Uplink Transmit Power Control for Multiple TRPs
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink transmission and reception, particularly in supporting multiple transmission and reception points (TRPs) with varying transmit power control, which affects data traffic, latency, and energy efficiency.
Innovation Solution
A method and apparatus for controlling transmit power during uplink channel transmission and reception in a wireless communication system, allowing for individual power determination for multiple TRPs, using downlink control information to manage power control commands and optimize power usage across multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple TRPs are supported with individual power determination, then the capacity and efficiency of uplink transmission is enhanced, but the device complexity increases due to multiple power control mechanisms
Solution Approach 1:
The patent segments the power control mechanism by introducing separate TPC command fields in DCI for different TRPs (e.g., first TPC command for first TRP, second TPC command for second TRP). This allows independent power control for each TRP while maintaining a structured, manageable framework that doesn't overly complicate the overall system.
Solution Approach 2:
The patent adds a dimensional aspect to power control by introducing TRP-specific power control parameters and multiple TPC command fields within the DCI structure. This multi-dimensional approach enables differentiated power control for multiple TRPs without requiring completely separate control systems, thus enhancing capacity while controlling complexity.
2Use of energy by moving object
If dynamic power management is implemented across multiple TRPs, then energy efficiency is improved, but the control mechanism complexity increases
Solution Approach 1:
The patent implements dynamic power management by allowing real-time adjustment of uplink transmit power for different TRPs through TPC commands embedded in DCI. The terminal can dynamically change power levels based on received TPC commands, enabling adaptive energy efficiency without requiring complex centralized control for every power adjustment.
Solution Approach 2:
The patent employs feedback mechanisms where the base station monitors uplink reception quality from multiple TRPs and sends TPC commands back to the terminal to adjust power levels. This feedback loop enables energy efficiency improvements through adaptive power control while keeping the control complexity manageable through standardized feedback protocols.
3Productivity
If individual power determination for multiple TRPs is implemented, then uplink transmission efficiency is enhanced, but the signal processing complexity increases
Solution Approach 1:
The patent segments the power determination process by associating specific TPC command fields with specific TRPs. The terminal processes power control information separately for each TRP based on the segmented TPC commands in DCI, enabling efficient individual power determination while maintaining organized, manageable signal processing through clear segmentation of control information.
Data Source
AI summary
Disclosed are a method and an apparatus for uplink transmission and reception in a wireless communication system. A method for transmitting an uplink channel according to an embodiment of the present disclosure may comprise the steps of: receiving downlink control information (DCI) from a base station; and transmitting the uplink channel to the base station on the basis of the DCI. N (N is a natural number) transmit power control (TCI) command values may be indicated by the DCI, and transmission power of the uplink channel may be determined on the basis of one of the N TPC command values.