Underwater Wireless Sensor Networks(UWSNs)are becoming increasingly popular in marine applications due to advances in wireless and microelectronics ***,UWSNs present challenges in processing,energy,and memory storage ...
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Underwater Wireless Sensor Networks(UWSNs)are becoming increasingly popular in marine applications due to advances in wireless and microelectronics ***,UWSNs present challenges in processing,energy,and memory storage due to the use of acoustic waves for communication,which results in long delays,significant power consumption,limited bandwidth,and packet *** paper provides a comprehensive review of the latest advancements in UWSNs,including essential services,common platforms,critical elements,and components such as localization algorithms,communication,synchronization,security,mobility,and *** significant progress,reliable and flexible solutions are needed to meet the evolving requirements of *** purpose of this paper is to provide a framework for future research in the field of UWSNs by examining recent advancements,establishing a standard platform and service criteria,using a taxonomy to determine critical elements,and emphasizing important unresolved issues.
Modern handheld devices provided with localization capabilities could be used to automatically create a diary of user's whereabouts, and use it as a complement of the user profile in many applications. In this pap...
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ISBN:
(纸本)9781595939845
Modern handheld devices provided with localization capabilities could be used to automatically create a diary of user's whereabouts, and use it as a complement of the user profile in many applications. In this paper we present the Whereabouts diary, an application/service to log the places visited by the user and to label them, in an automatic way, with descriptive semantic information. In particular, Web-retrieved data and the temporal patterns in which places are visited can be used to define such meaningful semantic labels. In this paper, we describe the general idea at the basis of our service and discuss our implementation and the associated experimental results. In addition, we illustrate an application that can fruitfully exploit the whereabouts diary as a supporting service, and discuss areas for future work.
Position estimation is a crucial aspect of localization in Wireless Sensor Networks (WSNs) as estimated sensor location is used in many applications of WSNs. Various localization algorithms have been developed over th...
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Position estimation is a crucial aspect of localization in Wireless Sensor Networks (WSNs) as estimated sensor location is used in many applications of WSNs. Various localization algorithms have been developed over the time for obtaining the highest precision in location estimation. The main idea in most of the popular algorithms is to estimate the position of sensors with help of some special beacon nodes with known coordinates. Favorable method that provides a better accuracy with lowest network cost is to replace all special beacons with a single beacon equipped with GPS unit. In this case, the fundamental problem is to design a trajectory that the mobile beacon should follow which minimizes the localization error. In this paper, we provide an up-to-date state-of-the-art of the most important anchor node trajectories designed to localize static sensors. We have evaluated the performance of the existing schemes through a series of simulations in MATLAB. Furthermore, we highlight some issues experienced by these techniques.
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