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Localization of sensor nodes is one of the key issues in wireless sensor networks. Next to the ability, to assign a phenomenon to a position, localization is a precondition for sensor network algorithms like geographic clustering and routing. A simple approach for coarse grained localization is centroid localization (CL), which was firstly presented by Bulusu et al. and assumes regularly arranged...
Wireless sensor actor networks are a new challenging type of network in which sensor and actor nodes must coordinate to achieve network goals. But in some situations actors cannot directly communicate with each other. The wide extent of environment, obstacles in the environment and bad communication conditions are some of the reasons. One solution is to exploit accessible sensor nodes to indirectly...
In wireless sensor networks, secure and efficient routing is very important. But its realization is difficult because of the limited resources of sensor nodes and the many routing factors. In order to realize secure routing, shorten the delay and prolong the life of the network simultaneously, we make two efforts in this paper. The first is building a trust model based on the ratio of packets delivery,...
In wireless sensor networks, balanced energy dissipation is crucial to achieving satisfactory network lifetime. Since all data packets usually have to be forwarded to the base station via multi-hop routing, the traffic pattern is highly non-uniform, putting a high burden on the sensor nodes close to the base station. This paper proposes novel centralized and distributed algorithms to efficiently balance...
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