Multi-TRP CSI Codepoint Reporting for Spatial Domain Base Allocation
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Solution Overview
Problem
Wireless communications systems face challenges in complex and dynamic environments that attenuate or block signals, necessitating improvements in signal transmission and reception efficiency, reliability, and coverage, particularly in scenarios involving multiple transmission reception points (TRPs).
Innovation Solution
A method for wireless communications where a user equipment (UE) selects a codepoint based on the quantity of TRPs and total spatial domain (SD) bases, transmitting channel state information (CSI) signaling to indicate the quantity of SD bases for each TRP, allowing the network entity to determine the appropriate SD bases for each TRP, thereby optimizing throughput and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE reports detailed channel state information for multiple TRPs, then the reliability of wireless communications is improved, but the CSI reporting overhead increases
Solution Approach 1:
The patent extracts only the essential information (codepoint indicating quantity of SD bases) from the full CSI report, separating the critical parameter needed for multiple TRP configuration from the complete channel state information. This allows the network to determine SD bases for multiple TRPs without requiring the UE to report all detailed CSI parameters, thereby reducing overhead while maintaining reliability.
Solution Approach 2:
Instead of the UE reporting all detailed CSI information directly, the patent inverts the approach by having the UE report a compressed codepoint that enables the network to derive the necessary SD base quantities. The network then uses this codepoint along with its own knowledge of total SD bases to determine the configuration, flipping the traditional reporting direction and reducing overhead.
2Productivity
If the network configures SD bases for multiple TRPs, then the throughput is improved, but the device complexity increases
Solution Approach 1:
The patent segments the SD base configuration into TRP-specific quantities that can be independently determined for each transmission reception point. By using codepoints that indicate the number of SD bases per TRP, the system can configure multiple TRPs with different base quantities, allowing throughput improvement through spatial diversity while managing device complexity through structured, segmented configuration.
Solution Approach 2:
The patent changes the parameter representation from full CSI reports to compressed codepoints indicating SD base quantities. This parameter transformation allows the network to efficiently configure multiple TRPs with appropriate SD base allocations, improving throughput through better resource utilization while reducing the complexity of CSI processing and reporting.
Data Source
AI summary
Certain aspects of the present disclosure provide a method of wireless communications by a user equipment (UE). The method includes receiving configuration information indicating resources for a set of transmission reception points (TRPs); selecting a codepoint from a set of codepoints based at least in part on a quantity of TRPs in the set of TRPs and a total quantity of SD bases for the set of TRPs, the codepoint indicating a quantity of spatial domain (SD) bases selected by the UE for each TRP of the set of TRPs; and transmitting channel state information (CSI) signaling that includes an indication of the codepoint that indicates the quantity of SD bases for each TRP.