title: Event Coverage Detection and Event Source Determination in Underwater Wireless Sensor Networks.
abstract: With the advent of the Internet of Underwater Things, smart things are deployed in the ocean space and establish underwater wireless sensor networks for the monitoring of vast and dynamic underwater environments. When events are found to have possibly occurred, accurate event coverage should be detected, and potential event sources should be determined for the enactment of prompt and proper responses. To address this challenge, a technique that detects event coverage and determines event sources is developed in this article. Specifically, the occurrence of possible events corresponds to a set of neighboring sensor nodes whose sensory data may deviate from a normal sensing range in a collective fashion. An appropriate sensor node is selected as the relay node for gathering and routing sensory data to sink node(s). When sensory data are collected at sink node(s), the event coverage is detected and represented as a weighted graph, where the vertices in this graph correspond to sensor nodes and the weight specified upon the edges reflects the extent of sensory data deviating from a normal sensing range. Event sources are determined, which correspond to the barycenters in this graph. The results of the experiments show that our technique is more energy efficient, especially when the network topology is relatively steady.
authors.affiliation: School of Computer &amp; Communication Engineering, University of Science &amp; Technology Beijing, Beijing 100083, China. zhangbing.zhou@gmail.com.|School of Information Engineering, China University of Geosciences (Beijing), Beijing 100083, China. zhangbing.zhou@gmail.com.|Computer Science Department, TELECOM SudParis, Evry 91 011, France. zhangbing.zhou@gmail.com.
authors.forename: Zhangbing
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: School of Information Engineering, China University of Geosciences (Beijing), Beijing 100083, China. riliangxing@126.com.
authors.forename: Riliang
authors.initials: R
authors.lastname: Xing
authors.affiliation: College of Information Science and Technology, Hainan University, Haikou 570228, China. duanyucong@hainu.edu.cn.
authors.forename: Yucong
authors.initials: Y
authors.lastname: Duan
authors.affiliation: Development Research Center of China Geological Survey, and Key Laboratory of Geological Information Technology, Ministry of Land and Resources, Beijing 100037, China. yueqinzhu@163.com.
authors.forename: Yueqin
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: School of Information Engineering, China University of Geosciences (Beijing), Beijing 100083, China. xiangjianmingzerg@gmail.com.
authors.forename: Jianming
authors.initials: J
authors.lastname: Xiang
keywords: event coverage detection; event sources determination; routing tree; underwater wireless sensor networks; weighted graph