Backscatter Wireless Signaling for Zero-Power Communication Range
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Solution Overview
Problem
Zero-power consumption devices face challenges in obtaining power and carrier signals for effective data transmission, limiting their communication distance and efficiency.
Innovation Solution
A wireless communication method where a first device transmits a predetermined signal to a second device for power harvesting and/or back scattering, ensuring a power supply and carrier requirement is met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If zero-power consumption devices use traditional power supply methods, then they can maintain basic operation, but their communication distance and transmission efficiency are limited
Solution Approach 1:
The patent replaces traditional mechanical power supply systems (batteries, power adapters) with electromagnetic field-based wireless power transfer. The first device generates electromagnetic signals that are harvested by the second device to power communication operations, eliminating the need for physical power sources and enabling extended communication distance without proportionally increasing power consumption.
Solution Approach 2:
The first device performs multiple functions simultaneously: it generates carrier signals for communication and provides wireless power transfer through the same electromagnetic channel. This multi-functionality allows the system to extend communication distance while managing power consumption efficiently, as the power and communication share the same transmission medium.
2Use of energy by moving object
If zero-power consumption devices harvest power from transmitted signals, then power supply requirement is met, but signal quality and communication reliability may deteriorate
Solution Approach 1:
The patent segments the electromagnetic signal into distinct functional components: power carrying signals transmitted by the first device and carrier signals used for backscattering communication by the second device. This segmentation allows the power harvesting and communication functions to operate independently without interfering with each other, maintaining signal quality and communication reliability while enabling efficient power harvesting.
Solution Approach 2:
The patent introduces a power carrying signal as an intermediary that facilitates power transfer without directly affecting the communication carrier signal. This intermediary signal enables the second device to harvest power while the first device maintains control over communication signal quality, ensuring communication reliability is not compromised by power harvesting activities.
3Reliability
If the first device transmits predetermined signals continuously, then power and carrier requirements are ensured, but energy waste and interference increase
Solution Approach 1:
The patent implements periodic transmission of power carrying signals by the first device rather than continuous transmission. The signals are transmitted in scheduled intervals that align with the second device's power harvesting and communication needs. This periodic action ensures stable power supply when needed while reducing energy waste and potential interference during periods when the second device is not actively harvesting or communicating.
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 effective power supply and carrier signal provision for zero-power consumption devices, enhancing their data transmission capabilities and expanding communication range.
Implementation Method 1
the first signal is used for the second device to perform power harvesting
Implementation Method 2
the first signal is used for the second device to perform back scattering
Data Source
Figure 1
Figure 2
Figure 3~6
AI summary
A wireless communication method and a device, the method includes: transmitting, by a second device, first request information to the first device, where the first request information is used for requesting the first device to transmit a target signal, and the target signal is used for the second device to perform power harvesting and/or for the second device to perform back scattering.