TRP Coefficient Signaling for Non-Zero Precoding Feedback
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Solution Overview
Problem
Existing mobile communication systems face challenges in efficiently indicating combination coefficients for precoding calculations due to limitations in reporting non-zero coefficients among TRP groups, affecting communication reliability.
Innovation Solution
A method and apparatus for indicating coefficients by configuring codebook parameters for multiple TRP groups, allowing terminals to determine and send first indication information to network devices, which includes bitmap or combination numbers to specify the position of non-zero coefficients, and optionally quantizing these coefficients for precise precoding calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal reports combination coefficients in a differential manner in polarization direction, then the reporting efficiency is improved, but the ability to accurately indicate non-zero coefficients among multiple TRP groups deteriorates
Solution Approach 1:
The patent segments the coefficient indication into two parts: first indication information indicating the position of non-zero coefficients, and second indication information indicating the specific coefficient values. This segmentation allows the system to efficiently report only relevant coefficients while maintaining accuracy in identifying non-zero positions among multiple TRP groups.
Solution Approach 2:
The patent introduces a new dimension for coefficient indication by using combination numbers to represent positions of non-zero coefficients. This dimensional approach allows the terminal to efficiently indicate which coefficients are non-zero without reporting all coefficients in differential manner, thus improving reporting efficiency while maintaining indication accuracy.
2Measurement precision
If the terminal reports all combination coefficients, then the precoding calculation accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The patent extracts only the essential information for precoding calculation by using first indication information to identify positions of non-zero coefficients and second indication information to provide their values. This extraction approach maintains precoding accuracy while significantly reducing signaling overhead compared to reporting all coefficients.
Solution Approach 2:
The patent applies partial action by reporting only the non-zero coefficients rather than all coefficients. The first indication information identifies which coefficients are non-zero, and only these selected coefficients are reported in detail, reducing signaling overhead while maintaining sufficient precision for precoding calculations.
Data Source
AI summary
A method for indicating a coefficient is performed by a terminal. The method includes: receiving configuration information sent by a network device, wherein the configuration information is configured to configure codebook parameters of a plurality of Transmission Reception Point (TRP) groups, and each TRP group comprises at least one TRP; determining first indication information according to the configuration information, wherein the first indication information is configured to indicate a position of a non-zero coefficient among combination coefficients, the combination coefficients are coefficients determined by the terminal according to the codebook parameters of the plurality of TRP groups, and the combination coefficients are used by the network device to perform precoding calculation; and sending the first indication information to the network device.