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Wireless sensor networks have recently come into prominence because they hold the potential to revolutionize many segments of the economy and life, from environmental monitoring and conservation, to manufacturing and business asset management, to automation in the transportation and health-care industries. Information collected by and transmitted on a sensor network describes conditions of physical environments for example, temperature, humidity, or vibration and requires advanced query interfaces and search engines to effectively support user-level functions. Wireless sensor nodes can be deployed in various regions to collect the information but they have limitations like Limited power they can harvest, ability to cope with node failures (node failure problem), mobility of nodes, communication failures, heterogeneity of nodes, large scale of deployment and Load balancing problem.
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