NCJT CSI Reporting Framework for Wireless Devices
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing channel state information (CSI) for non-coherent joint transmission (NCJT) in multi-transmission and reception point (TRP) scenarios, leading to increased CSI reporting overhead.
Innovation Solution
A framework and signaling mechanism that allows wireless devices (WDs) to omit CSI reporting for NCJT measurement hypotheses, reducing unnecessary reporting overhead by configuring WDs to selectively report CSI based on channel measurements and TRP configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI reporting is performed for all TRPs in NCJT scenarios, then channel state information accuracy is improved, but reporting overhead increases
Solution Approach 1:
The patent extracts and reports only the most critical CSI information for NCJT measurement hypotheses. Instead of reporting complete CSI for all TRPs, the system identifies and reports only essential parameters (such as CRI, RI, CQI for specific hypotheses) that are necessary for maintaining accurate channel state information while significantly reducing the volume of reported data.
Solution Approach 2:
The patent applies partial action by selectively reporting CSI for only certain measurement hypotheses rather than all possible TRP combinations. The system determines which hypotheses are most relevant based on current channel conditions and reports CSI only for those, achieving sufficient accuracy with reduced overhead.
2Quantity of substance
If selective CSI reporting is configured, then reporting overhead is reduced, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring the set of measurement hypotheses and identifying which ones are most relevant before actual CSI reporting occurs. The system prepares and signals the necessary hypothesis identifiers and parameters in advance, which simplifies the subsequent reporting process and reduces the complexity of real-time decision-making.
3Productivity
If complete CSI reporting is maintained, then network performance is improved, but device burden increases
Solution Approach 1:
The patent extracts and reports only the essential CSI parameters needed for maintaining network performance in NCJT scenarios. By identifying and reporting only the most critical information (such as channel quality indicators and rank information for key hypotheses) rather than complete CSI datasets, the system maintains network efficiency while significantly reducing the computational and energy burden on wireless devices.
Data Source
AI summary
A method, system and apparatus for a framework and signaling for non-coherent joint transmission (NCJT) channel state information (CSI) selection are disclosed. According to one aspect, a method in a wireless device (WD) includes performing channel measurements on each of a plurality of channel measurement resources, CMR, associated with each of at least one transmission-and-reception point, TRP. The method also includes transmitting to the network node an indication of at least one of reporting single-TRP channel state information, CSI, and reporting joint-TRP CSI, the CSI reporting being based at least in part on channel measurements on the CMR associated with at least one TRP for which CSI is reported.