Issue No. 03 - March (2012 vol. 23)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/TPDS.2011.154
Zhenhua Liu , Unversity of South Carolina, Columbia
Hongbo Liu , Stevens Institute of Technology, Hoboken
Wenyuan Xu , Unversity of South Carolina, Columbia
Yingying Chen , Stevens Institute of Technology, Hoboken
Jamming attacks are especially harmful when ensuring the dependability of wireless communication. Finding the position of a jammer will enable the network to actively exploit a wide range of defense strategies. In this paper, we focus on developing mechanisms to localize a jammer by exploiting neighbor changes. We first conduct jamming effect analysis to examine how the communication range alters with the jammer's location and transmission power using free-space model. Then, we show that a node's affected communication range can be estimated purely by examining its neighbor changes caused by jamming attacks and thus, we can perform the jammer location estimation by solving a least-squares (LSQ) problem that exploits the changes of communication range. Compared with our previous iterative-search-based virtual force algorithm, our LSQ-based algorithm exhibits lower computational cost (i.e., one step instead of iterative searches) and higher localization accuracy. Furthermore, we analyze the localization challenges in real systems by building the log-normal shadowing model empirically and devising an adaptive LSQ-based algorithm to address those challenges. The extensive evaluation shows that the adaptive LSQ-based algorithm can effectively estimate the location of the jammer even in a highly complex propagation environment.
Jamming, radio interference, least squares, localization.
W. Xu, H. Liu, Y. Chen and Z. Liu, "Exploiting Jamming-Caused Neighbor Changes for Jammer Localization," in IEEE Transactions on Parallel & Distributed Systems, vol. 23, no. , pp. 547-555, 2011.