Electronic Shelf Label Lost Communication Detection

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Solution Overview

Problem

Existing electronic shelf label (ESL) systems face difficulties in identifying which labels have lost communication, leading to incorrect information display due to inadvertent database entry removals, making it challenging to detect communication failures in large deployments.

Innovation Solution

Each ESL is programmed to execute a 'lost communication' action if no communication occurs within a predetermined time, which can include displaying a message, sounding a tone, or illuminating an LED, with the schedule for this action being periodically updated to prevent false triggers and ensure detection of actual communication loss.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If ESLs are deployed in large numbers without individual communication monitoring, then system coverage and information display capability are improved, but the ability to detect communication failures deteriorates

Engineering Contradiction:

Improvenumber of ESLs deployedVSAvoiddifficulty of identifying communication failures

Core Design Contradiction:

Quantity of substanceVSDifficulty of detecting and measuring

Solution Approach 1:

Each ESL is equipped with self-diagnostic capability through internal programming that automatically monitors communication status and executes lost communication actions when failures are detected, eliminating the need for external monitoring systems

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system implements feedback mechanisms where ESLs report their communication status back to the system, enabling automatic detection and identification of communication failures among deployed units

Inventive Principle:

Principle #23Feedback

2Measurement precision

If communication status monitoring is implemented continuously, then detection accuracy of communication failures is improved, but energy consumption and system complexity increase

Engineering Contradiction:

Improvedetection accuracy of communication failuresVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

Communication status monitoring is performed periodically at scheduled intervals rather than continuously, reducing system complexity and energy consumption while maintaining adequate detection accuracy

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

ESLs are pre-programmed with lost communication actions and monitoring logic during deployment, so that detection capability is built-in from the start without requiring complex ongoing configuration or external monitoring infrastructure

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS7382228B2Methods and apparatus for identifying electronic shelf labels with which communication has been lost

Publication Date: 2008.06.03 NCR VOYIX CORP

AI summary

Systems and techniques for calling attention to loss of communication with an electronic shelf label. One or more of a plurality of labels deployed in a location may be programmed with a message to be displayed or an action to be taken if communication is lost. The labels may be programmed with a scheduled action that will cause a label to take the programmed action or display the programmed message if communication with the label does not occur by a specified time. Communication with the label causes the action or event to be rescheduled.