Vehicle Communication Device Distance-Based Transmission Control
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Solution Overview
Problem
Existing communication devices face high power consumption due to constant monitoring for request transmissions, which is inefficient in reducing overall power usage.
Innovation Solution
A communication device that periodically receives position information from other vehicles and transmits presence information only when the distance between vehicles is less than a threshold, using optimized transmission power to minimize unnecessary broadcasts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the communication terminal constantly monitors for request transmissions, then the collision avoidance function is maintained, but the power consumption cannot be reduced
Solution Approach 1:
The communication terminal switches from constant monitoring to periodic monitoring of position information. Instead of continuously checking for requests, the system periodically receives position data from the vehicle and only transmits presence information when necessary (when distance is less than threshold), thereby reducing power consumption while maintaining collision avoidance capability
Solution Approach 2:
The system dynamically adjusts its behavior based on real-time distance calculations. The communication terminal changes its monitoring and transmission activities according to the current distance to the vehicle, transitioning between active monitoring and low-power states based on actual operational needs rather than maintaining constant activity
2Reliability
If the communication terminal transmits presence information continuously, then the collision avoidance function is ensured, but the power consumption increases
Solution Approach 1:
The system replaces continuous transmission with periodic, conditional transmission. Presence information is transmitted only when the calculated distance is less than the threshold, eliminating unnecessary transmissions and reducing energy consumption while maintaining effective collision avoidance when needed
Solution Approach 2:
The system changes the transmission parameter from continuous to conditional based on distance. By using distance as a control parameter, the system adjusts transmission behavior dynamically, transmitting only when the distance condition is met, thereby reducing overall energy consumption
Data Source
AI summary
A communication device mounted on a first vehicle, the communication device includes a wireless communication unit configured to receive second information that is periodically transmitted from a second vehicle and includes at least position information of the second vehicle, and a control unit configured to specify a distance between the first vehicle and the second vehicle based on the second information, transmit first information indicating presence of the first vehicle through the wireless communication unit when the distance is less than a threshold, and not transmit the first information when the distance is equal to or larger than the threshold.