Wireless Mesh Node Transfer Table for Path Stability
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Solution Overview
Problem
Existing multi-hop wireless networks face instability in communication due to reliance on hop steps for path determination, leading to poor communication quality and increased collision risks, especially in routing methods, and excessive data transmission in flooding methods.
Innovation Solution
Implementing a wireless mesh network with a communication control unit that utilizes a transfer table linking transfer destinations with priorities, switching between broadcast and unicast communication based on determined transfer priorities, and using wait times to optimize packet transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If routing method is used to determine communication path by number of hop steps, then communication path can be determined efficiently, but communication quality deteriorates and stability decreases when path quality degrades
Solution Approach 1:
The patent changes the parameter for path selection from solely using hop step count to using a composite metric that includes communication quality indicators. This allows the system to maintain efficient path determination while selecting paths with better actual communication quality, resolving the contradiction between productivity and reliability.
Solution Approach 2:
The patent implements feedback mechanisms where communication quality information is continuously collected and used to adjust path selection. This feedback loop enables the system to adapt to changing communication conditions and maintain stable communication by selecting paths with better quality, even when hop steps increase.
2Adaptability or versatility
If flooding method is used for information transfer, then communication coverage is improved, but amount of communication data increases and collision possibility increases
Solution Approach 1:
The patent applies local quality by allowing different wireless apparatuses to use different transmission methods (unicast or broadcast) based on their specific situation and the transfer table information. This enables coverage improvement where needed while minimizing unnecessary data transmission in other areas, resolving the contradiction between adaptability and data quantity.
Solution Approach 2:
The patent segments the communication approach by dividing the network into different transmission zones based on the transfer table. Some apparatuses use unicast for efficient targeted transmission while others use broadcast for coverage, allowing the system to achieve good coverage without excessive data transmission from all nodes.
3Adaptability or versatility
If broadcast communication is used for packet transfer, then communication coverage is improved, but collision risk increases
Solution Approach 1:
The patent makes the transmission method dynamic by allowing wireless apparatuses to switch between unicast and broadcast based on real-time conditions and transfer table information. This dynamic adaptation enables the system to use broadcast only when necessary for coverage while using unicast to avoid collisions in situations where targeted transmission is sufficient.
Data Source
AI summary
A wireless apparatus includes a communication control unit, a transmission unit for transmitting a message packet, a reception unit for receiving the message packet, and a storage unit for storing a transfer table in which transfer destination information is linked with a transfer priority indicating its priority among wireless apparatuses for transferring the message packet to a transfer destination. The communication control unit refers to the transfer table based on information on a transmission source and a transmission destination included in the received message packet. When the wireless apparatus of the transfer destination or the transfer priority is not determined, the communication control unit performs a transfer operation using broadcast communication. When the wireless apparatus of the transfer destination and the transfer priority are determined, the communication control unit performs a transfer operation using unicast communication in which the wireless apparatus of the transfer destination is specified.