This paper presents a novel multihop range-free localization algorithm tailored for anisotropic network. To mitigate the effect of network anisotropy, an approximate location area for each normal node is determined by using geographic information obtained from anchors at known locations. Using the approximate location area, a new distance estimation approach that is able to obtain the maximum estimation error is then introduced. The location of each normal node is computed with weighted least square estimation (WLSE) by taking into account the maximum distance estimation errors. The superiority of the proposed algorithm is validated over existing algorithms through extensive simulations.
ACKNOWLEDGMENT This work was supported by the National Research Foundation (NRF) of South Korea funded by the Minister of Education, Science and Technology (under Grant 2017R1D1A1B03035229).
