Understanding Node Localizability of Wireless Ad-hoc Networks

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Understanding Node Localizability of Wireless Ad-hoc Networks
— Location awareness is highly critical for wireless ad-hoc and sensor networks. Many efforts have been made to solve the problem of whether or not a network can be localized. Nevertheless, based on the data collected from a working sensor network, it is observed that the network is NOT always entirely localizable. Theoretical analyses also suggest that, in most cases, it is unlikely that all nodes in a network are localizable, although a (large) portion of the nodes can be uniquely located. Existing studies merely examine whether or not a network is localizable as a whole; yet two fundamental questions remain unaddressed: First, given a network configuration, whether or not a specific node is localizable? Second, how many nodes in a network can be located and which are them? In this study, we analyze the limitation of previous works and propose a novel concept of node localizability. By deriving the necessary and sufficient conditions for node localizability, for the first time, it ...
Zheng Yang, Yunhao Liu
Added 28 Jan 2011
Updated 28 Jan 2011
Type Journal
Year 2010
Authors Zheng Yang, Yunhao Liu
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