ESL Self-Positioning Through Inter-Label RF Links
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Solution Overview
Problem
The deployment of electronic shelf label (ESL) devices in retail environments is labor-intensive and prone to positioning errors, leading to inefficiencies and environmental waste due to paper label replacements, and manual intervention is required for accurate device placement.
Innovation Solution
An iterative self-positioning process using radio frequency measurements from known anchor ESL devices to refine the position of unknown target ESL devices, reducing manual labor and communication overhead through geometric dilution of precision and signal-to-noise ratio improvements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ESL devices are deployed manually across retail environments, then positioning accuracy can be achieved, but deployment labor intensity and time consumption increase significantly
Solution Approach 1:
The patent implements self-positioning functionality where ESL devices automatically determine their own locations using RF measurements and iterative algorithms. Each ESL device acts as both a transmitter and receiver, collecting RF measurements from neighboring devices and computing its position through geometric calculations without requiring manual intervention for positioning, thereby resolving the contradiction between positioning accuracy and deployment efficiency
Solution Approach 2:
The patent replaces the mechanical manual positioning process with an automated RF-based measurement and calculation system. Instead of physically placing and marking device positions, the system uses radio frequency signal measurements and iterative geometric algorithms to automatically compute positions, eliminating labor-intensive manual operations while maintaining positioning accuracy
2Measurement precision
If ESL devices are individually positioned manually, then positioning accuracy improves, but deployment time and communication overhead increase
Solution Approach 1:
The patent merges the positioning operations of multiple ESL devices into a simultaneous iterative process. All devices collect RF measurements and update their position estimates concurrently through multiple iterations, rather than positioning devices sequentially. This parallel processing approach reduces total deployment time while maintaining accuracy through the iterative refinement of position estimates based on accumulated RF measurements
3Ease of manufacture
If paper labels are used for product information display, then initial setup is simple, but ongoing maintenance requires continuous paper replacement and labor
Solution Approach 1:
The ESL devices automatically update their displayed information by receiving data wirelessly from a central system or handheld devices. The electronic labels self-refresh their content without requiring manual paper replacement, eliminating ongoing maintenance labor while maintaining the simplicity of information updates through electronic programming
Solution Approach 2:
The patent replaces the mechanical paper label system with an electronic display system that uses wireless communication for information updates. Instead of physically printing and attaching new paper labels, the system transmits information electronically to ESL devices, which then display the updated content, eliminating the need for continuous paper handling and attachment operations
4Adaptability or versatility
If ESL devices are relocated after deployment, then adaptability to changing retail layouts is achieved, but positioning accuracy deteriorates due to initial positioning errors
Solution Approach 1:
The patent implements dynamic re-positioning capability where ESL devices can update their position estimates after relocation. When devices are moved to new locations, the system performs additional iterative positioning cycles using new RF measurements from the relocated configuration, allowing the network to adapt to changed layouts while recovering positioning accuracy through the iterative refinement process
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 accurate positioning of ESL devices within indoor environments with minimal user intervention, reducing deployment costs and environmental impact by allowing reusable electronic labels.
Implementation Method 1
The devices or nodes of an ESL system may be equipped with Bluetooth Low Energy (BLE) radios that can be used to track the location of a BLE-enabled device
Implementation Method 2
A positioning error associated with the estimated position may be determined based on geometric dilution of precision (GDOP) values and/or an uncertainty or confidence metric associated with the positioning measurements (e.g., a signal-to-noise ratio (SNR) or other quality metric associated with the measured signals)
Data Source
AI summary
This disclosure provides systems, methods, and devices for Electronic Shelf Label (ESL) systems that support positioning of ESL devices. In a first aspect, a method includes: determining known positions of a first subset of ESL devices; receiving positioning measurements for each ESL device in a second subset of ESL devices; estimating a first position of each ESL device in the second subset based on the positioning measurements received for that ESL device and the known positions of the first subset; determining a positioning error associated with the first position of each ESL device in the second subset; and estimating a second position of each ESL device in the second subset based on the positioning error and additional positioning measurements received for that ESL device. Other aspects and features are also claimed and described.