Aperiodic CSI Reporting in Multi-Cell Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently reporting aperiodic channel status information in multi-cell based environments, which affects data transmission rates and interference management.
Innovation Solution
A method and apparatus for reporting channel status information in a base station cooperative wireless communication system, where user equipment receives resource configuration information for CSI-RS and interference measurement, calculates channel status using this information, and reports it to the serving base station, utilizing triggering signals and resource element information to manage antenna ports and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If aperiodic channel status information is reported in multi-cell environments using conventional methods, then device compatibility is maintained, but data transmission rates and interference management efficiency deteriorate
Solution Approach 1:
The patent segments the channel status information reporting by introducing separate triggering mechanisms for different cells. The serving base station can independently trigger CSI reporting for each cell in the CoMP measurement set through separate triggering signals, allowing granular control over reporting timing and content for each cell while maintaining overall system coordination
Solution Approach 2:
The patent extends the reporting mechanism from a single-cell dimension to a multi-cell dimension by introducing cell-specific triggering signals. Each triggering signal contains cell identity information and can independently control CSI reporting for specific cells, adding a cellular dimension to the triggering mechanism that enables efficient multi-cell interference management
2Measurement precision
If resource configuration information for multiple antenna ports is transmitted, then channel measurement accuracy improves, but signal transmission overhead increases
Solution Approach 1:
The patent makes the triggering signal universal by designing it to simultaneously carry multiple functions: cell identity identification, triggering state indication, and CSI report type specification. This multi-functional design consolidates what would otherwise require multiple separate signaling messages into a single compact triggering signal, reducing overhead while maintaining comprehensive control
Solution Approach 2:
The patent changes the parameter structure of the triggering signal by encoding multiple pieces of information (cell ID, triggering state, report type) into a compact signal format. This parameter consolidation reduces the number of separate signaling transmissions required while preserving all necessary control information for accurate channel measurement and reporting
Data Source
AI summary
The present application discloses a method for enabling a terminal to report channel status information in a base station cooperative wireless communication system. Particularly, the method for enabling a terminal to report channel status information in a base station cooperative wireless communication system comprises the steps of: receiving, from a serving base station, first resource setting information for a channel status information-reference signal (CSI-RS) and second resource setting information for measuring interference: receiving a triggering signal for reporting the channel status information from the serving base station; calculating the channel status information on the serving base station and/or one or more cooperative base stations by using the first resource setting information and the second resource setting information; and reporting the channel status information to the serving base station, wherein the first resource setting information and the second resource setting information include information on an antenna port capable of referring to a large scale property of a wireless channel.