Shared Channel DMRS Separation for Accurate Interference Measurement
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Solution Overview
Problem
In current communication scenarios, the interference signal to a data signal differs significantly from the interference signal to a demodulation reference signal (DMRS), leading to inaccurate interference measurement results and affecting communication quality.
Innovation Solution
A method and apparatus that utilize separate resources for data transmission and DMRS, with the DMRS being transmitted on a different resource than the data, allowing for accurate interference measurement by separating intra-cell and inter-cell interference measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If data and DMRS are transmitted on the same resource, then resource utilization is efficient, but interference measurement accuracy deteriorates due to intra-cell interference affecting inter-cell interference measurement
Solution Approach 1:
The patent segments the time-frequency resource into separate regions: one region for data transmission and another region for DMRS transmission. This segmentation allows independent measurement of inter-cell interference on the DMRS resource without contamination from intra-cell data interference, thereby improving measurement accuracy while maintaining manageable resource allocation through clear separation.
Solution Approach 2:
The patent extracts the DMRS transmission from the data transmission resource and places it on a separate dedicated resource. This extraction removes the intra-cell interference component from the measurement process, allowing pure inter-cell interference measurement on the DMRS resource while the data resource remains dedicated to data transmission.
2Measurement precision
If separate resources are used for data and DMRS, then interference measurement accuracy improves, but resource utilization efficiency decreases
Solution Approach 1:
The patent designs the separated DMRS resource to serve multiple functions: it acts as both a demodulation reference signal carrier and an inter-cell interference measurement resource. This multi-functionality ensures accurate interference measurement while maintaining efficient resource utilization through the dual-purpose design of the separated resource region.
3Productivity
If data and DMRS share the same time-frequency resource, then transmission efficiency is high, but intra-cell interference contaminates inter-cell interference measurement
Solution Approach 1:
The patent transitions from a single-dimension shared resource approach to a two-dimensional separated resource approach, creating distinct time-frequency regions for data and DMRS. This dimensional separation in the time-frequency plane prevents interference contamination while maintaining overall transmission efficiency through optimized resource allocation across the expanded resource dimension.
Data Source
AI summary
A measurement method, an apparatus, and a system. In the measurement method, a part of resources on which no data is carried are reserved in a shared channel, and a DMRS is not carried on the part of resources. The part of resources may be dedicated to channel measurement, to avoid impact of a signal of another device on the channel measurement, and improve accuracy of the channel measurement.