Wireless Movement Detection Using Periodic Scanning

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Solution Overview

Problem

Existing devices that use short or middle range connectivity to detect movement and alert users of unwanted separation often drain battery quickly and require constant activation, which is inefficient and may not be visible by default.

Innovation Solution

A method where short or middle range capabilities are activated only when needed, with a user device responding to a message from a property device via a wireless wide range connection, and subsequent scans are initiated only if the property device is out of range, reducing battery consumption and ensuring alerts are triggered efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If short or middle range connectivity capabilities are constantly kept active to detect device separation, then detection reliability is improved, but battery consumption increases

Engineering Contradiction:

Improvedetection reliabilityVSAvoidbattery consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system uses periodic scanning instead of continuous connectivity monitoring. The property device initiates scanning at intervals to detect the user device, and the user device responds only when scanned. This periodic action maintains detection capability while significantly reducing battery consumption compared to constant connectivity.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system dynamically adjusts the state of connectivity capabilities. The user device activates short or middle range capabilities only in response to being scanned by the property device, rather than maintaining them constantly active. This dynamic activation pattern reduces energy usage while preserving detection reliability.

Inventive Principle:

Principle #15Dynamics

2Measurement precision

If short or middle range connectivity is used for movement detection, then detection precision is improved, but device visibility and operability worsen

Engineering Contradiction:

Improvedetection precisionVSAvoiddevice visibility

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

Instead of requiring the user device to be constantly visible and initiatively connected, the system inverts the approach: the property device becomes the active scanner, and the user device responds only when scanned. This inversion maintains precise detection capability while eliminating the need for constant user device visibility or user action.

Inventive Principle:

Principle #13The other way round (Inversion)

3Reliability

If multiple scanning processes are initiated to verify device presence, then detection reliability is improved, but loss of time increases

Engineering Contradiction:

Improvedetection reliabilityVSAvoiddetection time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs preliminary verification by having the user device respond to a scan with status information about its connectivity capabilities. This preliminary action allows the property device to make informed decisions about whether additional scanning is necessary, reducing overall detection time while maintaining reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The user device provides feedback about its connectivity capability status in response to being scanned. This feedback mechanism allows the property device to adjust its scanning behavior, initiating additional scans only when necessary based on the received feedback, thereby reducing unnecessary time loss while maintaining detection reliability.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP2795803B1Methods, user equipment, property device, and computer program products for detecting movement of the property device and of indicating such movement at the user device

Publication Date: 2017.07.05 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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Figure 3a

AI summary

Methods, a user equipment, a server host, a client application, computer program products, and a server computer program. Short or middle range capabilities are activated at a user device, in case such capabilities are not already active, in response to receiving a first message initiated at the property device via a wireless wide range connection, and a response message, indicating that the short or middle range capabilities of the user device are active, is transmitted to the property device, via a wireless wide range connection. In response to receiving a second message initiated at the property device and indicating a failed scanning for the user device by the property device via a wireless wide range connection, an alarm indicating movement of the property device and that the property device is located out of range for the short or middle range capabilities of the user device is activated at the user device. At the property device, either one or two failed scanning processes triggers the property device to initiate alarm activation at the user device