Terminal PTRS Power Control for Simultaneous Multi-Panel Uplink
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Solution Overview
Problem
In future radio communication systems, the control of uplink transmission using multi-panel transmission is not adequately addressed, particularly in scenarios involving simultaneous multi-panel transmission, leading to unclear methods for determining transmission power ratios between phase tracking reference signals and physical uplink shared channels.
Innovation Solution
A terminal determines a first parameter related to the power of phase tracking reference signals corresponding to multiple panels and adjusts the transmission power ratio between the PTRS and PUSCH based on this parameter, enabling appropriate control of UL transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous multi-panel UL transmission is supported to improve UL throughput and reliability, then transmission capacity and robustness are improved, but control complexity and difficulty of determining transmission power ratios increase
Solution Approach 1:
The patent segments the transmission power control by introducing panel-specific first parameters (αPTRS,PUSCH) for each panel. This allows independent power ratio determination for each panel's PTRS relative to PUSCH, enabling fine-grained control in multi-panel transmission without requiring complex joint optimization across all panels simultaneously.
Solution Approach 2:
The patent applies local quality by allowing different first parameters to be configured for different panels. Each panel can have its own αPTRS,PUSCH value tailored to its specific transmission conditions, channel characteristics, and power requirements, rather than using a uniform parameter across all panels.
2Reliability
If simultaneous multi-panel UL transmission is supported to improve reliability, then transmission robustness is improved, but difficulty of determining transmission power ratios increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the first parameters (αPTRS,PUSCH) through higher-layer signaling before actual transmission occurs. The base station provides panel-specific power ratio parameters in advance, allowing the terminal to directly apply these pre-determined values during simultaneous multi-panel transmission without needing to perform complex real-time calculations.
Solution Approach 2:
The patent introduces higher-layer signaling as an intermediary mechanism that carries the first parameters from the base station to the terminal. This intermediary channel simplifies the power ratio determination process by providing pre-calculated, panel-specific parameters that the terminal can directly use, avoiding the need for the terminal to independently solve complex power allocation problems.
3Manufacturing precision
If panel-specific first parameters are configured to enable appropriate UL transmission control, then transmission control precision is improved, but signaling overhead increases
Solution Approach 1:
The patent applies dynamics by making the configuration of panel-specific first parameters flexible and conditional. The base station configures these parameters dynamically based on actual multi-panel transmission needs, adjusting the level of granularity and number of panel-specific parameters according to the transmission scenario, thereby balancing control precision with signaling overhead.
Data Source
Figure 1A~1B
Figure 2A~2C
Figure 3
AI summary
A terminal according to an aspect of the present disclosure includes a control section that determines a first parameter related to power of a phase tracking reference signal (PTRS) and corresponding to at least one of two panels and that determines, based on the first parameter, a transmission power ratio between the PTRS and a physical uplink shared channel (PUSCH), and a transmitting section that transmits the PTRS and the PUSCH. According to an aspect of the present disclosure, even when simultaneous transmission using multi-panel is supported, transmission control can be appropriately performed.