Presence-Aware Message Sending for Unauthorized Entry Detection

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Solution Overview

Problem

Existing methods for sending prompt messages when a door or window is opened during a user's absence are inaccurate due to reliance on preset absent time periods, which may not align with the user's actual departure time, potentially leading to unauthorized entries going undetected.

Innovation Solution

A method and device that detect whether a user is located in a target place by receiving messages from devices within the place or carried by the user, and if the user is not present, check if the entrance is open, sending a prompt message to the user's device if it is.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If preset absent time periods are used to determine user absence, then the system can operate automatically, but the detection accuracy of unauthorized entries deteriorates

Engineering Contradiction:

Improveautomatic operationVSAvoiddetection accuracy

Core Design Contradiction:

Extent of automationVSMeasurement precision

Solution Approach 1:

The system uses real-time location information feedback from the user's terminal device to dynamically determine absence status. The server continuously receives location updates and compares them with the target location to accurately determine whether the user is absent, replacing the static preset time period approach with dynamic feedback-based detection.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces the mechanical/time-based preset absent period system with an information-based real-time location detection system. Instead of relying on predetermined time intervals, the system uses location information from terminal devices to dynamically and accurately determine user absence status.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If real-time location detection is implemented, then detection accuracy improves, but system complexity increases

Engineering Contradiction:

Improvedetection accuracyVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent introduces a server as an intermediary that manages the complex processing of location information. The server receives location data from terminal devices, determines user presence/absence status, and controls the sensor device accordingly. This intermediary approach centralizes the complexity in a dedicated component rather than distributing it throughout the entire system.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The terminal device serves multiple functions: it acts as the user's portable device for normal communication and simultaneously functions as a location transmitter for security detection purposes. This multi-functionality reduces the need for separate dedicated detection devices, thereby limiting the increase in system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10134249B2Method and device for sending message

Publication Date: 2018.11.20 XIAOMI INC

AI summary

A method for sending a message is provided. The method includes: detecting whether a user is located in a target place; if the user is not located in the target place, detecting whether an entrance of the target place is opened; and if the entrance of the target place is opened, sending a prompt message to a device carried by the user.