Sidelink Positioning Power Control for SL-PRS and PSCCH
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing SL positioning technologies lack a solution for controlling the transmit power of signals between terminal devices, such as vehicles, to ensure effective detection and reduce interference.
Innovation Solution
A power control method and apparatus that configures separate power control parameters for SL-PRS and PSCCH transmissions, determining transmit power based on parameters like channel busy ratio, transmission priority, and pathloss, ensuring consistent power control across resources and simplifying the implementation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate power control parameters are configured for SL-PRS and PSCCH transmissions, then power control precision is improved, but device complexity increases
Solution Approach 1:
The patent divides power control into separate parameters for SL-PRS (sidelink positioning reference signal) and PSCCH (physical sidelink control channel) transmissions. This segmentation allows independent optimization of power control for each signal type, improving precision while managing complexity through structured parameter separation.
Solution Approach 2:
Different power control parameters are applied to different signal types (SL-PRS and PSCCH) based on their specific requirements. This local quality approach ensures that each signal receives appropriately tailored power control settings, optimizing performance for positioning and control functions separately.
2Reliability
If transmit power is controlled based on multiple parameters (CBR, priority, pathloss), then signal detection reliability is improved, but calculation complexity increases
Solution Approach 1:
The patent pre-configures power control parameters including pathloss reference signals and maximum transmit power values before actual transmission. This preliminary action reduces real-time calculation complexity by having reference values ready, while still achieving reliable signal detection through multi-parameter control.
Solution Approach 2:
The power control mechanism incorporates feedback from channel busy ratio (CBR) measurements and pathloss estimates to dynamically adjust transmit power. This feedback loop improves signal detection reliability by adapting to changing channel conditions while managing complexity through established feedback protocols.
3Measurement precision
If power control parameters are configured by network device, then power control precision is improved, but network overhead increases
Solution Approach 1:
The network device configures power control parameters that serve multiple functions: pathloss reference signals are used for both downlink communication and sidelink positioning power control. This universality reduces network overhead by reusing existing configuration structures for multiple purposes while maintaining precision.
Data Source
Figure 1(a)~1(c)
Figure 2
Figure 3~5
AI summary
This application provides a power control method and control apparatus. In this application, at least one of information such as a power control parameter of an SL-PRS, maximum transmit power of a terminal device, a quantity of RBs occupied by a first resource used to transmit the SL-PRS, DL pathloss reference signal configuration information, and SL reference signal received power is obtained, to determine first transmit power at which the terminal device transmits the SL-PRS through the first resource; and at least one of information such as a power control parameter of a PSCCH, maximum transmit power of the terminal device, a quantity of RBs occupied by a second resource used to transmit the PSCCH, DL pathloss reference signal configuration information, and SL reference signal received power is obtained, to determine second transmit power at which the terminal device transmits the PSCCH through the second resource. This application implements power control of an SL-PRS and a PSCCH in an SL positioning technology.