Wireless LAN Client Logical Proximity Routing
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Solution Overview
Problem
Existing wireless communication systems for vehicles lack efficiency in information communication, as they do not effectively determine which vehicle should relay information next, leading to suboptimal data transmission and reception times due to constantly changing node positions in a network.
Innovation Solution
A wireless communication apparatus that calculates an assessment value based on logical proximity to a master node, allowing it to determine whether to transmit or receive information, forming a tree structure for efficient data flow without the need for dynamic routing tables, by exchanging assessment values with nearby nodes.
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 in a network with constantly changing vehicle positions, the validity period of routing information becomes extremely short and the system becomes unrealistic
Solution Approach 1:
The patent extracts the routing decision-making function from dynamic node-to-node exchanges and centralizes it in the master node. The master node generates assessment values for all slave nodes based on their logical proximity, and slave nodes simply follow these pre-determined routing instructions. This eliminates the need for continuous routing information exchange among moving nodes, resolving the contradiction between adaptability and validity period.
2Adaptability or versatility
If vehicles constantly change positions in the network, then network flexibility is improved, but the validity period of routing information becomes extremely short
Solution Approach 1:
The master node performs preliminary assessment of all slave nodes' logical proximity and generates routing assessment values in advance. These assessment values remain valid despite position changes because they are based on logical network topology rather than physical positions. Slave nodes use these pre-generated values for routing decisions without needing frequent updates, thus maintaining network flexibility while extending routing information validity.
3Measurement precision
If assessment values are exchanged frequently to maintain accurate routing information, then routing precision is improved, but communication overhead and energy consumption increase
Solution Approach 1:
The patent merges the routing information generation function into a single master node that consolidates assessment data from all slave nodes. Instead of each node independently measuring and exchanging routing information, the master node centrally generates assessment values based on logical proximity relationships. This reduces redundant measurements and exchanges, maintaining routing precision while significantly lowering communication energy consumption in the vehicle ad-hoc network.
Data Source
AI summary
An apparatus which transfers information transmitted from a master node or addressed to the master node, comprises a generation unit that generates 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, transmit information having the master node as a transmission source to other apparatuses or receive information addressed to the master node from the other apparatuses; otherwise, transmit information addressed to the master node to the logically closest apparatus or receive information having the master node as a transmission source from the logically closest apparatus.