SRS Power Control for Multi-Antenna Uplink Interference
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Solution Overview
Problem
In New Radio (NR) systems, effective power control for Sounding Reference Signal (SRS) transmission is a pressing issue, as existing methods fail to efficiently manage power distribution across multiple SRS resource sets, particularly when multiple antenna panels are used, leading to uplink interference.
Innovation Solution
A wireless communication method where a terminal device obtains and utilizes maximum sending power and transmit power control (TPC) information for each SRS resource set, allowing it to adjust power levels based on its own power level and network configuration, and a network device sends TPC information to the terminal device, enabling precise power control for simultaneous SRS transmission across multiple antenna panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SRS resource sets are configured for simultaneous transmission across multiple antenna panels, then uplink coverage and reliability are improved, but uplink interference increases and power distribution becomes unmanageable
Solution Approach 1:
The patent segments the total maximum sending power into separate maximum sending powers for each SRS resource set. This segmentation allows independent power control for each antenna panel's SRS transmission, preventing interference while maintaining reliability. The terminal device determines maximum sending power per resource set based on total power constraints and individual resource requirements.
Solution Approach 2:
The patent applies local quality by assigning different maximum sending powers to different SRS resource sets based on their specific requirements. Each resource set receives optimized power allocation considering its antenna panel characteristics, channel conditions, and transmission priorities, thereby reducing overall interference while maintaining local transmission quality.
2Object-generated harmful factors
If power control is implemented for each SRS resource set individually, then uplink interference is reduced, but device complexity and power management overhead increase
Solution Approach 1:
The patent implements preliminary action by pre-configuring maximum sending powers for each SRS resource set before actual transmission occurs. The network device provides TPC commands that establish power parameters in advance, allowing the terminal device to perform autonomous power control without real-time complex calculations, thus reducing operational complexity while maintaining interference reduction benefits.
Solution Approach 2:
The patent enables self-service through autonomous power control at the terminal device. Once maximum sending powers are configured for each resource set, the terminal device automatically manages its own power distribution across antenna panels without continuous network intervention, reducing signaling overhead and simplifying power management while effectively controlling uplink interference.
3Device complexity
If maximum sending power is allocated uniformly across all SRS resource sets, then device complexity is reduced, but transmission efficiency and interference management deteriorate
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting maximum sending power parameters for each SRS resource set based on transmission conditions. The network device provides TPC commands that modify power parameters according to channel quality, interference levels, and QoS requirements, optimizing transmission efficiency without requiring complex real-time calculations at the terminal device.
Data Source
AI summary
Implementations of the present disclosure provide a wireless communication method and devices. The method comprises: a terminal device obtains maximum sending power and/or transmit power control (TPC) information corresponding to each sounding reference signal (SRS) resource set in at least one SRS resource set; and sends an SRS by using SRS resources in each SRS resource set on the basis of the maximum sending power and/or TPC information corresponding to each SRS resource set.