Self-Adaptive Sampling Rate to Improve Network Lifetime using Watchdog Sensor and Context Recognition in Wireless Body Sensor Networks

Majlesi Journal of Electrical Engineering

مقاله 2، دوره 14، شماره 3، آذر 2020، صفحه 11-22   

نوع مقاله: Review Article

شناسه دیجیتال (DOI): 10.29252/mjee.14.3.2

نویسندگان

Hamid Mehdi^{* 1}؛ Houman Zarrabi²؛ Ahmad Khadem Zadeh³؛ AmirMasoud Rahmani³

¹Department of Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

²ICT Research Center, Tehran, Iran

³Computer engineering department, Science and Research Branch, Islamic Azad University, Tehran, Iran

چکیده

Todays, Wireless Body Sensor Networks (WBSNs) are used as a useful way in health monitoring. One of the most important problems regarding Wireless Body Sensor Network (WBSNs) is network lifetime. This factor mainly relies on the energy consumption of sensors. In fact, during capturing vital sign data and also communicating them to the coordinator, the biosensors consume energy. In this article, we are interested to propose an energy efficient Adaptive Sampling (AS) rate specification algorithm to set the amount of sensed data. According to the National Early Warning Score (NEWS), the sensors gather data and detect emergency data.  Two scenarios have been used; the first is utilizing context recognition to indicate the active and sleep sensors in different time slices and the second is using watchdog sensors for checking patient situation in critical condition. Simulation results show that the proposed method can save energy and increase network lifetime by up to 4 times more than the previous work. In addition, our methods allow on average 75% improvement in overhead data reduction while maintaining more than 90% data integrity.

کلیدواژه‌ها

Wireless Body Sensor Network؛ News؛ Context؛ lifetime

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