Multi-TRP CSI Configuration for Coherent Joint Transmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in configuring channel state information (CSI) resources for coherent joint transmissions (CJTs) involving multiple transmission-reception points (TRPs), as current configurations do not support efficient CSI reporting across multiple TRPs.
Innovation Solution
A UE reports its capability to support multiple CSI-RS resources for CJT CSI reporting, and a network entity configures a CMR based on this capability, enabling the UE to measure and report CSI across multiple TRPs, facilitating coherent joint transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current CSI configurations are used for multiple TRPs, then device complexity is reduced, but CSI reporting efficiency and accuracy deteriorate
Solution Approach 1:
The CMR configuration is segmented into multiple CSI-RS resources, where each resource corresponds to a specific TRP. This allows the UE to measure and report CSI for each TRP separately, improving CSI reporting efficiency for multi-TRP scenarios while maintaining manageable configuration complexity through structured resource division
Solution Approach 2:
The patent introduces a new dimension to CSI configuration by enabling CMR to include multiple CSI-RS resources from different TRPs simultaneously. This dimensional expansion allows the system to handle multi-TRP scenarios effectively, transforming the single-TRP limitation into a multi-TRP capability without fundamentally redesigning the entire CSI framework
2Measurement precision
If multiple CSI-RS resources are configured for CJT, then measurement precision improves, but device complexity increases
Solution Approach 1:
The network configures multiple CSI-RS resources in advance, each associated with specific TRPs, before the UE performs measurements. This preliminary configuration allows the UE to efficiently process measurements by knowing in advance which resources to measure and how they map to different TRPs, improving measurement precision while managing processing complexity through pre-established resource mappings
Solution Approach 2:
The CMR configuration acts as an intermediary that bridges the network's multi-TRP transmission strategy and the UE's measurement capabilities. By defining clear associations between CSI-RS resources and TRPs in the CMR configuration, the system enables precise measurements across multiple TRPs without overwhelming the UE with unstructured complexity
Data Source
AI summary
Methods, systems, and devices for wireless communication are described to support configuring channel measurement resources (CMRs) for channel state information (CSI) reporting for coherent joint transmissions (CJTs) via multiple transmission-reception points (TRPs). A user equipment (UE) may transmit, to a network entity, an indication of a capability of the UE to support a CMR that includes two or more CSI-RS resources for CJT CSI reporting for multiple TRPs. Based on the indicated capability of the UE, the network entity may transmit control signaling indicating a CMR configuration, where the control signaling identifies a set of CSI-RS resources for CJT CSI reporting for the multiple TRPs. Based on the CMR configuration, the UE may transmit, to a network entity a CJT CSI report for the multiple TRPs, where the CJT CSI report may be determined based on the CMR configuration.