Adaptive Vehicle Communication Rate Control
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Solution Overview
Problem
In vehicular communication systems, channel congestion due to frequent transmission of movement notifications leads to delayed receipt of critical safety information, causing vehicles to move closer to each other and potentially increasing the risk of accidents.
Innovation Solution
A communication method where a first communication device detects movement parameters at two different time points and selectively transmits them based on a comparison between estimated internal and external movement parameters, reducing unnecessary transmissions and maintaining accurate position estimation of nearby vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission rate of movement notifications is increased to provide timely safety information, then the reliability of safety information delivery is improved, but channel congestion increases causing delays in receiving critical notifications
Solution Approach 1:
The patent dynamically changes the transmission rate parameter based on relative velocity between vehicles. When relative velocity exceeds a threshold, the transmission rate is increased to ensure timely safety information delivery. When relative velocity is low, the transmission rate is decreased to reduce channel congestion. This adaptive parameter adjustment resolves the contradiction by matching transmission frequency to actual safety needs.
Solution Approach 2:
The system transitions from static fixed-rate transmission to dynamic adaptive transmission. The transmission rate automatically adjusts according to real-time relative velocity measurements, allowing the system to optimize between timely information delivery and channel congestion prevention based on current operational conditions.
2Quantity of substance
If the transmission rate is decreased to reduce channel congestion, then the channel bandwidth availability is improved, but the position estimation accuracy deteriorates due to larger time intervals between notifications
Solution Approach 1:
The patent adjusts the transmission rate parameter based on relative velocity to optimize the balance between channel bandwidth usage and position estimation accuracy. By transmitting more frequently when vehicles are moving apart and less frequently when moving together, the system maintains adequate position tracking while conserving channel resources.
3Measurement precision
If movement notifications are transmitted frequently to track vehicle position accurately, then the position estimation accuracy is improved, but channel congestion increases reducing overall system efficiency
Solution Approach 1:
The transmission rate parameter is dynamically changed based on relative velocity conditions. High transmission rates are used only when necessary (high relative velocity indicating potential safety risks), while low transmission rates are used when vehicles are moving together, thereby maintaining position estimation accuracy when needed while improving overall system communication efficiency.
Data Source
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AI summary
A communication device, a communication and associated communication method are provided. The communication device is placed at a first moving device and the communication device includes a movement detection module, a transmitter, and a controller. The movement detecting module detects movement of the first moving device to obtain at least one first movement parameter at a first time point, and detects the movement of the first moving device to obtain at least one second movement parameter at a second time point latter than the first time point. The transmitter transmits the at least one first movement parameter. By estimating position of the first moving device at the second time point, the controller obtains an estimated internal movement parameter. The controller controls the transmitter to transmit the at least one second movement parameter selectively according to the estimated internal movement parameter and the at least one second movement parameter.