IoT Reader Control for Batteryless Device Communication
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Solution Overview
Problem
The increasing demand for wireless data traffic and the proliferation of IoT devices pose challenges in efficiently powering and communicating with battery-less or low-energy devices, particularly in 5G and future wireless communication systems, due to the high maintenance costs associated with manual battery replacement or recharging.
Innovation Solution
Implementing ambient IoT (A-IoT) devices that harness energy from renewable sources like radio waves, light, motion, or heat, and utilizing advanced communication protocols such as OFDM and RF envelope detection for efficient communication between IoT readers and devices, including impedance matching and backscattering techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery-powered IoT devices are used to enable wireless communication, then communication capability is improved, but maintenance cost increases due to manual battery replacement or recharging
Solution Approach 1:
The patent removes the battery component entirely from the IoT device, extracting the energy storage function from the device itself. The device becomes passive, harvesting energy from ambient RF signals rather than relying on internal battery power, thereby eliminating maintenance costs associated with battery replacement.
Solution Approach 2:
The patent introduces an RF energy harvesting intermediary mechanism that converts ambient radio frequency energy into electrical energy to power the IoT device. This intermediary energy conversion system enables the device to operate without direct battery intervention, reducing maintenance requirements while maintaining communication capability.
2Ease of operation
If ambient energy harvesting is used to power IoT devices, then maintenance cost decreases by eliminating battery replacement, but energy availability becomes dependent on environmental conditions
Solution Approach 1:
The patent employs a multi-functional energy harvesting approach that captures energy from multiple ambient sources including RF signals, light, motion, and heat. This universal energy capture capability ensures the device can operate in diverse environmental conditions, mitigating the reliability concerns associated with single-source energy harvesting.
Solution Approach 2:
The patent utilizes parameter changes in ambient environmental conditions (RF signal strength, light intensity, motion levels, temperature gradients) to dynamically adjust energy harvesting efficiency. By adapting to varying environmental parameters, the system maintains reliable energy availability across different operating conditions.
3Productivity
If advanced communication protocols like OFDM and backscattering are used, then communication efficiency with low-power devices is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service communication where the passive IoT device performs backscattering modulation automatically in response to received RF signals. The device modulates its impedance to encode data without requiring complex transmission protocols or active processing, thereby maintaining high communication efficiency while minimizing device complexity.
Solution Approach 2:
The patent replaces complex active communication mechanisms with passive electromagnetic field interaction. Instead of using traditional transmit-receive radio protocols, the device uses impedance modulation in the electromagnetic field to communicate, substituting mechanical/electronic complexity with field-based interaction that is inherently simpler to implement in passive devices.
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 reliable and low-maintenance communication with IoT devices, reducing operational costs and extending their lifespan by eliminating the need for manual battery replacement, while supporting a large number of devices with minimal power consumption.
Implementation Method 1
harness energy from renewable sources like radio waves
Implementation Method 2
backscattering techniques
Data Source
AI summary
Apparatuses and methods for controlling a reader communicating with a device. A method for an Internet of Things (IoT) reader to communicate with a device includes receiving, from a base station (BS), first information related to a downlink (DL) reception or an uplink (UL) transmission between the IoT reader and the BS, receiving, from the BS, second information related to a reader-to-device (R2D) transmission or a device-to-reader (D2R) reception between the IoT reader and one or more devices, receiving, from the BS, third information related to executing a command, and transmitting a physical reader-to-device channel (PRDCH) to the device. The PRDCH indicates information related to executing the command. The PRDCH is device-specific to the device of the one or more devices, device-group-specific to the one or more devices, or common to all devices receiving the PRDCH. The method further includes transmitting, to the BS, fourth information related to execution of the command.