Terminal Device Codeword Selection for Uplink Power Utilization
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Solution Overview
Problem
In wireless communications, terminal devices with non-coherent and partially-coherent capabilities face limitations in achieving rated maximum transmit power for Physical Uplink Shared Channel (PUSCH) transmission, resulting in poor sending quality due to restricted power utilization.
Innovation Solution
A method and apparatus that determine and utilize specific codeword sets, including fully-coherent, partially-coherent, and non-coherent codewords, to enable terminal devices to reach rated maximum transmit power by indicating coherent capabilities and selecting appropriate codebook subsets for improved power utilization and transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If terminal devices with non-coherent or partially-coherent capabilities use traditional power control mechanisms, then they can support their respective coherent capabilities, but they cannot achieve rated maximum transmit power for PUSCH transmission
Solution Approach 1:
The patent changes the codebook selection parameter from traditional non-coherent or partially-coherent codebooks to fully-coherent codebooks. By modifying the codebook type parameter while keeping the same hardware configuration, the terminal device can achieve rated maximum transmit power without changing its physical coherent capability, thus resolving the contradiction between power output and transmission quality
Solution Approach 2:
Instead of limiting transmit power according to coherent capability levels, the patent inverts the approach by allowing all terminal devices to use fully-coherent codebooks for codebook-based precoding. This inversion enables non-coherent and partially-coherent devices to achieve maximum transmit power by using fully-coherent codebook structures, thereby improving PUSCH sending quality while maintaining their original coherent capability classifications
2Productivity
If terminal devices use partially-coherent or non-coherent codewords, then they can support their coherent capabilities, but transmit power utilization is restricted to 1/2 or 1/4 of rated maximum power
Solution Approach 1:
The patent makes fully-coherent codebooks universally applicable to all terminal devices regardless of their coherent capability level. By enabling non-coherent and partially-coherent devices to use fully-coherent codebook structures, the system achieves universal power utilization where all devices can reach rated maximum transmit power, eliminating the need for different power scaling factors (1/2 or 1/4) based on coherent capability
Solution Approach 2:
The patent changes the codebook type parameter from capability-specific codebooks to unified fully-coherent codebooks. This parameter change allows terminal devices to transition from restricted power utilization (1/2 or 1/4 of rated power) to full power utilization (rated maximum power), thereby improving both productivity and reliability simultaneously
Data Source
AI summary
This application relates to a communications method and apparatus, and a device. The communications method includes: A terminal device determines a first codeword set, where the first codeword set includes a first codeword, the first codeword is a 4×1 matrix, and each element in the matrix is a non-zero element.