CSI-RS Port Set Determination for Accurate 5G Measurement Feedback
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Solution Overview
Problem
In 5G NR systems, the number of CSI-RS ports for channel or interference measurement does not always match the number of CSI-RS ports defined by one CSI-RS resource, leading to unclear channel measurement procedures and inaccurate feedback to the base station.
Innovation Solution
A method to determine a target CSI-RS port set within resource configuration information for performing channel or interference measurement, allowing terminals to obtain accurate measurement values by collectively using all CSI-RS ports or specific CSI-RS resources as indicated by the network device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple CSI-RS resources are aggregated to support flexible port numbers, then the adaptability of the system increases, but the measurement precision deteriorates because the terminal cannot accurately determine which ports to use for channel measurement
Solution Approach 1:
The patent divides the CSI-RS resource configuration into two distinct parts: a resource set containing multiple CSI-RS resources with different port configurations, and a specific indication mechanism that points to the particular resource to be used. This segmentation allows the system to maintain multiple port options while clearly indicating which one should be used for measurement, thus preserving both flexibility and measurement accuracy.
Solution Approach 2:
The patent introduces an intermediary indication mechanism (such as an index or identifier) that acts as a mediator between the aggregated CSI-RS resources and the terminal's measurement process. This intermediary clearly specifies which CSI-RS resource ports should be used for channel measurement, resolving the ambiguity that would otherwise exist when multiple resources are aggregated.
2Ease of operation
If the terminal uses all CSI-RS ports in aggregated resources for measurement, then the measurement process becomes simpler, but the feedback accuracy deteriorates because the port configuration does not match the actual data layers allocated
Solution Approach 1:
The patent introduces an intermediary indication mechanism (such as an index or identifier) that acts as a mediator between the aggregated CSI-RS resources and the terminal's measurement process. This intermediary clearly specifies which CSI-RS resource ports should be used for channel measurement, resolving the ambiguity that would otherwise exist when multiple resources are aggregated.
Solution Approach 2:
The patent applies local quality by allowing different CSI-RS resources within the same resource set to have different port configurations tailored to specific measurement needs. Instead of requiring all ports to be uniformly configured, the system can selectively activate specific ports with appropriate configurations for the actual data layers being transmitted.
Data Source
AI summary
A measurement method, a measurement configuration method, a terminal, and a network device are provided, which relate to the field of communication technology. The measurement method is applied to a terminal, and includes: obtaining resource configuration information for performing target measurement; determining a target CSI-RS port set, in the resource configuration information, for performing target measurement; and obtaining a target measurement value corresponding to the target CSI-RS port set through performing measurement; wherein the resource configuration information includes at least one resource set, each resource set includes at least one CSI-RS resource, and the target measurement includes channel measurement or interference measurement.