DM-IMR Configuration for Interference Measurement Accuracy
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Solution Overview
Problem
Current LTE systems face challenges in improving interference measurement accuracy, particularly under PDCCH/ePDCCH/PDSCH demodulation conditions, which limits network capacity due to high pilot overhead and interference between cells.
Innovation Solution
The system configures DM-IMRs (Demodulation Interference Measurement Resources) by the network side, determining their positions based on allocated PRBs and indicating configuration information to terminals for transmission interference measurement, utilizing ZP-CSI-RS, CSI-RS, and CRS resources to enhance channel estimation and interference measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional interference measurement methods are used in LTE systems, then network coverage is maintained, but interference measurement accuracy deteriorates under PDCCH/ePDCCH/PDSCH demodulation conditions
Solution Approach 1:
The patent segments the interference measurement process by introducing separate DM-IMR resources specifically for demodulation interference measurement, distinct from traditional CSI-IMR resources. This segmentation allows accurate interference measurement under demodulation conditions without complicating the overall system architecture.
Solution Approach 2:
The patent introduces DM-IMR resources as an intermediary mechanism that enables accurate interference measurement under PDCCH/ePDCCH/PDSCH demodulation conditions. These resources act as a mediator between the terminal and network, providing dedicated measurement opportunities that reflect actual demodulation interference without requiring complex terminal processing.
2Measurement precision
If more reference signals are used for channel estimation, then channel estimation accuracy is improved, but pilot overhead increases
Solution Approach 1:
The patent makes DM-IMR resources multi-functional by designing them to serve both as interference measurement resources and as channel estimation references. This universality allows the system to improve channel estimation accuracy under demodulation conditions without proportionally increasing pilot overhead, as the same resources fulfill multiple measurement functions.
3Productivity
If cell density is increased to improve spectrum efficiency, then network capacity is improved, but interference between cells increases
Solution Approach 1:
The patent implements a feedback mechanism where terminals measure interference on DM-IMR resources and report CSI information including interference measurements to the network. This feedback loop enables the network to adaptively adjust resource allocation and transmission parameters to mitigate inter-cell interference, allowing higher cell density to be sustained with improved spectrum efficiency.
Data Source
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AI summary
Disclosed are an interference measurement method and system, and related equipment. The method includes: a network side configures Interference Measurement Resources for Demodulation (DM-IMRs) for a target data channel of a terminal, positions of the DM-IMRs on a frequency domain being determined according to a Physical Resource Block (PRB) which bears the target data channel; and the network side indicates configuration information of the DM-IMRs to the terminal to enable the terminal to perform transmission interference measurement on the target data channel. By the solutions of the present disclosure, accuracy in transmission interference measurement of the target data channel may be improved, so that improvement in demodulation/decoding performance of the target data channel at a receiving side is facilitated, and receiving performance of the target data channel may further be improved.