Ambient IoT Frame Structure for Low-Power Backscattering
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Solution Overview
Problem
Ambient IoT devices face high power consumption due to unnecessary features and complex frame structures, particularly in sidelink communications, which are not optimized for low-power, battery-free operations.
Innovation Solution
A new frame structure design for ambient IoT devices that includes a dedicated energizing signal, time and frequency multiplexing, and modulated signals to support efficient communication, reducing power consumption and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sidelink communications with standard frame structure are used for AIoT devices, then communication functionality is provided, but power consumption increases due to unnecessary features and complexity
Solution Approach 1:
The patent extracts and removes unnecessary features from the standard sidelink frame structure, including self-containment requirements, ACK/NACK feedback mechanisms, and excessive reference signals. This leaves only the essential components needed for AIoT backscattering communication, thereby reducing power consumption while maintaining core functionality.
Solution Approach 2:
The frame structure is segmented into minimal necessary components only, separating essential AIoT communication elements from unnecessary sidelink features. This segmentation allows the system to utilize only the required portions of the communication protocol, reducing overall complexity and power consumption.
2Reliability
If standard sidelink frame structure with many reference signals is used, then communication reliability is maintained, but device complexity increases
Solution Approach 1:
The patent extracts only the essential reference signals needed for AIoT backscattering communication, removing the numerous reference signals present in standard sidelink configurations. This extraction maintains the minimum necessary reliability while dramatically reducing frame structure complexity.
3Reliability
If features such as self-containment and ACK/NACK feedback are included in the frame structure, then communication robustness is improved, but processing requirements at AIoT devices increase
Solution Approach 1:
The patent removes self-containment requirements and ACK/NACK feedback mechanisms from the frame structure, as these features are unnecessary for AIoT backscattering communication where the base station controls the entire communication process. This extraction significantly reduces processing requirements at the AIoT devices.
4Use of energy by moving object
If a frame structure optimized for battery-free devices with energizing signals is implemented, then power consumption is reduced, but compatibility with existing sidelink standards decreases
Solution Approach 1:
The patent extracts the essential elements from existing sidelink standards that are applicable to AIoT devices while removing incompatible features. This creates a simplified frame structure that maintains power efficiency for battery-free operation while retaining sufficient compatibility with existing communication infrastructure.
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
The proposed frame structure reduces power consumption, simplifies processing requirements, and enables efficient communication for large numbers of ambient IoT devices with limited capabilities, facilitating energy harvesting and backscattering.
Implementation Method 1
battery-less IoT devices may need the presence of an energizing signal, since IoT devices may be reliant on back scattering for communications
Implementation Method 2
devices can either rely on back scattering or device generated signals to communicate with the reader
Data Source
AI summary
A system and a method are disclosed for ambient Internet of Things (A-IoT) systems. The system and method include transmitting a carrier wave to an ambient Internet of Things (IoT) device, transmitting a control signal and a payload signal to the A-IoT device, and receiving a back scattering signal from the A-IoT device after a time delay. The time delay is between the transmitting of the control signal and the receiving of the back scattering signal.