordinated transmission.
Solution Approach 2:
The patent transforms detailed channel state information into a correlation value parameter. This parameter change converts multiple individual CSI measurements into a single correlation metric that captures the essential relationship between nodes, reducing the dimensionality and overhead of feedback while preserving the information needed for coordinated transmission decisions.
2Reliability
If the multi-node system uses dispersed nodes for transmission, then the transmission coverage and signal quality improve, but the coordination complexity and resource management difficulty increase
Solution Approach 1:
The patent extracts the essential coordination information from complex multi-node channel states by calculating correlation values. This extraction process identifies and reports only the critical relationship metric between nodes, simplifying the coordination task while maintaining the benefits of dispersed node transmission for coverage and signal quality.
3Loss of information
If correlation information between nodes is not reported, then the feedback overhead is reduced, but the base station cannot perform optimized precoding and resource allocation
Solution Approach 1:
The patent performs preliminary calculation of correlation values at the UE side before transmission. By pre-calculating the correlation metric that the base station needs for precoding and resource allocation, the system enables optimized transmission decisions without requiring detailed individual CSI feedback, thus maintaining throughput while reducing overhead.
Data Source
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AI summary
As channel state information of multiple nodes in a multiple node system, the present invention relates to a method and a device for transmitting and receiving information showing a correlation between said multiple nodes. Also, the present invention relates to a method and a device for transmitting and receiving a Channel Quality Indication (CQI), in consideration of signal through transmitted by multiple nodes.