Multi-Panel PUSCH Codebook Signaling for Multi-Beam UL MIMO
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Solution Overview
Problem
Existing communication technologies in NR Release 15 support only single panel and single beam codebook transmission on Physical Uplink Shared Channel (PUSCH), which is inadequate for the directional transmissions required in NR Release 16's multiple panel and multiple beam UL MIMO, particularly in high-frequency bands like FR2.
Innovation Solution
A method and apparatus for multiple panel and multiple beam codebook based PUSCH transmission, utilizing two or more panels to simultaneously transmit two codewords with distinct SRS resources, panel-specific parameters, and codeword-to-layer mapping schemes, along with precoding matrices to optimize data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If codebook based pre-coding is used for multi-antenna transmissions, then spectral efficiency is improved, but the complexity of selecting and indicating codebook indices increases
Solution Approach 1:
The codebook index indication is segmented into two parts: a first codebook index indicating the first precoding matrix and a second codebook index indicating the second precoding matrix. This segmentation allows the system to handle multiple panels and beams separately, reducing the overall complexity by breaking down the single complex index selection into multiple simpler index selections.
Solution Approach 2:
The patent introduces a new dimension for codebook indication by using separate codebook indices for different panels and beams rather than a single unified index. This dimensional approach allows independent optimization and selection of precoding matrices for each panel-beam combination, simplifying the selection process while maintaining spectral efficiency.
2Adaptability or versatility
If multiple panels and beams are supported, then adaptability and versatility are improved, but the device complexity increases
Solution Approach 1:
The patent implements a universal codebook structure that can handle multiple panels and beams using the same indication mechanism. The codebook is designed to be multi-functional, supporting both single-panel and multi-panel scenarios, as well as single-beam and multi-beam configurations, through a unified approach that reduces the need for separate handling mechanisms.
Solution Approach 2:
The patent enables dynamic selection of precoding matrices for different panels and beams through separate codebook indices. This dynamic approach allows the system to adapt to varying channel conditions for each panel and beam independently, optimizing performance while managing complexity through structured flexibility.
Data Source
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AI summary
The present disclosure relates to method and apparatus for multiple panel and/or multiple beam codebook based PUSCH transmissions. The method includes receiving, at a User Equipment (UE), Downlink Control Information (DCI) including two or more sets of parameters; and performing codebook based Physical Uplink Shared Channel (PUSCH) transmission for transmitting the two or more codewords according to the two or more sets of parameters, respectively; wherein each of the two or more sets of parameters includes at least one of a Sounding Reference Signal Resource Indicator (SRI), a Transmitted Precoding Matrix Indicator (TPMI), a Modulation Coding Scheme (MCS), a New Data Indicator (NDI) and a Redundancy Version (RV).