The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Dynamic fine-grained localization in Ad-Hoc networks of sensors
Proceedings of the 7th annual international conference on Mobile computing and networking
Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
Range-free localization schemes for large scale sensor networks
Proceedings of the 9th annual international conference on Mobile computing and networking
Efficient Single-Anchor Localization in Sensor Networks
DSSNS '06 Proceedings of the Second IEEE Workshop on Dependability and Security in Sensor Networks and Systems
The Lighthouse Location System for Smart Dust
Proceedings of the 1st international conference on Mobile systems, applications and services
BeepBeep: a high accuracy acoustic ranging system using COTS mobile devices
Proceedings of the 5th international conference on Embedded networked sensor systems
HexNet: Hexagon-based localization technique for wireless sensor networks
PERCOM '09 Proceedings of the 2009 IEEE International Conference on Pervasive Computing and Communications
Organizing a global coordinate system from local information on an ad hoc sensor network
IPSN'03 Proceedings of the 2nd international conference on Information processing in sensor networks
Cut-and-sew: a distributed autonomous localization algorithm for 3D surface wireless sensor networks
Proceedings of the fourteenth ACM international symposium on Mobile ad hoc networking and computing
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Several range-free and range-based techniques have been proposed to solve the localization problem in wireless adhoc and sensor networks. Although range-based techniques are known to be more accurate than their range-free counterparts, they usually require nodes to be equipped with sophisticated hardware that makes these techniques inappropriate, especially under massive deployments, for the presumably inexpensive sensor nodes. From hardware prospective, it is much easier to obtain received signal strength(RSS) than to obtain angle of arrival(AOA) or time difference of arrival(TDOA). Hence, localization techniques based on RSS are undoubtedly the most acceptable in the literature. A major drawback with RSSI-based distance measurements is the inherent inaccuracy due to the irregularity of signal propagation in different directions. In this paper, we propose and evaluate, a new localization protocol for sensor networks where each sensor is localized based on its angle to at least two of the network anchors. Only angles are determined based on the relative strength of received signals and no distance measurements are needed which in turn reduces the impact of the irregularity of signal propagation on the localization accuracy. Although our protocol requires each sensor to be within the transmission range of only two anchors, it can be easily extended to benefit from the existence of all available anchors for a better localization accuracy. Simulation results under noise-free and noisy conditions show that our protocol achieves higher localization accuracy than other protocols which makes it useful for most WSN applications.