Multi-TRP Channel State Reporting With Indexed Beamforming Configuration
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing channel state information (CSI) reporting for multiple transmit receive points (TRPs), which affects beamforming accuracy and network performance.
Innovation Solution
A method and apparatus for configuring CSI reporting that involves mapping TRP index values to TRPs, allowing UEs and network entities to select and transmit TRP index values with CSI reports, enabling precise determination of precoding information and beamforming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI reporting is configured for multiple TRPs without a standardized data structure, then flexibility in reporting is maintained, but beamforming accuracy and network performance deteriorate due to inconsistent TRP identification
Solution Approach 1:
The patent segments the CSI reporting configuration by introducing a structured TRP data structure that divides TRP identification into discrete index values. Each TRP is assigned a specific index, allowing the UE to selectively report CSI for individual TRPs or combinations thereof. This segmentation enables precise beamforming per TRP while maintaining manageable configuration complexity through standardized indexing.
Solution Approach 2:
The patent changes the parameter representation by introducing TRP index values as a new parameter in the CSI reporting configuration. Instead of using complex TRP identification methods, the system uses simplified index parameters that map to specific TRPs. This parameter transformation improves measurement precision for beamforming while reducing configuration complexity through standardized index-based identification.
2Productivity
If detailed CSI reporting for multiple TRPs is implemented, then network performance improves, but uplink signaling overhead increases
Solution Approach 1:
The patent extracts only the essential TRP identification information by introducing compact index values that represent specific TRPs or TRP combinations. Instead of transmitting full TRP configuration details, the UE sends condensed index values that the network entity can map to the actual TRP configurations using the standardized TRP data structure. This extraction reduces uplink signaling overhead while maintaining the ability to support detailed multi-TRP CSI reporting for improved network throughput.
Solution Approach 2:
The patent introduces TRP index values as an intermediary between the UE and the actual TRP configurations. The index values serve as a compact representation that reduces signaling overhead while still enabling the network entity to retrieve detailed TRP information through the standardized data structure. This intermediary mechanism allows detailed CSI reporting for multiple TRPs to improve network throughput without proportionally increasing uplink signaling overhead.
3Adaptability or versatility
If TRP selection is made dynamically by UE, then adaptability to channel conditions improves, but processing complexity at UE increases
Solution Approach 1:
The patent enables dynamic TRP selection by the UE based on channel conditions while maintaining manageable processing complexity through standardized data structures. The UE can select different TRPs or TRP combinations dynamically and represent these selections using predefined index values from the TRP data structure. This dynamic selection capability improves adaptability to varying channel conditions while the standardized indexing keeps UE processing complexity manageable.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for reporting channel state information (CSI) for multiple transmit receive points (TRPs), the configuration specifying a TRP data structure that maps TRP index values to TRPs. The UE may select one or more TRPs from the multiple TRPs for a CSI report. The UE may select a TRP index value from the TRP data structure based at least in part on the one or more TRPs selected for the CSI report. The UE may transmit the TRP index value with the CSI report. Numerous other aspects are described.