Multi-Cell Reference Signal Resource Mapping for CSI Reporting
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Solution Overview
Problem
In multi-cell based wireless communication systems, existing technologies face challenges in effectively setting and managing reference signals across multiple cells, leading to inefficiencies in signal transmission and reception.
Innovation Solution
A method and apparatus for a user equipment (UE) to receive and process information about multiple reference signal resources and channel status information (CSI) from a base station, allowing for the reporting of CSI that includes information about these resources, which can have similar large-scale properties, such as Doppler spread and delay spread, to enhance signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple reference signal resources are configured in multi-cell systems, then signal transmission reliability is improved, but device complexity and management overhead increase
Solution Approach 1:
The patent segments reference signal resources into multiple distinct resources (first reference signal resource and second reference signal resource) associated with different cells. Each reference signal resource can be independently configured and measured, allowing the UE to handle multiple cells without overwhelming complexity by processing them as separate, manageable units.
Solution Approach 2:
The patent creates a universal mapping relationship between reference signal resources and CSI processes that can be applied across multiple cells. The same CSI process can be associated with different reference signal resources from different cells, providing a multi-functional framework that handles both single-cell and multi-cell scenarios with a unified approach.
2Measurement precision
If CSI is reported based on multiple reference signal resources, then channel status information accuracy is improved, but information processing overhead increases
Solution Approach 1:
The patent merges multiple reference signal resources into a single CSI process for reporting. Instead of requiring separate CSI reports for each reference signal resource, the system combines them into one unified CSI process, reducing the quantity of information that needs to be processed and reported while maintaining accuracy through the inclusion of multiple resources.
Solution Approach 2:
The patent uses indicator information to reference and identify different reference signal resources within the CSI process. Rather than duplicating all resource details in each CSI report, the system uses compact indicators that point to the configured reference signal resources, reducing information overhead while preserving measurement precision.
3Productivity
If reference signals from multiple cells are combined, then communication efficiency is improved, but signal processing complexity increases
Solution Approach 1:
The patent performs preliminary configuration of reference signal resources and their mapping to CSI processes before actual signal transmission and measurement. By pre-establishing the relationships between reference signals, cells, and CSI processes, the system reduces real-time processing complexity while enabling efficient multi-cell communication through prepared, organized resource structures.
Data Source
AI summary
Disclosed is a method for transmitting and receiving a signal, by a terminal, in a wireless communication system. More particularly, the method comprises the steps of: receiving information about a plurality of reference signal resources from a base station; receiving information about one channel state information (CSI) process from the base station; and reporting CSI on the basis of the information about the one CSI process, wherein the information about the one CSI process comprises information indicative of at least one of the plurality of reference signal resources.