Vehicle Access Point Obstacle Detection and Switching
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Solution Overview
Problem
Communication between a vehicle and an access point is often interrupted by obstacles, such as tall vehicles, leading to hindered reception of application information, especially when the access point lacks high-speed roaming capabilities.
Innovation Solution
A communication system that includes roadside units equipped with sensors and sensor information processing units to detect obstacles, creating obstacle information that is shared among access points and used by vehicle terminal devices to determine if radio waves are blocked, allowing for connection switching to alternative access points with stronger signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access point transmits application information to the vehicle, then the vehicle receives application information, but communication is interrupted by obstacles such as tall vehicles blocking radio waves
Solution Approach 1:
The patent introduces roadside units with sensor information processing units as intermediary components that detect obstacles and provide obstacle information to the access point. This intermediary system enables the access point to make informed decisions about communication relay, selecting alternative access points when obstacles block radio waves, thereby maintaining communication reliability despite physical obstructions.
Solution Approach 2:
The patent implements preliminary obstacle detection and information gathering before communication interruption occurs. The sensor information processing unit continuously detects obstacles and provides obstacle information in advance, allowing the access point to proactively select alternative access points before the current communication path is blocked, thus preventing communication interruption rather than just responding to it.
2Reliability
If the access point uses high-speed roaming to switch between access points, then communication continuity is maintained, but the system complexity and requirements for high-speed roaming capability increase
Solution Approach 1:
The roadside unit with sensor information processing unit acts as an intermediary that simplifies the access point selection process. Instead of requiring the access point itself to have complex high-speed roaming capabilities, the intermediary provides processed obstacle information that enables simpler, more efficient access point selection based on pre-analyzed environmental data.
Solution Approach 2:
The system performs preliminary obstacle detection and access point evaluation before communication interruption occurs. By continuously monitoring the environment and pre-identifying suitable alternative access points, the system avoids the need for complex real-time high-speed roaming mechanisms, reducing device complexity while maintaining communication continuity.
3Loss of information
If the vehicle terminal device connects to multiple access points sequentially along the travel route, then the vehicle acquires obstacle information from access points, but communication may be interrupted when obstacles block radio waves from the current access point
Solution Approach 1:
The patent implements a feedback mechanism where the vehicle terminal device receives obstacle information from access points, processes this information to determine radio wave blockage, and uses this feedback to select alternative access points. The access point selection determination unit continuously monitors obstacle information and adjusts access point selection based on this feedback, ensuring reliable communication despite obstacles.
Solution Approach 2:
The system performs preliminary obstacle detection and access point evaluation before communication interruption occurs. By continuously monitoring the environment and pre-identifying suitable alternative access points based on obstacle information, the system switches to alternative access points before the current communication path is blocked, preventing communication interruption.
Data Source
AI summary
When a tall vehicle stops near an access point, reception of application information from the access point may be hindered. Calculation as to whether or not a radio wave from the access point is blocked by an obstacle such as a tall vehicle is performed on the basis of obstacle information created by the access point. If the radio wave is blocked, connection to another access point around the access point from which the radio wave is blocked is searched for.