Investigation on Secondary Memory Management in Wireless Sensor Network
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Abstract
This paper presents a survey on Importance of Secondary Memory management in Wireless Sensor Network (WSN) Operating Systems (OSs) .Sensor nodes may also have a storage unit or debugging unit. The storage unit is an external memory device that works as a secondary memory, keeping a data log from an energy perspective. In recent years, WSNs have received tremendous attention in the research community, with applications in battlefields, industrial process monitoring, home automation, and environmental monitoring. A WSN is a huge dynamic network in this aspect a severe environmental circumstances and low power of battery nodes might be die. Furthermore, a WSN is composed of limited memory and computational abilities. WSNs invariably operate in an unattended mode and in many scenarios it is impossible to replace sensor nodes after deployment, therefore a fundamental objective is to optimize the sensor nodes life time. These characteristics of WSNs impose additional challenges on OS design for WSN, and consequently, OS design for WSN deviates from traditional OS design. The purpose of this survey is to highlight major concerns pertaining to OS design in WSNs and to point out strengths and weaknesses of contemporary OSs for WSNs, keeping in mind the requirements of emerging WSN applications.
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