CSI Reporting With Interference Cancellation in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently reporting channel state information (CSI) with interference cancellation capability, particularly in multi-node systems where interference management is complex due to the coordination of multiple base stations and antennas, leading to suboptimal signal quality and throughput.
Innovation Solution
A method and apparatus for reporting CSI with interference cancellation capability, involving the selection of CSI resource sets and interference hypothesis information to reflect interference cancellation capabilities, allowing terminals to detect dominant interference signals and calculate CSI, which is then reported to the serving cell, incorporating CSI-reference signal configuration, cell-specific RS, and CSI-interference measurement resource information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-node coordinated communication is implemented to improve data throughput and signal quality, then system performance and SINR are improved, but interference management complexity and device complexity increase
Solution Approach 1:
The patent segments interference management by introducing multiple CSI resource sets, each associated with specific interference cells. The terminal device selectively measures and reports CSI for different interference scenarios separately, rather than managing all interference sources simultaneously as a single complex process. This segmentation reduces the complexity of interference management while maintaining improved signal quality through targeted interference cancellation.
2Measurement precision
If multiple CSI resource sets are configured to reflect different interference scenarios, then interference cancellation capability is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent implements dynamic selection of CSI resource sets based on actual interference conditions. The terminal device detects dominant interference signals and adaptively chooses which CSI resource set to measure and report, rather than continuously reporting all possible interference scenarios. This dynamic approach maintains high measurement precision for relevant interference while reducing signaling overhead by avoiding redundant reports of insignificant interference.
3Adaptability or versatility
If interference hypothesis information is incorporated into CSI reporting to enhance interference cancellation, then interference management capability is improved, but processing complexity and computation requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple CSI resource sets with different interference hypotheses before actual data transmission. Each resource set contains pre-defined interference cancellation parameters and measurement configurations. When interference is detected, the terminal simply selects and applies the appropriate pre-configured resource set, avoiding complex real-time interference analysis and reducing processing complexity while maintaining high adaptability.
Data Source
AI summary
A method for reporting channel state information (CSI) having interference cancellation capability reflected therein, and an apparatus therefor are disclosed. A method for reporting channel state information (CSI) to which interference cancellation capability is reflected in a wireless communication system is performed by a terminal and includes receiving one or more CSI process configurations including one or more CSI resource sets from a serving cell, wherein the CSI resource set is associated with a specific interference cell, detecting a dominant interference signal from a received signal and selecting a CSI resource set corresponding to the dominant interference signal, calculating CSI to which interference cancellation capability is reflected, using the selected CSI resource set or interference hypothesis (IH) information corresponding to the selected CSI resource set, and reporting the calculated CSI to the serving cell through a CSI process corresponding to the selected CSI resource set or the IH information.