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Indoor target localization is an essential and fundamental issue for wireless sensor networks (WSN). However, it is rather difficult for WSN to maintain the localization accuracy in line-of-sight (LOS) and non-line-of-sight (NLOS) mixed environment. NLOS propagation always leads to larger ranging error than LOS does. When the target moves in the rooms and corridors, the signal transmission state will...
Energy-efficiency is a critical factor in designing clustering protocols of Wireless Sensor networks. In this paper, we propose an Energy-based Cluster-head Inheritance Algorithm (EICA), which adopts a novel kind of CH inheritance mechanism with each cluster based on an energy threshold to balance energy cost among the network. Simulation results show that ECIA algorithm performs much better than...
Obtaining long system lifetime as well as maintaining sufficient surveillance to targets is one of the most important challenges in the design of wireless sensor surveillance network. The effective lifetime of system is defined and then a hierarchical scheduling scheme is presented, in order to reduce the communication overhead and prolong the effective lifetime of system in differentiated surveillance...
In recent years, many clustering algorithms have been proposed. Among them, LEACH is the most famous one. However, in LEACH, within each 1/p rounds, once a node has been selected as a cluster-head (CH), its threshold will be set to 0, and thus it will lose the chance to participate cluster-head selection, even if it still has enough energy. In this paper, we present a novel cluster-head selection...
In many applications of wireless sensor networks, location is very important data. Location data can come from manual setting or GPS device. However, manual setting requires huge cost of human time, and GPS setting requires expensive device cost. Both approaches are not applicable to localization task of large scale wireless sensor networks. In this paper, we propose an accurate and efficient localization...
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