CSI-RS Resource Subset Indication for Flexible Interference Measurement
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Solution Overview
Problem
In radio communication systems, user equipment (UE) faces difficulties in measuring interference flexibly, especially when served by multiple cells using different transmission schemes, as existing methods struggle to accurately assess interference in varying scenarios.
Innovation Solution
A base station transmits both first-type and second-type CSI-RS configuration signals to the UE, where the second resource set is a subset of the first, allowing the UE to perform interference measurements in specific resource positions, enabling flexible interference measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE measures interference in all resource positions, then the measurement coverage is comprehensive, but the measurement complexity and processing overhead increase
Solution Approach 1:
The patent segments the resource set into multiple resource positions and introduces a subset indication mechanism. The base station configures a full resource set for CSI-RS transmission and indicates a subset of resource positions that the UE should use for interference measurement. This segmentation allows the UE to focus measurements on specific resource positions rather than all positions, reducing measurement complexity while maintaining accurate interference assessment through targeted measurements.
2Loss of information
If the base station transmits CSI-RS in all resource positions, then the channel state information coverage is complete, but the signaling overhead increases
Solution Approach 1:
The patent extracts only the necessary resource positions from the full CSI-RS resource set. The base station transmits CSI-RS in all resource positions to maintain complete channel state information coverage, but uses signaling to indicate a subset of resource positions that are relevant for interference measurement. This allows the system to maintain complete CSI coverage while reducing the effective signaling overhead by extracting only the necessary measurement positions.
3Measurement precision
If the UE measures interference in multiple scenarios, then the CQI accuracy improves, but the measurement time and processing delay increase
Solution Approach 1:
The patent implements preliminary action by having the base station pre-configure the full resource set and pre-indicate the subset of resource positions for interference measurement. This allows the UE to have measurement guidance ready before actual interference measurement is needed. The UE can then quickly perform measurements on the indicated subset positions without needing to process all resource positions, reducing measurement time while maintaining accurate multi-scenario CQI assessment.
Data Source
AI summary
Embodiments of the present invention disclose an interference measurement indication method, an interference measurement method, a related device, and a communication system. The interference measurement indication method includes: transmitting, by a base station, at least one piece of first-type channel state information reference signal CSI-RS configuration signaling to a user equipment UE, where the at least one piece of first-type CSI-RS configuration signaling indicates a first resource set used for CSI-RS transmission; and transmitting, by the base station, at least one piece of second-type CSI-RS configuration signaling to the UE, where a second resource set used for CSI-RS transmission, which is indicated by the at least one piece of second-type CSI-RS configuration signaling, is a subset of the first resource set. Technical solutions provided by the embodiments of the present invention help improve the flexibility of interference measurement of the UE.