Backscatter Relay Communication for Zero-Power Range Extension
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Solution Overview
Problem
Zero-power-consumption terminals in communication systems face limited backscatter coverage distance, restricting their effectiveness in applications like logistics and supermarket management, where extended communication range is necessary.
Innovation Solution
Enhancing the backscatter coverage distance capability by optimizing receiver sensitivity, antenna gains, transmit power, location, and frequency shifting capabilities in communication devices, allowing for longer-range power harvesting and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If zero-power-consumption terminals use backscatter communication to achieve power-free operation, then power consumption is reduced to zero, but backscatter coverage distance is limited
Solution Approach 1:
The patent introduces a relay communication device as an intermediary between the first communication device and the second communication device. This relay device receives backscatter signals from the first device and forwards them to the second device, extending the coverage distance without requiring the first device to consume power for active transmission. The intermediary enables long-range communication while maintaining zero-power operation.
Solution Approach 2:
The system dynamically selects between direct backscatter communication and relay-assisted backscatter communication based on distance and signal conditions. When the second communication device is within direct backscatter range, communication occurs directly; when beyond range, the relay device is activated. This dynamic adaptation allows the system to maintain zero-power operation while extending effective coverage distance.
2Adaptability or versatility
If more zero-power-consumption terminals are deployed in logistics and supermarket scenarios, then application coverage is expanded, but backscatter communication effectiveness is reduced due to limited coverage distance
Solution Approach 1:
The patent segments the communication network into multiple zones using relay communication devices positioned at strategic locations. Each relay device creates an extended communication zone, allowing terminals to be deployed across larger areas. This segmentation enables widespread terminal deployment in logistics and supermarket scenarios while maintaining reliable backscatter communication within each zone through the relay 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 enhanced backscatter coverage distance capability extends the practical application deployment of zero-power-consumption terminals, overcoming the communication bottleneck and enabling more efficient data transmission over longer distances.
Implementation Method 1
transmitting, by a first communication device, a backscatter signal
Implementation Method 2
the first communication device obtains power through power harvesting for communication, information collection, and information processing
Data Source
AI summary
A method for wireless communication, in which a first communication device supports an enhanced backscatter coverage distance capability. The method for wireless communication includes: transmitting, by the first communication device, a backscatter signal; where the first communication device obtains power through power harvesting for communication, information collection and information processing, and the first communication device supports an enhanced backscatter coverage distance capability.