Adaptive V2X Transmit Power Control for Vehicle Speed
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Solution Overview
Problem
Current vehicle-to-everything (V2X) communication systems use fixed transmit power, which may not be optimal for varying vehicle speeds and priority levels, affecting communication range and reliability.
Innovation Solution
A vehicle-based device adjusts transmit power based on its speed and priority level, increasing power for higher speeds or priority to enhance communication range and decreasing power for lower speeds or priority to conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed transmit power is used for V2X communication, then device complexity is reduced and ease of operation is improved, but communication reliability and coverage range are insufficient for varying vehicle speeds
Solution Approach 1:
The patent applies dynamics by making the transmit power adjustable based on vehicle speed. The system transitions from a static fixed power mode to a dynamic adaptive power mode where the transmit power level changes according to the vehicle's current speed, allowing the communication system to adapt to varying operational conditions and maintain reliability across different speed ranges
Solution Approach 2:
The patent implements parameter changes by modifying the transmit power parameter based on vehicle speed measurements. The system monitors speed and adjusts the transmit power parameter accordingly, selecting from multiple predefined power levels to optimize communication performance for the current speed condition while managing energy consumption
2Length of stationary object
If transmit power is increased for higher vehicle speeds, then communication range is extended to provide sufficient reaction time, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts transmit power based on real-time vehicle speed measurements. At higher speeds, increased power extends communication range to provide adequate reaction time for safety-critical messages. At lower speeds, reduced power conserves energy since shorter range is sufficient. This dynamic adaptation resolves the contradiction between range requirements and energy consumption
Solution Approach 2:
The patent applies partial action by using only the necessary transmit power level required for each speed condition. Instead of consistently using maximum power to ensure adequate range at all speeds, the system uses elevated power only when high speed requires extended range, and reduces power when lower speeds are maintained, avoiding excessive energy consumption while meeting communication requirements
Data Source
AI summary
In vehicle-to-vehicle (V2V) or vehicle-to-everything (V2X) communication, the vehicle may wirelessly transmit a signal. However, transmission of a signal using a fixed transmit power may not be desirable. The transmit power should be adjusted based on various factors such as a vehicle speed and a priority level of the vehicle. The apparatus may be a device capable of wireless communication, and may be in a vehicle. The device determines one or more parameters associated with a vehicle including the device, the parameter including at least one of a speed of the vehicle or a priority level of the vehicle. The device sets a transmit power of the device based on the one or more parameters. The device transmits a message via wireless communication using the set transmit power.