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A Sigfox Energy Consumption Model.

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This study models Sigfox (a Low-Power Wide Area Network) device energy consumption. Results show battery life depends on data rate, with lower rates significantly extending device lifetime.

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Area of Science:

  • Wireless Communication Technologies
  • Internet of Things (IoT) Energy Efficiency
  • Low-Power Wide Area Networks (LPWAN)

Background:

  • Sigfox is a prominent Low-Power Wide Area Network (LPWAN) technology gaining significant industry and academic interest.
  • Energy efficiency is critical for Sigfox devices, such as sensors and actuators, which operate on limited power sources.
  • Existing research on Sigfox energy consumption is limited, highlighting a gap in understanding device longevity.

Purpose of the Study:

  • To develop an analytical model for characterizing Sigfox device current consumption and lifetime.
  • To quantify the energy cost associated with data delivery over the Sigfox network.
  • To analyze the impact of key Sigfox parameters, mechanisms, and frame losses on device energy performance.

Main Methods:

  • An analytical model was developed based on empirical measurements from a real Sigfox hardware module.
  • The model characterizes device current consumption, operational lifetime, and energy expenditure for data transmission.
  • Evaluation included quantifying the influence of Sigfox parameters, operational mechanisms, and data frame losses.

Main Results:

  • A Sigfox device with a 2400 mAh battery can achieve a theoretical lifetime of 1.5 years sending data every 10 minutes at 100 bit/s.
  • Increasing the data rate to 600 bit/s extends the theoretical lifetime to 2.5 years under the same transmission frequency.
  • Device lifetime asymptotically approaches 14.6 years as the message transmission rate is progressively reduced.

Conclusions:

  • The developed analytical model provides a realistic characterization of Sigfox device energy consumption and lifetime.
  • Data transmission rate is a critical factor influencing Sigfox device longevity, with lower rates yielding significantly longer operational periods.
  • The model enables informed design and deployment decisions for energy-constrained Sigfox applications.