Multi-PUSCH Precoding for Shared-Antenna Multi-TRP Uplink
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Solution Overview
Problem
The challenge in determining appropriate precoding matrices for multi-TRP/panel transmission schemes in communication systems is unresolved, particularly when antenna ports are shared across multiple panels, leading to unsupported precoding configurations and impaired PUSCH transmission.
Innovation Solution
A communication method and apparatus that configures precoding matrices for multiple PUSCHs, ensuring they meet the requirements of multi-TRP/panel transmission by using a first precoding matrix set where non-zero elements in column vectors are limited to M/N, allowing for efficient mapping and transmission across multiple panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a multi-TRP/panel transmission scheme is adopted, then uplink spectrum efficiency is improved, but precoding configuration compatibility deteriorates
Solution Approach 1:
The patent changes the parameter constraints of precoding matrices by limiting non-zero elements in column vectors to M/N, where M is the number of antenna ports and N is the number of SRS resource sets. This parameter modification ensures that precoding configurations are compatible with multi-TRP/panel transmission schemes while maintaining uplink spectrum efficiency improvements
2Device complexity
If antenna ports are shared across multiple panels, then device complexity is reduced, but precoding matrix determination becomes uncertain
Solution Approach 1:
The patent segments the antenna ports into N groups corresponding to N SRS resource sets, where each group is associated with a specific TRP/panel. This segmentation approach allows shared antenna ports to be systematically allocated to different TRPs while providing clear rules for determining appropriate precoding matrices for each TRP, thereby reducing uncertainty in precoding matrix determination
3Productivity
If precoding matrices are optimized for multi-TRP/panel transmission, then resource usage efficiency is improved, but support for traditional single-TRP configurations deteriorates
Solution Approach 1:
The patent designs precoding matrices with a universal structure where non-zero elements are constrained to M/N per column. This universal structure allows the same precoding matrix format to be applied across both traditional single-TRP configurations and multi-TRP/panel transmission schemes, enabling optimized resource usage for multi-TRP while maintaining compatibility with single-TRP operations through the same precoding framework
Data Source
AI summary
A communication method includes the following. A terminal device sends a first physical uplink shared channel (PUSCH) and a second PUSCH. The terminal device corresponds to N sounding reference signal (SRS) resource sets, the first PUSCH is associated with a first SRS resource set among the N SRS resource sets, the second PUSCH is associated with a second SRS resource set among the N SRS resource sets, and the first SRS resource set is different from the second SRS resource set. The terminal device includes M antenna ports. A first precoding matrix for the first PUSCH and a second precoding matrix for the second PUSCH belong to a first precoding matrix set, a non-zero element in a column vector of each precoding matrix in the first precoding matrix set is less than or equal to M/N, and M and N are integers greater than or equal to 2.