Channel Measurement Resource Mapping for Multi-TRP CJT CSI
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Solution Overview
Problem
Current wireless communication standards lack efficient mechanisms for channel state information (CSI) reporting in coherent joint transmission (CJT) scenarios involving multiple transmission and reception points (TRPs), leading to suboptimal performance in multi-TRP operations.
Innovation Solution
The proposed solution involves configuring channel measurement resources (CMRs) to associate each TRP with specific ports or resource sets, enabling CSI reporting for coherent joint transmission across multiple TRPs, using CSI-RS port splitting, resource set splitting, and multiple CSI-RS resource sets to support up to four TRPs, with configurations managed through predefined mappings, RRC signaling, or MAC control elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current wireless communication standards are used for CSI reporting, then existing protocol compatibility is maintained, but CSI reporting accuracy and coherence in multi-TRP CJT scenarios deteriorates
Solution Approach 1:
The patent segments the channel measurement resource configuration by introducing TRP-specific parameters. Each TRP is associated with specific CSI-RS resource sets and ports through separate configuration parameters (e.g., cmr-ToAddList, trp-Index), enabling independent measurement and reporting for each TRP while maintaining overall system compatibility
Solution Approach 2:
The patent adds a new dimension to the existing CSI reporting framework by introducing TRP indexing and multi-dimensional resource set associations. The configuration includes trp-Index parameters and multiple CSI-RS resource sets that operate in an extended configuration space, allowing the system to support multi-TRP scenarios without breaking existing single-TRP functionality
2Stability of the object's composition
If channel measurement resources are configured to support multiple TRPs with specific port mappings, then CSI reporting coherence improves, but configuration complexity increases
Solution Approach 1:
The patent creates a universal configuration framework that handles both single-TRP and multi-TRP scenarios through the same parameter structure. The cmr-ToAddList, CSI-RS resource sets, and port mapping mechanisms serve multiple functions: they work for single TRP configurations and seamlessly extend to multi-TRP configurations, reducing the need for separate configuration paradigms
Solution Approach 2:
The patent introduces intermediary configuration parameters that mediate between the physical TRP structures and the CSI reporting mechanisms. Parameters like trp-Index, cmr-ToAddList, and resource set associations act as intermediaries that translate physical multi-TRP configurations into structured CSI measurement and reporting frameworks, simplifying the mapping process
3Productivity
If existing CSI reporting mechanisms are used without multi-TRP optimization, then implementation simplicity is maintained, but system throughput in multi-TRP scenarios deteriorates
Solution Approach 1:
The patent applies local quality by configuring different CSI-RS resource sets and port mappings for different TRPs based on their specific characteristics. Each TRP can have optimized resource allocations, antenna port configurations, and measurement parameters tailored to its local deployment conditions, enabling throughput optimization for each TRP while maintaining overall system coordination
Data Source
AI summary
Apparatus and methods are provided for TRP mapping configuration when a user equipment (UE) communicates with a plurality of transmission and reception points (TRPs). For multiple TRP (multi-TRP) coherent joint transmission (CJT) channel state information (CSI) reporting, a channel measurement resource (CMR) configuration may use CSI-RS port splitting, CSI-RS resource set splitting, or multiple CSI-RS resource sets.