CSI-RS Resource Aggregation for Large-Scale Antenna Measurement
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Solution Overview
Problem
In wireless communication systems, especially in LTE-A, the existing CSI measurement methods using CSI-RS resources result in inaccurate CSI measurement results and PMI information errors when the number of ports in a transmitting array exceeds 8, due to separate measurement of each set of CSI-RS resources in FDD mode.
Innovation Solution
A method where a BS notifies a UE of an aggregation mode for multiple sets of CSI-RS resources, allowing the UE to aggregate these resources for joint CSI measurement across all ports, thereby enhancing measurement accuracy for large-scale antenna arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sets of CSI-RS resources are transmitted separately for large-scale antenna arrays, then the system can handle more ports, but the CSI measurement accuracy deteriorates
Solution Approach 1:
The patent combines multiple sets of CSI-RS resources into a single measurement source by aggregating them in the time domain. The UE is configured to aggregate multiple CSI-RS resources (first set, second set, third set, etc.) and treat them as one unified measurement source, enabling joint CSI measurement across all ports while maintaining accuracy. This merging approach allows the system to handle large-scale antenna arrays without sacrificing measurement precision.
2Ease of operation
If separate measurement mode is used for each set of CSI-RS resources, then the measurement process is simple, but the PMI information measurement error increases
Solution Approach 1:
The patent merges multiple CSI-RS resource sets into a single measurement source configuration. Instead of performing separate measurements for each set, the UE aggregates all sets (first set, second set, third set, etc.) and performs a unified CSI measurement. This approach maintains operational simplicity while eliminating PMI information measurement errors that occur with separate measurement modes.
3Adaptability or versatility
If multiple sets of CSI-RS resources are transmitted, then more ports can be measured, but the measurement time increases
Solution Approach 1:
The patent aggregates multiple CSI-RS resources in the time domain to form a single measurement source. By combining the first set, second set, third set, and other CSI-RS resources into one unified measurement source, the system can measure all ports simultaneously rather than sequentially, thereby increasing the number of measurable ports without proportionally increasing measurement time.
Data Source
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AI summary
The present invention discloses a method, a device, and a system for measuring channel state information, which relate to the communications field. The method includes: transmitting, by a base station BS, multiple sets of channel state indication reference signal CSI-RS resources; and notifying a user equipment UE of an aggregation mode of the CSI-RS resources, so that after the UE aggregates the multiple sets of CSI-RS resources according to the aggregation mode of the CSI-RS resources to form a measurement source, the UE performs CSI measurement according to a channel corresponding to CSI-RS ports on the measurement source. The system includes: a base station and a user equipment. The base station includes a transmitting module and a notifying module. The user equipment includes a receiving module, a determining module, an aggregating module, and a measuring module. According to the present invention, a BS notifies a UE of an aggregation mode of multiple sets of CSI-RS resources transmitted, which enables the UE to perform CSI measurement after aggregating the multiple sets of CSI-RS resources, so as to provide a capability of jointly measuring CSI of all ports for a large-scale antenna array on one node, thereby increasing CSI measurement accuracy.