Wireless Power Over Network Energy Recharge for IoT Nodes
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Solution Overview
Problem
Low-Power and Lossy Networks (LLNs) and Internet of Things (IoT) devices face challenges with battery durability due to infrequent data transmission, requiring efficient power management in resource-constrained environments.
Innovation Solution
Implementing a Power Over Wireless Energy Recharge (POWER) system that allows nodes in a wireless network to capture and store electrical power from wireless communications, using battery-shaped stations that convert wireless network communications into stored electrical power, with mechanisms for controlled power transmission based on node requests and schedules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If battery-powered LLN and IoT devices transmit data infrequently to conserve energy, then battery durability is extended, but the devices cannot maintain adequate power levels for sufficient operation time
Solution Approach 1:
The patent combines communication and power transfer functions into a single wireless infrastructure. The access point simultaneously handles data communication and wireless power transfer through integrated hardware components (wireless transceiver and power amplifier), allowing devices to receive both data and energy through the same wireless medium without requiring separate power infrastructure
Solution Approach 2:
The wireless access point is designed with multi-functionality, serving both as a communication node and a power transmission source. The system enables the infrastructure to provide dual services (data and power) through a single device, reducing the need for separate power sources at remote locations
2Use of energy by moving object
If wireless power transmission is implemented to extend battery life, then power availability is improved, but network traffic may be disrupted
Solution Approach 1:
The system implements periodic power transmission at scheduled intervals rather than continuously. The access point transmits power during designated time windows, allowing normal network operations to proceed between transmission cycles. This periodic approach ensures power delivery while minimizing interference with data traffic
Solution Approach 2:
The power transmission parameters are dynamically adjusted based on network conditions and device power needs. The system can modify transmission power levels, timing, and duration in response to changing traffic patterns and battery status, optimizing both power delivery and network performance
3Duration of action of moving object
If battery capacity is increased to provide sufficient stored charge, then operation time is extended, but device size and cost increase
Solution Approach 1:
The system performs preliminary power transmission during periods when devices do not need to transmit data. By charging devices in advance during low-activity periods, the infrastructure reduces the need for large onboard battery capacities, as devices receive incremental power top-ups rather than relying solely on initial battery charge
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables extended battery life for LLN and IoT devices by leveraging wireless networks for power scavenging, reducing the need for frequent battery replacements and maintaining network stability without disrupting regular communication traffic.
Implementation Method 1
The node converts the wireless network communications into stored electrical power
Data Source
AI summary
In one embodiment, a device in a wireless network receives a request from a node in the network requesting electrical power. The device determines one or more power transmission parameters for the node. The device determines a power transmission schedule for the node. The device sends wireless network communications to the node in response to the request and based on the determined one or more power transmission parameters and transmission schedule for the node. The node converts the wireless network communications into stored electrical power.