Uplink Transmit Power Optimization in Multi-Panel Wireless Nodes
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Solution Overview
Problem
In wireless communication systems, particularly in NR R17 and subsequent versions, optimizing uplink transmit power across multiple TRPs/panels with varying UE capabilities is challenging due to limitations in multi-TRP/panel-based transmission schemes, leading to suboptimal power usage and increased complexity.
Innovation Solution
A method is introduced where a precoding matrix set is determined for each panel to enable full-power transmission, optimizing uplink transmit power by establishing a one-to-one correspondence between reference signal resource sets and full-power precoding matrix sets, reducing signaling overhead and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-TRP/panel-based transmission is used to increase transmission reliability, then communication reliability is improved, but device complexity increases due to varying UE capabilities across different panels
Solution Approach 1:
The patent segments the precoding matrix configuration by creating separate precoding matrix sets for different panels. Each panel can have its own precoding matrix set configured independently, allowing the UE to handle multi-TRP/panel transmission with reduced complexity by processing each panel separately rather than managing all panels uniformly.
Solution Approach 2:
The patent applies local quality by allowing different panels to have different precoding matrix configurations tailored to their specific capabilities. Each panel can be optimized independently with appropriate precoding matrices, rather than applying a uniform configuration across all panels, thus reducing overall device complexity while maintaining reliability.
2Power
If full-power transmission is enabled through precoding matrix set reporting, then transmit power efficiency is improved, but signaling overhead increases due to reporting requirements
Solution Approach 1:
The patent merges the reporting of precoding matrix sets with existing uplink control information channels. By integrating the precoding matrix set reporting into existing signaling structures rather than creating separate dedicated reporting channels, the patent reduces additional signaling overhead while still enabling full-power transmission capabilities.
Solution Approach 2:
The patent makes the precoding matrix set reporting mechanism universal by designing it to work across different UE capabilities and transmission scenarios. The same reporting structure serves multiple functions including indicating precoding preferences, panel capabilities, and power allocation requirements, thereby reducing overall signaling overhead through multi-functionality.
Data Source
AI summary
The present disclosure provides a method and a device in a node used for wireless communications. A first node receives a first signaling; and transmits a first signal. The first signaling indicates scheduling information for the first signal; a linear value of transmit power for the first signal is equal to a product of a linear value of a second power and a first coefficient; the first signaling is used to determine a first reference signal resource and a first matrix; the first reference signal resource belongs to a first reference signal resource set of S reference signal resource sets; S matrix sets respectively correspond to the S reference signal resource sets. The above method optimizes the transmit power on each panel in the multi-panel-based uplink transmission.