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Barrier coverage is a hot issue in wireless sensor networks for its various applications, such as border surveillance and intrusion detection. In wireless sensor networks, it is a very important problem that how to prolong the network life time. In this paper, we focus on the problem that how to prolong the network lifetime for barrier coverage application. Firstly, the surveillance region is divided...
In energy constrained wireless sensor networks, node scheduling is an effective approach to improving the energy efficiency and prolonging the network lifetime. In this paper, we propose a distributed, lightweight, and location-unaware scheduling scheme for randomly deployed wireless sensor networks. The basic idea of the scheduling scheme is to organize sensor nodes into disjoint node sets, which...
To achieve scalability, a few resource-rich heterogeneous nodes are scattered in a wireless sensor network consisting of a large number of energy-constrained sensor nodes. Heterogeneous nodes are equipped with powerful radio transceiver and their main task is to organize a backbone communication network and to relay data to the sink. For the scenario, this paper proposes a coverage problem which maintaining...
Most of previous works on coverage problem are based on omni-directional sensing model. Due to different sensing capability in different direction, directional sensor networks require new solutions. We present two direction optimizing algorithms: greedy direction adjusting (GDA) algorithm and equitable direction optimizing (EDO) algorithm. GDA algorithm optimizes direction merely according to the...
A small world phenomenon has been discovered in a wide range of disciplines, such as physics, biology, social science, information system, computer networks, etc. In a wireless network, the small world phenomenon is used in the development of novel routing strategies. However, past studies made use of wire lines as shortcuts to construct a small world in a wireless network. First, it's difficult to...
This paper proposes a simple and scalable approach to multisink routing scheme in wireless sensor networks. Wireless sensor network is a rapidly growing discipline, with new technologies emerging and new applications under development. In addition to providing light and temperature measurements, wireless sensor nodes have applications such as security surveillance, environmental monitoring, and wildlife...
This paper proposes a simple and scalable approach to multisink routing scheme in wireless sensor networks. Wireless sensor network is a rapidly growing discipline, with new technologies emerging and new applications under development. In addition to providing light and temperature measurements, wireless sensor nodes have applications such as security surveillance, environmental monitoring, and wildlife...
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