Wireless Mesh Node Message Forwarding Using Shared Layout Elements
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Solution Overview
Problem
Wireless mesh networks face inefficiencies in data transmission due to excessive message retransmissions, leading to bandwidth waste and reduced transmission success rates, particularly in outdoor lighting systems where regulations limit node communication time, and existing optimizations require significant information exchange, which is prohibitive in dense networks.
Innovation Solution
Nodes in the network use topological information, such as layout plans and neighborhood data, to decide whether to forward messages, optimizing protocols like flooding, broadcasting, or multicasting by ensuring only relevant nodes retransmit messages based on shared layout elements, reducing unnecessary transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flooding protocol is used for message transmission, then message delivery coverage is improved, but bandwidth waste increases due to excessive retransmissions
Solution Approach 1:
The patent applies local quality by making forwarding decisions based on local topological information (layout elements) at each node. Nodes compare their stored layout elements with those in the received message and only forward if they share common layout elements, creating locally optimized forwarding behavior that reduces unnecessary transmissions while maintaining coverage.
Solution Approach 2:
The patent uses preliminary action by pre-storing layout element information (such as geographic area identifiers, street names, or region codes) in each node's memory during network initialization. This pre-stored information enables nodes to make immediate forwarding decisions without requiring real-time information exchange or complex routing calculations.
2Reliability
If more nodes retransmit messages to ensure coverage, then message delivery reliability is improved, but transmission collisions increase
Solution Approach 1:
Nodes use their local stored layout element information to determine whether they should forward messages. By comparing their local layout elements with those in the received message, nodes make intelligent forwarding decisions that reduce redundant transmissions and consequently reduce transmission collisions in the wireless medium.
Solution Approach 2:
Instead of requiring all nodes to forward messages (excessive action), the patent implements partial forwarding where only nodes that share layout elements with the message origin forward the message. This partial action is sufficient to achieve reliable delivery to all relevant nodes while minimizing collisions.
3Loss of energy
If duty-cycling regulations limit node transmission time, then energy consumption is reduced, but message delivery completeness deteriorates
Solution Approach 1:
Layout element information is pre-stored in nodes during network initialization, enabling rapid forwarding decisions that comply with duty-cycling regulations. Nodes can quickly determine whether to forward based on pre-stored information, reducing the time they need to occupy the communication channel while still ensuring complete message delivery to all relevant nodes.
Solution Approach 2:
The patent changes the parameter of forwarding decision-making from real-time information exchange to lookup-based decision-making using pre-stored layout elements. This parameter change reduces transmission time consumption by eliminating complex real-time calculations while maintaining message delivery completeness through intelligent selective forwarding.
4Loss of energy
If existing optimization methods are used to reduce transmissions, then bandwidth efficiency is improved, but information exchange overhead becomes prohibitive in dense networks
Solution Approach 1:
The patent performs the information exchange operation in advance during network initialization, storing layout element information in each node's memory. This preliminary action eliminates the need for continuous information exchange during message transmission, reducing overhead especially in dense networks where frequent exchanges would be prohibitive.
Solution Approach 2:
Each node stores a copy of relevant layout element information (such as area identifiers, street names, or region codes) in its local memory. This copying approach allows nodes to make independent forwarding decisions using local information without requiring real-time communication with other nodes, significantly reducing information exchange overhead.
Data Source
AI summary
For ensuring reliability of data transmission in a wireless mesh network, while reducing the data overhead of the transmissions, a node for a wireless mesh network and a method of controlling the same are provided, wherein the node is configured to decide about retransmission of a message received from a transmitting node, based on whether the transmitting node has at least one layout element of a layout plan in common with the node, at least one of the layout elements of the layout plan being associated with the node.