V2X Warning Message Transmission via Dynamic Power and Frequency Control
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Solution Overview
Problem
Current wireless communication systems lack effective methods for transmitting warning messages in Vehicle to Everything (V2X) services to protect pedestrians and drivers from collisions, particularly in managing transmission power and frequency based on dynamic conditions such as vehicle velocity and population density.
Innovation Solution
The proposed solution involves a Message transmission Guideline Package (MGP) message that includes geographical coordination information and a value tag for updating warning messages, allowing vehicle user equipment (VUE) to determine transmission frequency and power based on velocity range class and population density, with the ability to adapt messages even when out of network coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If warning messages are transmitted frequently with high power to ensure timely notification, then road safety is improved, but energy consumption and network interference increase
Solution Approach 1:
The patent implements dynamic adjustment of transmission power and frequency based on real-time conditions. The VUE determines transmission parameters by considering velocity range class, population density, and network coverage status, allowing the system to optimize energy usage while maintaining safety requirements. When velocity increases or population density is high, transmission frequency and power are increased accordingly.
Solution Approach 2:
The system changes transmission parameters (power and frequency) based on multiple conditions including velocity range class, population density, and value tag expiration. This allows the system to adapt transmission characteristics to match actual safety needs, avoiding unnecessary high-power transmissions when conditions permit lower power usage.
2Speed
If transmission frequency is increased to adapt to higher vehicle velocity, then warning timeliness is improved, but network resource consumption increases
Solution Approach 1:
The transmission frequency is dynamically adjusted based on the vehicle's velocity range class. When a VUE detects increased velocity, it automatically increases transmission frequency to maintain appropriate warning intervals. This dynamic adaptation ensures safety requirements are met while avoiding excessive transmissions at lower velocities.
Solution Approach 2:
The system modifies transmission frequency as a function of velocity, population density, and other contextual factors. By changing this parameter adaptively rather than using a fixed frequency, the system optimizes network resource usage while maintaining safety performance across varying operational conditions.
3Measurement precision
If MGP messages are updated frequently to reflect changing conditions, then warning accuracy is improved, but device complexity increases
Solution Approach 1:
The system uses value tags to pre-indicate when MGP messages should be updated. This allows VUEs to efficiently manage message updates by checking the value tag rather than continuously processing all message parameters. The value tag acts as a preliminary indicator that simplifies the update decision-making process.
Solution Approach 2:
The value tag parameter is used to track and manage MGP message updates. By incorporating this specific parameter, the system can determine whether updates are needed without re-evaluating all message contents, thereby reducing processing complexity while maintaining warning accuracy.
Data Source
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AI summary
The present invention provides methods and apparatus for transmitting and receiving warning messages by using Vehicle to Everything (V2X) services. One of embodiments of the present invention is performed by a vehicle user equipment (VUE) and comprising steps of receiving a first Message transmission Guideline Package (MGP) message including geographical coordination information related with an MGP area and a value tag indicating time information for updating the MGP message; checking the value tag is changed or not; and transmitting a first warning message based on the first MGP message when the value tag is not expired; or transmitting a second warning message based on a second MGP message when the value tag is expired, wherein at least a transmission frequency or a transmission power for the second warning message are determined base on the second MGP message, and wherein the MGP area represents where MGP profiles are the same.