CSI Report Configuration via Unified TCI States
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently configuring channel state information (CSI) reports, particularly in multi-transmission and reception point (TRP) networks, where excessive control signaling and increased CSI feedback are required.
Innovation Solution
The method involves receiving a CSI reporting setting and non-zero power (NZP) CSI reference signal (RS) resources at a user equipment (UE), and then transmitting a CSI report based on these resources. This method also includes receiving downlink control information (DCI) for scheduling a physical downlink shared channel (PDSCH), which includes a transmission configuration indicator (TCI) field and quasi-co-location (QCL) information associated with each TCI state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple TRPs are used in wireless communication networks, then spectral efficiency and reliability are improved, but control signaling overhead and CSI feedback requirements increase excessively
Solution Approach 1:
The patent merges the configuration of multiple TRP CSI reports into a single unified configuration structure. The network device configures CSI reporting settings that encompass multiple TRPs simultaneously, allowing the UE to report CSI for multiple TRPs through consolidated signaling mechanisms rather than separate individual configurations for each TRP, thereby reducing control signaling overhead while maintaining support for multi-TRP operations
Solution Approach 2:
The TCI state configuration serves multiple functions: it provides quasi-co-location information for PDSCH demodulation, enables CSI reporting for multiple TRPs, and establishes the basis for downlink control information scheduling. This multi-functional approach eliminates the need for separate dedicated signaling mechanisms for each function, reducing overall control signaling complexity
2Productivity
If multiple TRPs are used in wireless communication networks, then spectral efficiency is improved, but CSI feedback overhead increases
Solution Approach 1:
The network device performs preliminary configuration of TCI states and QCL information before actual CSI reporting is needed. By pre-establishing the mapping between TCI states and CSI-RS resources, and configuring the UE with advance knowledge of which TRPs require CSI reporting, the system reduces the amount of feedback data needed during operation while maintaining high spectral efficiency through multi-TRP utilization
3Adaptability or versatility
If TCI states with multiple NZP CSI-RS resources are configured, then multi-TRP transmission support is improved, but control information processing complexity increases
Solution Approach 1:
The patent segments the control information processing into distinct manageable components: TCI state identification, QCL information extraction, and CSI-RS resource mapping. By dividing the complex task of processing multi-TRP control information into these separate modular operations, the UE can systematically handle each component without being overwhelmed by the overall complexity, thus supporting multi-TRP transmission while maintaining manageable processing requirements
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for configuring a channel state information (“CSI”) report. One method includes receiving, at a user equipment (“UE”), a CSI reporting setting. The method includes receiving a plurality of non-zero power (“NZP”) CSI reference signal (RS) (“CSI-RS”) resources for channel measurement (“CMR”). The method includes transmitting a CSI report based on the received NZP CSI-RS resources. The method includes receiving downlink control information (“DCI”) for scheduling a physical downlink shared channel (“PDSCH”). The DCI includes a transmission configuration indicator (“TCI”) field, a TCI state codepoint corresponding to the TCI field comprises a plurality of TCI states, and quasi-co-location (“QCL”) information associated with each TCI state corresponds to a demodulation reference signal (“DMRS”) for PDSCH and a distinct set of NZP CSI-RS resources.