Vehicle Communication Congestion Control via Parameter Balancing
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Solution Overview
Problem
Existing vehicle communication systems lack effective congestion control methods, leading to variations in communication parameters among vehicles, which can result in inefficient communication and potential congestion when the number of vehicles increases.
Innovation Solution
A vehicle-mounted device equipped with measurement, reception, and control means to detect congestion levels and adjust communication parameters such as transmission power, reception sensitivity, transmission communication rate, and transmission spacing based on average values received from other vehicles to mitigate congestion while reducing parameter differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power is decreased to avoid congestion, then congestion is avoided, but the difference in communication parameters among vehicles increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission power based on congestion state levels. When congestion is detected, vehicles modify their transmission parameters (power, rate, spacing) to adapt to the congested environment, thereby avoiding congestion while maintaining communication effectiveness.
Solution Approach 2:
The patent implements equipotentiality by having all vehicles in the system apply the same congestion control logic and parameter adjustment rules. This ensures that all vehicles operate at comparable parameter levels, preventing large disparities in communication parameters among different vehicles while collectively avoiding congestion.
2Reliability
If transmission power is decreased significantly to avoid congestion, then congestion is avoided, but communication efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by making transmission parameters adaptive rather than static. Vehicles continuously monitor congestion state levels and dynamically adjust their transmission power and other parameters in real-time, allowing the system to optimize communication efficiency while avoiding congestion under varying traffic conditions.
Solution Approach 2:
The patent implements partial action by adjusting only the necessary parameters to the extent required to avoid congestion. Rather than uniformly decreasing all transmission parameters excessively, the system applies minimal necessary adjustments to maintain communication efficiency while preventing congestion, avoiding over-correction that would harm productivity.
Data Source
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AI summary
The invention has the object of avoiding congestion while reducing differences between parameters for communication among vehicles. The vehicle-mounted device performing communication by radio signals with predetermined vehicle-mounted devices respectively equipped in a plurality of vehicles includes: a radio unit detecting radio signals to measure congestion level; a processor receiving, from each of the predetermined vehicle-mounted devices, a value of, among parameters relating to communication of the predetermined vehicle-mounted devices, a predetermined parameter for which the degree of contribution to congestion increases with increase in the value of the predetermined parameter ; and a controller decreasing, when the congestion level measured by the radio unit exceeds a predetermined threshold value, the value of the predetermined parameter of its own device if the value of the predetermined parameter of its own device is greater than the average of the values of the predetermined parameter received at the processor.