Vehicle Communication Device V2V AP Selection
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Solution Overview
Problem
Conventional vehicle communication devices, such as those described in Japanese Patent No. 6479652, face challenges in maintaining stable connections to access points, particularly when a customer terminal connects to a new access point, leading to deteriorated communication quality.
Innovation Solution
A vehicle communication device equipped with a vehicle-to-vehicle communication unit to receive access point information from nearby vehicles, an information extraction unit to identify connected access point information from the lead vehicle, and an access point communication unit to wirelessly connect to the access point with the strongest radio wave signal, ensuring optimal communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the customer terminal autonomously searches for access points when connecting to a new access point, then the terminal can independently establish connection, but the connection time increases and communication quality may deteriorate
Solution Approach 1:
The system performs preliminary actions by having the lead vehicle search for and identify suitable access points before the own vehicle reaches the same location. The access point information is pre-acquired and transmitted via V2V communication, so when the own vehicle needs to connect, the search process is already completed, significantly reducing connection establishment time.
Solution Approach 2:
The patent introduces an intermediary mechanism where the lead vehicle acts as a mediator to provide access point information to the own vehicle. Instead of the own vehicle directly searching for access points (which takes time), it receives pre-searched information from the lead vehicle through V2V communication, thus resolving the time loss while maintaining autonomous connection capability.
2Reliability
If the customer terminal performs extensive search processes to find the best access point, then connection reliability improves, but the time required for connection increases
Solution Approach 1:
The lead vehicle performs the extensive search process in advance to identify reliable access points with strong radio wave strengths. This pre-search ensures connection reliability is established beforehand, and the results are transmitted to the own vehicle, eliminating the need for the own vehicle to repeat the time-consuming search while maintaining high reliability standards.
Solution Approach 2:
The system implements feedback by having the lead vehicle transmit access point information (including radio wave strength and connection status) to the own vehicle. This feedback mechanism provides the own vehicle with pre-validated, reliable access point data, ensuring high connection reliability without requiring extensive real-time searching.
3Speed
If the vehicle connects to any available access point, then connection speed is fast, but communication quality deteriorates
Solution Approach 1:
The patent applies local quality by selecting access points based on location-specific characteristics, specifically choosing access points with the strongest radio wave strength in the local area. The lead vehicle evaluates multiple access points and selects the one with optimal local quality (strongest signal), then transmits this information to the own vehicle, enabling fast connection to a high-quality access point rather than any available one.
Solution Approach 2:
The system changes the selection parameter from simple availability to radio wave strength. Instead of connecting to any available access point, the lead vehicle searches for access points ordered by radio wave strength and selects the strongest one. This parameter change enables both fast connection speed and high communication quality by prioritizing signal strength in the selection criteria.
Data Source
AI summary
A vehicle communication device includes a vehicle-to-vehicle communication unit, an information extraction unit, and a Wi-Fi module. The vehicle-to-vehicle communication unit is mounted on an own vehicle and receives AP information required for wireless connection to an access point for communication relay from another vehicle in the vicinity. The information extraction unit extracts, from vehicle-to-vehicle AP information, which is AP information received from the other vehicle in the vicinity by the vehicle-to-vehicle communication unit, connected AP information, which is AP information received from the other vehicle in front in a traveling direction of the own vehicle and AP information of the access point to which the other vehicle in front is being connected. The Wi-Fi module wirelessly connects to the access point based on the connected AP information extracted by the information extraction unit.