V2X Groupcast Power Control Using Dynamic Reliability Distance
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing transmission power and overhead when maintaining high reliability for groupcast messages, particularly in vehicle-to-everything (V2X) systems, especially near interaction points where the distance to the interaction point varies.
Innovation Solution
Dynamic adjustment of reliability distance based on vehicle positioning and environmental parameters, allowing for varying transmission power to maintain reliable groupcast message reception within a dynamically changing distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed reliability distance is used for groupcast messages, then communication reliability is maintained, but transmission power efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed reliability distance to a dynamic reliability distance that changes based on the vehicle's proximity to interaction points. The reliability distance is extended when approaching interaction points to ensure communication reliability, and reduced when away from interaction points to improve transmission power efficiency. This dynamic adjustment resolves the contradiction between maintaining reliability and optimizing energy usage.
2Area of stationary object
If a large reliability distance is used to include interaction regions, then communication coverage is improved, but transmission power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating the reliability distance based on spatial location relative to interaction points. The reliability distance is enlarged specifically in regions where interaction points are detected (such as intersections or pedestrian crossings), while using a smaller reliability distance in other areas. This localized adjustment ensures adequate coverage where needed without unnecessarily increasing power consumption throughout the entire communication area.
3Use of energy by moving object
If dynamic reliability distance adjustment is implemented, then transmission power efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies feedback by using positioning information about the vehicle's location relative to interaction points to dynamically adjust the reliability distance. The system continuously monitors the vehicle's position and feedback-based adjustments are made to the reliability distance parameter, enabling efficient transmission power usage while managing complexity through systematic feedback loops rather than complex algorithmic approaches.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A vehicle user equipment (VUE) may generate a groupcast message for transmission in a vehicle to everything (V2X) system. The VUE may transmit the groupcast message using a transmit power that is based on a reliability distance that corresponds to a region for providing feedback for the groupcast message, where the reliability distance is based on one or more positioning parameters of the VUE and one or more environmental parameters associated with the V2X system. The VUE may then monitor for feedback for the groupcast message.