A scalable location service for geographic ad hoc routing
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Robust Positioning Algorithms for Distributed Ad-Hoc Wireless Sensor Networks
ATEC '02 Proceedings of the General Track of the annual conference on USENIX Annual Technical Conference
Range-free localization schemes for large scale sensor networks
Proceedings of the 9th annual international conference on Mobile computing and networking
Distributed localization in wireless sensor networks: a quantitative comparison
Computer Networks: The International Journal of Computer and Telecommunications Networking - Special issue: Wireless sensor networks
Error characteristics of ad hoc positioning systems (aps)
Proceedings of the 5th ACM international symposium on Mobile ad hoc networking and computing
An Analysis of Error Inducing Parameters in Multihop Sensor Node Localization
IEEE Transactions on Mobile Computing
A Sorted RSSI Quantization Based Algorithm for Sensor Network Localization
ICPADS '05 Proceedings of the 11th International Conference on Parallel and Distributed Systems - Volume 01
A robustness analysis of multi-hop ranging-based localization approximations
Proceedings of the 5th international conference on Information processing in sensor networks
Monitoring Civil Structures with a Wireless Sensor Network
IEEE Internet Computing
The effects of ranging noise on multihop localization: an empirical study
IPSN '05 Proceedings of the 4th international symposium on Information processing in sensor networks
Boundary recognition in sensor networks by topological methods
Proceedings of the 12th annual international conference on Mobile computing and networking
A practical evaluation of radio signal strength for ranging-based localization
ACM SIGMOBILE Mobile Computing and Communications Review
Rendered path: range-free localization in anisotropic sensor networks with holes
Proceedings of the 13th annual ACM international conference on Mobile computing and networking
On the error characteristics of multihop node localization in ad-hoc sensor networks
IPSN'03 Proceedings of the 2nd international conference on Information processing in sensor networks
Relative location estimation in wireless sensor networks
IEEE Transactions on Signal Processing
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Localization is useful for many position-dependent applications in wireless sensor networks, where distance estimation from sensor nodes to beacon nodes plays a fundamental role. Most current ranging methods rely on an assumption that deployed WSNs are isotropic. Hence, adjustments on measured distances are the same in all directions. Unfortunately, this assumption does not hold in practice. Present methods introduce such great ranging errors that they are not feasible for real applications. In order to obtain better distance estimation in anisotropic WSNs, we propose a new metric, Dominating Degree, to describe the local deployment characteristics of sensor nodes, and to identify turning nodes along paths. We further propose a method to scale deployment irregularities of WSNs as global characteristics. Finally, appropriate adjustments to distance measurements are performed by synthesizing both local and global characteristics. Simulation results show that the proposed method outperforms PDM and DV-distance especially when beacon nodes are not deployed uniformly.