Directional Antenna Routing for Wind Turbine Yaw
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Solution Overview
Problem
Conventional wireless communication methods in wind farms using directional antennas fail to account for yawing wind turbines, leading to network congestion and packet collisions due to inefficient rebroadcasting, as each antenna broadcasts packets multiple times, resulting in excessive transmissions and redundant data.
Innovation Solution
A method and system that utilize directional antennas with sector-specific routing information, recalculating and updating transmission paths based on yaw thresholds to reduce redundant transmissions and optimize data packet rebroadcasting between wind turbines, ensuring efficient network-wide communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional flooding broadcast method is used with directional antennas, then network-wide broadcast coverage is achieved, but network congestion and packet collisions increase due to excessive redundant transmissions
Solution Approach 1:
The patent applies local quality by making rebroadcast decisions node-specific rather than uniformly across all nodes. Each node determines whether to rebroadcast based on its local position relative to the source node and the packet's origin information, allowing selective rebroadcasting that maintains coverage while reducing redundancy.
Solution Approach 2:
The patent implements preliminary action by embedding origin node identification information in packets before transmission. This pre-marking allows receiving nodes to make informed rebroadcast decisions without requiring complex real-time coordination, enabling efficient selective rebroadcasting while maintaining broadcast coverage.
2Reliability
If each node rebroadcasts received packets to ensure network-wide coverage, then all nodes receive data packets, but excessive redundant transmissions cause network congestion and packet loss
Solution Approach 1:
The patent makes rebroadcast behavior node-specific by having each node evaluate its local position and the packet's origin information. Nodes only rebroadcast when necessary for network coverage, avoiding redundant transmissions while ensuring all nodes receive packets, thus reducing transmission overhead while maintaining delivery reliability.
Solution Approach 2:
The patent implements self-service by enabling each node to autonomously determine whether to rebroadcast based on information embedded in the packet itself. Nodes use their own position data and the packet's origin identifier to make independent rebroadcast decisions, eliminating the need for centralized control while optimizing transmission efficiency.
3Speed
If directional antennas are used instead of omni-directional antennas, then transmission range and interference reduction are improved, but yawing wind turbines cause misalignment and communication failures
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing position information for all nodes in the network. This advance preparation enables nodes to determine optimal antenna pointing directions based on stored positional data and packet origin information, allowing the system to adapt to turbine yawing while maintaining directional transmission benefits.
Solution Approach 2:
The patent implements dynamics by making antenna pointing directions adaptive rather than fixed. Nodes dynamically adjust their transmit and receive antenna orientations based on the packet's origin node identification and stored position information, enabling the system to accommodate turbine yawing movements while maintaining effective directional communication.
Data Source
AI summary
Disclosed is a data transmission system having a multi-node wireless network in a geographic area within which a plurality of nodes are positioned, having a plurality of directional antennas fixed to respective nodes of the plurality of nodes, with each node including at least two directional antennas to transmit and receive in respective sectors emanating from each respective node. When yaw of a node exceeds a threshold amount, revised routing information is provided to identify preferred directional antennas for use in future link transmissions.