Wireless Sensor Node Role Assignment for Energy Management
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Solution Overview
Problem
Wireless sensor networks face energy limitations due to battery-powered nodes in hard-to-reach locations, leading to inefficiencies and potential network breakdowns when high energy devices attempt to coordinate operations with multiple nodes simultaneously.
Innovation Solution
A method and system where wireless sensor nodes have node role and high energy device queues, allowing high energy devices to determine and broadcast node roles (source, forwarding, or affected nodes) to adjust sensor node behaviors, optimizing energy usage and network operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If high energy devices participate in the wireless sensor network to assist energy-constrained nodes, then energy availability is improved, but network stability deteriorates due to behavioral disorders from simultaneous coordination
Solution Approach 1:
The patent segments the node roles into distinct categories (source node, forwarding node, affected node) and assigns them to different sensor nodes based on their positions relative to high energy devices. This segmentation prevents simultaneous coordination conflicts by dividing the network into functional zones, where each zone has designated roles that avoid behavioral disorders while maintaining energy assistance benefits.
Solution Approach 2:
The patent applies local quality by determining different node roles for sensor nodes based on their local positions relative to high energy devices. Nodes within communication zones of high energy devices are assigned different roles compared to nodes outside these zones. This local differentiation enables coordinated energy assistance in specific areas while maintaining network stability in other areas.
2Use of energy by moving object
If multiple high energy devices simultaneously coordinate interactive operations with sensor nodes, then energy assistance is improved, but device complexity increases due to coordination conflicts
Solution Approach 1:
The patent segments the coordination task into simple role assignment operations. Instead of complex simultaneous coordination, the system divides the network into zones based on high energy device communication ranges and assigns predefined roles (source, forwarding, affected) to sensor nodes. This segmentation transforms complex coordination into simple role-based operations that can be executed independently by each node.
Solution Approach 2:
The patent introduces dynamic role assignment where sensor nodes can change their roles based on the presence and communication zones of high energy devices. The node role queue mechanism allows dynamic adjustment of roles when high energy devices enter or leave communication zones, enabling flexible energy assistance without requiring complex simultaneous coordination protocols.
3Device complexity
If sensor nodes operate independently without role assignment, then device complexity is reduced, but energy efficiency deteriorates when high energy devices are present
Solution Approach 1:
The patent implements self-service by enabling sensor nodes to autonomously determine their roles based on broadcasting messages from high energy devices. Each sensor node independently processes the broadcast information, updates its node role queue, and adjusts its behavior accordingly. This self-service mechanism improves energy efficiency through role-based coordination while maintaining operational simplicity through autonomous decision-making at each node.
Solution Approach 2:
The patent introduces feedback through the broadcast message mechanism where high energy devices transmit their presence and communication zone information to sensor nodes. Sensor nodes use this feedback information to update their node role queues and adjust their operations. This feedback mechanism enables energy-efficient coordination without requiring complex centralized control, as each node independently processes the feedback and adjusts its behavior.
Data Source
AI summary
A method and a system for adjusting behaviors of wireless sensor nodes in a wireless sensor network, and a wireless sensor network are provided. The method comprises: initializing wireless sensor nodes in the wireless sensor network, in which each of a node role queue and a high energy device queue of the node is initialized to be empty; for a high energy device in the wireless sensor network, computing a node role of each surrounding wireless sensor node, broadcasting a message including the node role of each surrounding wireless sensor node and an identifier of the high energy device; for each wireless sensor node, receiving the message broadcast by the high energy device, updating the node role queue and the high energy device queue according to the message, and adjusting a behavior thereof according to the updated node role queue.