V2V Communication Control Device with Dynamic Cycle Adjustment
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Solution Overview
Problem
In vehicle-to-vehicle communication systems, the need for real-time information sharing is contradicted by the demand to reduce communication charges, as direct wireless communication is affected by issues like the hidden terminal problem and shadowing, especially when using wide area communication networks.
Innovation Solution
A communication control device that employs both short-range and wide-area communication modules, adjusting transmission cycles based on communication quality to maintain real-time information sharing while minimizing network usage, by using a short-range module for direct communication and a wide-area module for indirect communication when quality is low.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vehicles transmit vehicle information packets frequently over the wide area communication network to ensure real-time information sharing, then the real-time information sharing is improved, but the communication charges increase
Solution Approach 1:
The patent segments the communication system into two parts: direct short-range communication between vehicles and indirect wide-area communication through the network. This segmentation allows the system to use the cheaper direct communication path whenever possible, reserving wide-area communication for cases where direct communication is unavailable, thus reducing overall communication charges while maintaining real-time information sharing.
Solution Approach 2:
The patent introduces a communication quality determination unit as an intermediary that monitors the quality of direct vehicle-to-vehicle communication and dynamically switches between direct and indirect communication paths. This intermediary enables the system to adapt to changing communication conditions, ensuring real-time information sharing while minimizing wide-area network usage and associated charges.
2Loss of energy
If vehicles use direct wireless communication to avoid communication charges, then communication charges are reduced, but communication quality deteriorates due to hidden terminal problems and shadowing
Solution Approach 1:
The patent implements dynamic adaptation by continuously monitoring communication quality metrics and adjusting the communication path in real-time. When direct communication quality falls below a threshold due to hidden terminal problems or shadowing, the system dynamically switches to wide-area network communication, and vice versa. This dynamic approach ensures communication reliability while minimizing wide-area network usage.
Solution Approach 2:
The patent incorporates a communication quality determination unit that provides feedback on the state of direct vehicle-to-vehicle communication. This feedback mechanism allows the system to detect degradation in communication quality caused by environmental factors and adjust its communication strategy accordingly, maintaining reliability while reducing communication charges through optimized path selection.
3Reliability
If the transmission cycle of vehicle information packets is shortened to improve real-time information sharing, then the real-time information sharing is improved, but the communication traffic and charges increase
Solution Approach 1:
The patent segments communication traffic into direct vehicle-to-vehicle transmissions and wide-area network transmissions. By maintaining frequent direct transmissions with short transmission cycles, the system achieves real-time information sharing without proportionally increasing wide-area network traffic. The segmentation allows local high-frequency communication to satisfy real-time requirements while reducing overall network traffic volume.
Solution Approach 2:
The patent applies partial action by using wide-area network communication only when necessary (when direct communication quality is insufficient), rather than continuously. This partial usage of the wide-area network maintains real-time information sharing capability without generating excessive communication traffic and charges, achieving the desired reliability with minimal additional traffic.
Data Source
AI summary
A vehicular communication control device includes: a short range communication processor executing a direct vehicle-to-vehicle communication; a wide area communication processor executing an indirect vehicle-to-vehicle communication; a vehicle data generator; and a communication quality determination unit determining a communication quality of the direct vehicle-to-vehicle communication. The short range communication processor wirelessly transmits a communication packet including vehicle data in a predetermined short range transmission cycle. The wide area communication processor: transmits the communication packet including the vehicle data to the peripheral vehicle in a predetermined wide range transmission cycle; selects a predetermined first wide area transmission cycle longer than the short range transmission cycle when the communication quality is equal to or higher than the permissible level; and selects a predetermined second wide area transmission cycle equal to or smaller than the short range transmission cycle when the communication quality is lower than the permissible level.