Sidelink Positioning Signal Power Control and Muting
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Solution Overview
Problem
In sidelink (SL) communication, there is a need for an effective method to control the power and mute transmission of positioning reference signals (PRS) to reduce interference with uplink transmission and other sidelink transmissions.
Innovation Solution
A method and apparatus for controlling power and muting transmission in SL communication, where a terminal device performs power control on a sidelink signal based on sidelink path loss and/or target communication distance, and mutes the transmission of PRS based on indication information and measurement results from other terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the first terminal transmits positioning reference signal at high power, then positioning measurement accuracy is improved, but interference with uplink and other sidelink transmissions increases
Solution Approach 1:
The patent implements dynamic power control for positioning reference signals by adjusting transmission power based on real-time channel conditions, path loss measurements, and interference levels. The terminal device dynamically determines power control parameters including path loss reference signals and adjustment values, enabling the system to adapt transmission power to current operational conditions rather than using fixed high power levels.
Solution Approach 2:
The patent changes key transmission parameters including power control adjustment values, path loss reference signal configurations, and transmission power levels based on measured channel conditions. By modifying these parameters dynamically, the system optimizes the balance between maintaining sufficient signal strength for accurate positioning measurements and reducing interference to other communications.
2Object-generated harmful factors
If power control is applied to positioning reference signal, then interference is reduced, but positioning signal quality may deteriorate
Solution Approach 1:
The patent implements feedback mechanisms where terminal devices measure path loss based on downlink path loss reference signals from the network device, then use these measurements to adjust uplink positioning reference signal transmission power. This closed-loop feedback ensures that power control decisions are based on actual channel conditions, maintaining signal quality while reducing interference.
Solution Approach 2:
The patent performs preliminary configuration of power control parameters including setting path loss reference signals and power control adjustment values before actual positioning reference signal transmission. This preliminary setup ensures that when transmission occurs, the appropriate power levels are already determined based on pre-measured channel conditions, preventing signal quality deterioration.
Data Source
AI summary
Provided is a method for controlling power. The method is applicable to a first terminal, and the method includes: performing power control on a first signal based on a sidelink path loss and/or a target communication distance, wherein the first signal comprises a positioning reference signal, and the sidelink path loss refers to a transmission loss on a sidelink between the first terminal and a second terminal.