@article{(Open Science Index):https://publications.waset.org/pdf/10002217,
	  title     = {Range-Free Localization Schemes for Wireless Sensor Networks},
	  author    = {R. Khadim and  M. Erritali and  A. Maaden},
	  country	= {},
	  institution	= {},
	  abstract     = {Localization of nodes is one of the key issues of
Wireless Sensor Network (WSN) that gained a wide attention in
recent years. The existing localization techniques can be generally
categorized into two types: range-based and range-free. Compared
with rang-based schemes, the range-free schemes are more costeffective,
because no additional ranging devices are needed. As a
result, we focus our research on the range-free schemes. In this paper
we study three types of range-free location algorithms to compare the
localization error and energy consumption of each one. Centroid
algorithm requires a normal node has at least three neighbor anchors,
while DV-hop algorithm doesn’t have this requirement. The third
studied algorithm is the amorphous algorithm similar to DV-Hop
algorithm, and the idea is to calculate the hop distance between two
nodes instead of the linear distance between them. The simulation
results show that the localization accuracy of the amorphous
algorithm is higher than that of other algorithms and the energy
consumption does not increase too much.},
	    journal   = {International Journal of Computer and Information Engineering},
	  volume    = {9},
	  number    = {7},
	  year      = {2015},
	  pages     = {1723 - 1730},
	  ee        = {https://publications.waset.org/pdf/10002217},
	  url   	= {https://publications.waset.org/vol/103},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 103, 2015},