PDSCH Punctured Resources for INC Matrix Measurement
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently estimating and reporting interference plus noise covariance (INC) matrices, particularly due to the complexity of channel estimation and interference consideration in multiple-input multiple-output (MIMO) systems.
Innovation Solution
The method involves a user equipment (UE) receiving measurement and reporting configurations from a network node, which indicate punctured resources of a physical downlink shared channel (PDSCH) for estimating INC matrices. The UE then measures the PDSCH using these punctured resources and transmits reports of the INC matrices to the network node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE performs INC matrix estimation using all PDSCH resources, then the measurement precision is improved, but the device complexity increases due to the need to separate signal and interference components
Solution Approach 1:
The patent extracts interference measurement to separate punctured resources from regular PDSCH resources. By allocating specific punctured resources solely for interference measurement, the UE can directly measure interference without the complexity of separating signal and interference components, thus reducing device complexity while maintaining measurement precision.
Solution Approach 2:
The patent segments PDSCH resources into regular resources and punctured resources dedicated for interference measurement. This segmentation allows the UE to perform different measurement tasks on different resource types, simplifying the INC matrix estimation process by providing dedicated interference measurement resources.
2Manufacturing precision
If the UE reports detailed INC matrix information, then the network node can determine more accurate precoders, but the loss of time increases due to larger reporting overhead
Solution Approach 1:
The patent uses reference signals (such as CSI-RS) as copies or representations of the actual channel and interference conditions. Instead of reporting complete INC matrix information, the UE reports measurements based on these reference signals, which capture the essential interference characteristics without requiring full matrix reporting, thus reducing reporting time while maintaining precoder accuracy.
3Measurement precision
If the network node allocates dedicated punctured resources for interference measurement, then the measurement precision is improved, but the loss of substance increases due to reduced resources for data transmission
Solution Approach 1:
The patent applies partial action by allocating only specific punctured resources for interference measurement rather than dedicating all resources. This partial allocation provides sufficient measurement accuracy while minimizing the impact on data transmission resources, achieving a balance between measurement precision and resource efficiency.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, a measurement configuration indicating one or more punctured resources of a physical downlink shared channel (PDSCH) that can be used for measurements associated with estimating an interference plus noise covariance (INC) matrix at the UE. The UE may receive, from the network node, a reporting configuration indicating one or more INC matrices at the UE to be reported. The UE may transmit, to the network node, a report indicating the one or more INC matrices at the UE based at least in part on receiving the reporting configuration. Numerous other aspects are provided.