Sensor Device Dynamic Transmission Routine for Power-Freshness Trade-off
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Solution Overview
Problem
Sensor devices in IoT systems face challenges in reducing power consumption while maintaining data freshness, especially when installed in hard-to-reach locations, as they require frequent battery replacements and struggle to balance power-saving intermittent operations with the need for timely data transmission.
Innovation Solution
A sensor device with a processing routine table that allows for immediate or delayed data transmission based on trigger information, using a buffer and timer queue to manage data transmission, enabling flexible communication frequency and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the sensor device frequently transmits measurement processing results wirelessly, then the freshness of measurement data is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the transmission interval configurable and adjustable based on processing type. The control unit determines transmission intervals dynamically according to the type of measurement processing, allowing the system to adapt transmission frequency to specific needs rather than using a fixed interval, thus balancing data freshness with power consumption.
Solution Approach 2:
The patent changes the parameter of transmission interval based on processing type. Different measurement processing types (e.g., vibration detection, temperature monitoring) have different criticality levels, and the system adjusts the transmission interval parameter accordingly - shorter intervals for critical measurements and longer intervals for less critical ones, optimizing the balance between data freshness and power consumption.
2Use of energy by moving object
If the sensor device uses intermittent operation to reduce power consumption, then power consumption is reduced, but the response time for data transmission increases
Solution Approach 1:
The system dynamically adjusts the sleep period and transmission timing based on the type of measurement processing. For high-priority processing types, the system can wake up more frequently or prioritize transmission, while for low-priority types, longer sleep periods are maintained. This dynamic adjustment optimizes both power consumption and response time according to actual needs.
Solution Approach 2:
The control unit uses feedback from the processing type determination to adjust transmission behavior. By analyzing what type of measurement is being performed, the system feedback-adjusts the transmission interval and timing, ensuring that critical data is transmitted promptly while non-critical data can wait, thus balancing power savings with timely response.
3Use of energy by moving object
If fixed transmission interval is used, then power consumption is reduced, but the ability to meet varying freshness requirements for different processing types is reduced
Solution Approach 1:
The patent implements parameter changes by adjusting the transmission interval parameter according to the type of measurement processing. The control unit identifies the processing type and sets appropriate transmission intervals - for example, shorter intervals for vibration detection which may indicate urgent conditions, and longer intervals for stable temperature monitoring. This makes the system adaptable to different freshness requirements while maintaining power efficiency.
Solution Approach 2:
The system transitions from a static fixed interval approach to a dynamic adaptive approach where the transmission interval is determined by the control unit based on processing type. This dynamic behavior allows the system to optimize both power consumption and data freshness for each specific measurement scenario.
Data Source
AI summary
A processor of a sensor device performs measurement processing by one or a plurality of sensors and transmission processing of sensor data generated by the measurement processing. The sensor device includes a processing routine table that stores a processing routine configured to include, corresponding to an identifier for identifying processing performed by a processor, a type of the processing, an execution trigger of the processing, and trigger information that prescribes a trigger for transmitting the sensor data. The processor controls processing in a processing routine of the processing routine table, based on trigger information, so that the sensor data subjected to measurement processing is immediately transmitted, or temporarily stored in a buffer and transmitted after a predetermined time.