Power Control for Non-Coherent UEs Using Precoding Codewords
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Solution Overview
Problem
In the context of multi-antenna technology, particularly in the new radio (NR) system, UEs with partial coherent or non-coherent capabilities are limited in using maximum power during codebook-based transmission, as they cannot utilize codewords exceeding their coherent capabilities, leading to reduced sending power and performance.
Innovation Solution
A power control implementation method that allows UEs with non-coherent or partial coherent capabilities to use precoding codewords exceeding their coherent capabilities, enabling full power sending by selecting appropriate codewords and adjusting phase differences between antenna ports, thereby supporting full power transmission even with multiple antenna ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If UEs with non-coherent or partial coherent capabilities use codebook-based transmission, then device complexity is reduced, but sending power is limited and cannot reach maximum capacity
Solution Approach 1:
The patent changes the power allocation parameters by introducing a power scaling factor that allows UEs to transmit at full power regardless of coherent capability. The power scaling factor is adjusted based on the number of antenna ports and codebook configuration, enabling non-coherent and partial coherent UEs to achieve maximum power transmission while maintaining device complexity at acceptable levels.
2Reliability
If UEs use only codewords within their coherent capabilities, then transmission reliability is maintained, but power utilization is inefficient and maximum power cannot be achieved
Solution Approach 1:
The patent introduces dynamic power scaling factors that adapt based on the UE's coherent capability level and the selected codebook. The power scaling factor is dynamically adjusted to allow UEs to transmit at maximum power while selecting appropriate codewords from extended codebooks, thereby improving power utilization efficiency without compromising transmission reliability through proper codebook selection.
3Reliability
If multiple antenna ports are used for transmission, then transmission diversity is improved, but power per antenna is reduced due to power sharing
Solution Approach 1:
The patent merges the power resources of multiple antenna ports by introducing a power scaling mechanism that aggregates the total power capacity. Instead of distributing power equally across antennas with individual limits, the system combines the power resources and allocates them based on the power scaling factor, allowing the sum of power across all antenna ports to reach the maximum power capacity while maintaining transmission diversity through multiple antenna usage.
Data Source
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AI summary
Disclosed are a power control implementation method and apparatus, a communication node, and a computer-readable storage medium. The method comprises: acquiring information of a TPMI; determining, according to the information of the TPMI, at least one precoding codeword in a preconfigured precoding codeword set; and sending a transmission to a second communication node according to the at least one precoding codeword.