Single Precoding Indicator for MIMO Signaling
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Solution Overview
Problem
Current mobile communication systems require a high number of resources to signal precoding indicators for multiple MIMO transmission modes, particularly in SU-MIMO and MU-MIMO, which increases computational load and energy consumption.
Innovation Solution
A method where a secondary station signals a single precoding indicator representative of recommended precoding coefficients for multiple MIMO modes, optimizing joint data rates based on weighted averages of rates for different transmission ranks, reducing the need for individual precoding indicators for each mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate precoding indicators are signaled for each MIMO mode (SU-MIMO and MU-MIMO), then the precision of precoding recommendation is improved, but the signaling resource consumption and device complexity increase
Solution Approach 1:
The patent combines separate precoding indicators for SU-MIMO and MU-MIMO modes into a single unified precoding indicator. The secondary station determines one precoding indicator that represents recommended precoding coefficients for both transmission modes, eliminating the need for separate indicators and reducing signaling overhead while maintaining precoding recommendation accuracy.
Solution Approach 2:
The single precoding indicator is designed to serve multiple functions simultaneously - it provides precoding recommendations for both SU-MIMO and MU-MIMO transmission modes. This universal indicator structure allows the system to maintain mode-specific optimization capabilities while using a unified signaling mechanism.
2Productivity
If separate precoding indicators are signaled for each MIMO mode, then the transmission rate optimization for each mode is improved, but the energy consumption increases
Solution Approach 1:
By merging the determination of precoding indicators into a single operation that serves both SU-MIMO and MU-MIMO modes, the patent reduces the computational energy consumption at the secondary station. The unified indicator determination process eliminates redundant calculations while maintaining the ability to optimize transmission rates for different MIMO modes.
3Quantity of substance
If a single precoding indicator is used for multiple MIMO modes, then the signaling resource consumption is reduced, but the adaptability to different transmission modes may be compromised
Solution Approach 1:
The patent designs the single precoding indicator with multi-functional capabilities, enabling it to adapt to different MIMO transmission modes (SU-MIMO and MU-MIMO) while consuming fewer signaling resources. The indicator structure incorporates information that allows the primary station to derive appropriate precoding coefficients for various transmission modes.
Data Source
Figure 1~3
AI summary
The invention relates to a method for operating a secondary station, the secondary station communicating with at least one primary station by means of MIMO transmissions, the method comprising the secondary station signaling a single precoding indicator representative of a set of recommended precoding coefficients to the primary station, wherein the same set precoding indicator applies for a plurality of available transmission modes.