Wireless Communication Apparatus Logical Proximity Routing
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Solution Overview
Problem
Existing wireless communication systems for vehicles lack efficient information communication methods, particularly in dynamically changing networks where vehicle positions constantly shift, leading to short-lived routing information validity and inefficient data transfer.
Innovation Solution
A wireless communication apparatus that calculates an assessment value based on logical proximity to a master node, allowing it to determine the most efficient direction for information transfer and reduce redundant communications by integrating or delaying transmissions, thereby forming a tree structure for controlled information flow without the need for dynamic routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic routing is performed by having nodes exchange route information, then routing adaptability is improved, but the validity period of routing information becomes extremely short due to constant node position changes
Solution Approach 1:
The patent introduces an assessment value as an intermediary metric that indirectly represents routing quality without requiring continuous route information exchange. Each node calculates its own assessment value based on local observations (number of observable nodes, communication quality), and this single scalar value serves as a stable routing criterion that doesn't become invalid due to node movement, thus resolving the contradiction between routing adaptability and information validity duration
Solution Approach 2:
Each node independently calculates its own assessment value based on its local environment (number of observable nodes, communication quality metrics) without relying on route information from other nodes. This self-service approach eliminates the need for continuous route information exchange and updates, maintaining routing adaptability while ensuring the assessment value remains valid despite node position changes
2Ease of manufacture
If vehicles transfer data to each other using wireless LAN, then communication cost is reduced, but information communication efficiency deteriorates due to lack of efficient relay selection
Solution Approach 1:
The patent changes the parameter used for relay selection from complex route information to a simple assessment value that combines the number of observable nodes and communication quality metrics. This parameter change enables efficient relay selection using low-cost wireless LAN communication, as each node only needs to broadcast and compare assessment values rather than exchanging detailed route information, thus improving communication efficiency while maintaining low communication costs
Solution Approach 2:
The patent applies local quality by having each node independently evaluate its own communication environment and calculate its assessment value based on local conditions (observable nodes, communication quality). This localized assessment allows each node to make optimal relay decisions based on its specific situation, improving overall communication efficiency without requiring centralized control or expensive communication infrastructure
3Adaptability or versatility
If routing information is exchanged between nodes, then routing flexibility is improved, but communication overhead increases due to frequent updates needed in dynamic networks
Solution Approach 1:
The patent extracts the essential routing decision criterion from complex route information and condenses it into a single assessment value. By taking out only the critical factors (number of observable nodes, communication quality) and combining them into one metric, the system maintains routing flexibility while dramatically reducing communication overhead, as nodes only need to exchange this single value rather than detailed route tables
Data Source
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Figure 3A~3B
AI summary
An apparatus which transfers information addressed to a master node, comprises a generation unit configured to generate an assessment value representing logical proximity to the master node; a transmit unit that sends/receives the assessment value to/from other apparatuses; and a communication unit that, when this apparatus is an apparatus that is logically closest to the master node within a communication range, receive information addressed to the master node from other apparatuses, otherwise, transmit information addressed to the master node to the logically closest apparatus, wherein the communication unit is configured to generate a delay time based on the assessment value when transferring the information received from the other apparatuses to yet another apparatus.