Abstract
“Environmental Sensor Networks (ESNs)” are a subset of sensor networks which are specifically tuned to an environmental application. During the last decade, for many applications the aim is to move towards Wireless Sensor Networks (WSNs), as cables are often impractical, obtrusive and can disturb the environment being monitored. Hart et al. reviewed over 50 representative examples of ESNs before 2006. However, in the recent years, there have been some new trends in ESNs. Thus in this paper, the goal is to present a comprehensive review of the recent literatures of ESNs since 2006. Following a top-down approach, we give an overview of various aspects of ESNs, and then review the literatures on several typical applications of ESNs. Finally, we draw our conclusions and propose the future directions of ESNs.
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