Dynamic Peak Reduction Tone Configuration for Sidelink Signals
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Solution Overview
Problem
Current wireless communication systems face challenges in dynamically configuring peak reduction tones (PRTs) for efficient sidelink signal transmission in V2X communication, particularly in achieving low latency and high reliability required for advanced driving and remote driving scenarios.
Innovation Solution
A method for transmitting sidelink signals by user equipment (UE) involves transmitting sidelink control information, mapping complex-valued modulation symbols to subcarriers using orthogonal frequency division multiplexing (OFDM), and dynamically configuring the number and pattern of peak reduction tones to minimize peak-to-average power ratio (PAPR), enabling flexible subcarrier set configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If peak reduction tones are dynamically configured for sidelink signal transmission, then the reliability and efficiency of signal transmission is improved, but the device complexity increases
Solution Approach 1:
The patent applies dynamics by enabling dynamic configuration of peak reduction tones based on real-time channel conditions. The gNodeB can adjust the number, position, and allocation of PRTs in different resource pools according to actual transmission requirements, transforming a static system into an adaptive one that optimizes performance under varying conditions.
Solution Approach 2:
The patent implements parameter changes by allowing flexible adjustment of multiple PRT parameters including the number of tones, their frequency positions, and allocation patterns across different resource pools. This enables optimization of PAPR reduction effectiveness while adapting to different transmission scenarios and channel conditions.
2Adaptability or versatility
If multiple subcarrier sets with different peak reduction tone configurations are used, then the adaptability of the system is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The patent applies segmentation by dividing the frequency resources into multiple subcarrier sets, each with specific PRT configurations. This allows different resource pools to be independently configured with appropriate peak reduction settings, enabling the system to adapt to various transmission scenarios while maintaining manageable complexity through structured organization.
Solution Approach 2:
The patent implements feedback mechanisms where the gNodeB receives channel state information from UEs and uses this feedback to determine optimal PRT configurations for different resource pools. This closed-loop approach enables adaptive configuration while simplifying measurement complexity through network-coordinated decision-making.
3Productivity
If the number of peak reduction tones is increased to minimize PAPR, then the signal transmission efficiency is improved, but the loss of time for configuration increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple subcarrier sets with different PRT configurations before actual transmission occurs. The gNodeB can prepare and store multiple configuration options in advance, allowing rapid selection and switching during transmission without time-consuming real-time configuration, thus achieving high transmission efficiency with minimal configuration delay.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the dynamic configuration of PRTs, improving the reliability and efficiency of sidelink signal transmission, thereby supporting low-latency and high-reliability V2X communications, such as in vehicle platooning, advanced driving, and remote driving applications.
Implementation Method 1
generating the sidelink data signal by orthogonal frequency division multiplexing (OFDM)-modulating the at least one complex-valued modulation symbol and the preconfigured value
Data Source
AI summary
The method for transmitting, by a user equipment, a sidelink signal in a wireless communication system is a sidelink signal transmission method comprising: transmitting sidelink control information (SCI); mapping, to a plurality of sub-carriers, at least one complex-valued modulation symbol, which is related to a sidelink data signal, and a preset value; generating the sidelink data signal by modulating the at least one complex-valued modulation symbol and the preset value by orthogonal frequency division multiplexing (OFDM); and transmitting the sidelink data signal on the basis of the SCI, wherein the SCI comprises information regarding a sub-carrier set including at least one sub-carrier, to which the preset value is mapped, from among the plurality of sub-carriers, and at least one of the location and number in a frequency domain of the at least one sub-carrier, to which the preset value is mapped, is different for each sub-carrier set.