Wireless Sensor Networks ( Wsn )

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Introduction: From the past few years wireless sensor networks (WSN’s) have gained global attention. It is a promising technology that has been extensively used in various critical and long-lasting applications. A Wireless Sensor Network (WSN) has a large number of energy constrained sensor nodes that have the capability to compute and communicate. They are used to identify the events of interests and transfer the data to the sink node. WSN is categorized into fixed WSN and mobile WSN. Target area has fixed sensors for performing their roles in fixed WSN’s while there are moving sensors to perform sensing in the mobile WSN’s. The cost of building and maintenance depends on the sensor networks size, whether small-scale or large scale…show more content…
By dividing the WSN into fixed WSN and mobile WSN, it proposes a measure to identify and deal with the sensor node faults. Additionally, it suggested a mechanism for the prediction of the energy consumption of sensor networks. For making the networks energy efficient, there is a requirement of energy efficient protocols that works at each layer aside. So, in this paper, we propose an adaptive and cross-layer strategy in order to increase the network lifetime and minimize the energy consumption. This approach is certainly beneficial in minimizing the energy expenditure as it can exploit the knowledge that is present on the different layers of the protocol stack. Body: Fault Tolerance Scheme on WSN The most essential building element in a WSN is routing. Routing is the collection of sensor nodes information which is used for updating and communication among sensor nodes. WSN should take into consideration two basic steps. First is, fault detection that detects the fault in a particular functionality and the second is, fault recovery that take care of a faulty system. There are two types of fault detection methods: self-diagnosis and the other one is cooperative diagnosis. If a sensor node can determine faults by itself, it can adopt the self-diagnosis method. If a node does not get an acknowledgement from a neighboring node within a fixed interval of time then the sensor node possibly will identify that there are some link
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