CSI-RS Measurement Accuracy via Multi-Resource Combining
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Solution Overview
Problem
The existing LTE system faces poor measurement accuracy of CSI-RS RSRP due to limited Resource Block (RB) resources, which cannot be adequately addressed by increasing measurement bandwidth or period without increasing implementation complexity and power consumption.
Innovation Solution
A method for a User Equipment (UE) to measure CSI-RS RSRP and RSRQ by combining multiple CSI-RS resources, selecting resources with stronger CSI correlation, and configuring them based on time-frequency domain characteristics, allowing for increased sample density and improved measurement accuracy without requiring extensive system modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement bandwidth is increased to improve measurement accuracy, then measurement accuracy of CSI-RS RSRP is improved, but system bandwidth limitation prevents this solution and increases UE complexity
Solution Approach 1:
The patent combines multiple CSI-RS resources from different antenna ports and/or different subframes to perform a single measurement. By merging the signal samples from multiple resources, the effective sample size increases, improving measurement accuracy without requiring increased system bandwidth or UE processing complexity.
2Measurement precision
If measurement period is increased to improve measurement accuracy, then measurement accuracy of CSI-RS RSRP is improved, but UE power consumption and implementation complexity increase
Solution Approach 1:
The patent combines multiple CSI-RS resources within the existing measurement period to achieve better accuracy. By utilizing multiple resources simultaneously or within shorter intervals rather than extending the measurement period, the UE completes measurements faster, reducing power consumption while maintaining or improving accuracy through increased sample density.
3Measurement precision
If number of antenna ports is increased to improve measurement accuracy, then sample number increases and measurement accuracy improves, but system resources are consumed
Solution Approach 1:
The patent enables a single CSI-RS resource configuration to serve multiple measurement purposes by allowing measurements across multiple antenna ports and subframes. The same physical resources are utilized more efficiently to provide comprehensive channel state information for multiple spatial layers without requiring additional dedicated resources for each antenna port measurement.
Data Source
AI summary
An example of the present disclosure provides a method and User Equipment (UE) apparatus for measuring a Channel State Indication (CSI)-Reference Signal (RS), by utilizing multiple CSI-RS resources, which includes: receiving, by a User Equipment (UE), a signaling, in which the signaling indicates a multiple CSI-RS resource combination, which corresponds to a CSI-RS Reference Signal Receiving Power (RSRP), and/or, a CSI-RS Reference Signal Receiving Quality (RSRQ), and corresponding configuration information; obtaining, by the UE, a resource location corresponding to the obtained multiple CSI-RS resource combination, and the corresponding configuration information from the signaling; measuring, by the UE, the CSI-RS at the corresponding resource location, and reporting a measurement result.