Terminal Motion Notification via Mobility Phase Detection
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Solution Overview
Problem
In IoT applications, devices equipped with sensors to transmit data to wireless communication systems face challenges with high electrical consumption and limited throughput due to frequent sensor usage and data transmission, particularly for battery-operated objects and mobile devices.
Innovation Solution
A method where a terminal evaluates motion detection criteria using a motion sensor to identify mobility phases, optimizing sensor usage by storing and transmitting only start and end times of these phases, reducing data transmission and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are used frequently to transmit measurements, then the information accuracy and completeness is improved, but the electrical power consumption increases significantly
Solution Approach 1:
The motion sensor operates periodically rather than continuously, activating at scheduled intervals to evaluate motion detection criteria and transition between active and sleep states. This periodic operation reduces power consumption while maintaining measurement accuracy by capturing motion events at appropriate intervals.
Solution Approach 2:
The system changes the operational parameters of the motion sensor based on detected motion states. When motion is detected, the sensor increases its activity level to capture detailed measurements; when no motion is present, it reduces activity to save power, dynamically adjusting its operational characteristics.
2Reliability
If motion sensor is activated continuously to ensure accurate motion detection, then the measurement reliability is improved, but the energy consumption increases
Solution Approach 1:
The motion sensor alternates between active measurement periods and sleep periods, activating periodically to evaluate motion detection criteria. This periodic operation maintains detection reliability by ensuring the sensor is active when motion events are likely to occur, while reducing energy consumption during periods of no activity.
Solution Approach 2:
The sensor's operational state is dynamically adjusted based on detected motion conditions. The system transitions the sensor between active and sleep states according to motion detection results, optimizing the balance between reliable detection and energy efficiency by adapting sensor behavior to actual usage requirements.
3Loss of information
If all sensor measurements are transmitted to the access network, then the data completeness is improved, but the data transmission volume and network load increase
Solution Approach 1:
The system extracts and transmits only the essential motion detection information (motion events and relevant measurements) to the access network, filtering out redundant data. This selective transmission maintains data completeness for motion-related information while significantly reducing overall data transmission volume and network load.
Solution Approach 2:
Instead of transmitting all sensor measurements, the system transmits a partial set of measurements that are most relevant to motion detection and user needs. This partial transmission approach maintains sufficient information completeness for the intended application while reducing data volume.
4Loss of time
If transmission frequency is increased to provide real-time information, then the information freshness is improved, but the battery life of portable devices decreases
Solution Approach 1:
The terminal performs motion detection and transmits information periodically rather than continuously in real-time. The periodic transmission schedule balances information freshness by providing updates at regular intervals while preserving battery life by avoiding constant transmission operations, especially during periods when the terminal is stationary.
Solution Approach 2:
The transmission frequency is dynamically adjusted based on the terminal's motion state. When motion is detected, transmission frequency increases to provide timely information updates; when stationary, transmission frequency decreases to conserve battery power, optimizing the balance between information freshness and energy consumption.
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 minimizes electrical consumption and data transmission while ensuring relevant sensor measurements, making it suitable for low-power, low-complexity wireless communication systems with limited throughput.
Implementation Method 1
Said terminal comprising a motion sensor adapted to provide measurements representative of the movement of said terminal
Data Source
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AI summary
The present invention relates to a method (50) of notification, by a terminal (20), of information determined by said terminal, the method comprising: - an evaluation (51), as a function of measurements provided by a motion sensor (22), of a predetermined criterion for motion detection and, when the motion detection criterion is satisfied: a time-stamping (52) of the motion detected by storing an instant of detection of the detected motion, - a determination (53), as a function of the instants of detection, of respective instants of start and of instants of end of mobility phases of the terminal (20), - a determination (54) of information by the terminal (20) as a function of the respective instants of start and of the instants of end of mobility phases of said terminal, - a formation (55) of a notification message comprising the information determined, - a sending (56) of the notification message.