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This paper presents a cross-platform solution of smartphone-based mobile sink for wireless sensor networks, named uSink. With a cross-platform SD card, named uSD card, any smartphone with SD interface can be empowered with the capability to communicate with wireless sensor nodes. Furthermore, a middleware on mobile phone, named uSinkWare, is also designed to provide a typical mobile sink's functionalities,...
Sensors are now attached to a lot of mobile objects such as animals and vehicles to collect data. This forms intermittently connected mobile sensor network due to weak communication power and nodal mobility, in which conventional routing protocols in wireless sensor network don't work. In this paper, we propose a data harvesting scheme for intermittently connected mobile sensor network. This approach...
In wireless sensor networks (WSNs), QoS topology control achieves energy-efficiency by turning off redundant nodes and links, while still satisfying the given QoS requirement. However, existing topology control algorithms assume that links are either connected or disconnected. Recent experiments have shown that, besides the connected and disconnected region, a large percentage of links reside in the...
In mobile sensor networks, the mobility of nodes leads to frequent changes of network topology, therefore the communication links between source nodes and sink vary dynamically. The receiver based routing protocols do not need to establish global routing between source nodes and sink, but allow the neighbor nodes of the sender to contend for the forwarding right under certain rules, and only the contention...
In this paper, a cooperative wireless multi-hop network is considered, cooperative diversity can be realized by allowing nodes close proximity to cooperate in transmission. In order to group receiver nodes into a cluster, it is necessary to select appropriate nodes. We introduce an optimal node selection algorithm based on MIMO antenna selection, this algorithm, combining with cooperative transmission...
Topology control plays a critical role in the design of wireless ad hoc and sensor networks. It can assign reduced transmit powers to nodes so as to create reduced topologies with certain desired properties. In this paper, we design an energy-efficient localized topology control algorithm. The design objective is to prolong the operational time of networks resulted by the implementation of localized...
Clustering approach is one of the most used routing methodologies for wireless sensor network. However, most of the clustering practices make use of greedy cluster head formation process, wherein each node broadcasts its interest in becoming cluster head which is both energy and network intensive. In this paper we present a mechanism for efficient clustering formation, wherein an optimal number of...
Sensor networks have emerged as a promising technology with various applications, where power efficiency is one of the critical requirements. The recent IEEE 802.15.4 standard offers a promising platform for wireless sensor networks. Since each node can act as a coordinator or a device in the IEEE 802.15.4 standard, 802.15.4-based sensor networks have various possible network topologies. To reduce...
Sensor networks have emerged as a promising technology with various applications, and power consumption is one of the key issues. Since each full function device can act as a coordinator or a device in IEEE 802.15.4 standard, 802.15.4-based sensor networks have various possible network topologies. In this paper, we try to construct network topologies with small number of coordinators while still maintaining...
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