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- W2411380684 abstract "A tree structure is often used in wireless sensor networks to deliver sensor data to a sink node. Such a tree can be built using directional antennas as they offer considerable advantage over the omni-directional ones. A tree is adequate for data gathering from all sensor nodes if no node fails. We study the problem of enhancing the fault tolerance of a data gathering tree by adding additional links so that failure of a sensor or a pair of adjacent sensors would not disconnect the tree. We prove that the least-cost tree augmentation problem is NP-complete and provide approximation algorithms one for single node failure and the other for a pair of adjacent node failure, with performance bounds of two and four respectively." @default.
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- W2411380684 date "2014-08-01" @default.
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- W2411380684 title "Fault-tolerant design of wireless sensor networks with directional antennas" @default.
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- W2411380684 doi "https://doi.org/10.1016/j.pmcj.2014.03.004" @default.
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