Backscatter Positioning via Dual-Channel Signal Separation
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Solution Overview
Problem
Current wireless communication systems face challenges in managing interference and network congestion, particularly with the integration of low-power RFID tag devices, which pose technical complexities due to their limited capabilities and power constraints, affecting network performance and resource utilization.
Innovation Solution
The implementation of backscatter-based positioning techniques, where a data signal is transmitted on a first channel and a backscatter signal is received on a second channel, allowing for simultaneous communication and positioning operations, reducing signaling overhead and conserving resources by using existing telecommunication data signals instead of dedicated positioning signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated positioning signals are used for positioning operations, then positioning accuracy is improved, but signaling overhead and resource consumption increase
Solution Approach 1:
The patent makes existing telecommunication data signals serve dual purposes: both communication and positioning. The data signals transmitted for normal communication operations are simultaneously used for positioning by being backscattered by RFID tags, eliminating the need for separate dedicated positioning signals and reducing signaling overhead while maintaining positioning functionality
Solution Approach 2:
The patent combines communication operations and positioning operations into a single integrated process. By using the same data signals for both communication and positioning purposes, and having RFID tags backscatter these signals, the system merges two previously separate functions into one unified operation, reducing resource consumption and overhead
2Adaptability or versatility
If RFID tag devices are integrated into wireless communication systems, then identification and tracking capabilities are improved, but network congestion and interference increase due to limited tag capabilities
Solution Approach 1:
The patent uses backscattered signals as an intermediary mechanism between RFID tags and the wireless communication system. Instead of requiring complex bidirectional communication between tags and the network, the system uses the backscattered data signals as a simple mediator that carries positioning information back to receivers, simplifying network management while maintaining identification and tracking capabilities
Solution Approach 2:
The RFID tags perform self-service by automatically backscattering the received data signals without requiring active transmission or complex processing. This passive self-service approach allows tags with limited capabilities to participate in positioning operations without adding significant network complexity or congestion
3Productivity
If separate channels are used for data signal and backscatter signal, then communication and positioning operations can proceed simultaneously, but channel resource allocation becomes more complex
Solution Approach 1:
The patent segments the communication and positioning operations into separate channels: data signals are transmitted on one channel while backscattered signals are received on another channel. This segmentation allows simultaneous operation of communication and positioning functions without interference, while the channel separation is managed through straightforward frequency or time division methods
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
This approach enhances positioning accuracy and efficiency while reducing computational, power, and communication resource allocation, thereby improving network performance and resource utilization in wireless communication systems.
Implementation Method 1
receiving, from a tag device, a backscatter signal based on the data signal received by the tag device via the first channel
Data Source
AI summary
This disclosure provides systems, methods, and devices for wireless communication that support backscatter based positioning. In a first aspect, a method of wireless communication includes receiving, from a transmit network entity, a data signal via a first channel. The method also includes receiving, from a tag device, a backscatter signal based on the data signal received by the tag device via the first channel. The backscatter signal is received via a second channel that is different from the first channel. The method further includes transmitting a report that indicates a position measurement associated with a position of the tag device. The position measurement is determined based on the received data signal and the received backscatter signal. Other aspects and features are also claimed and described.