Localization in heterogeneous wireless sensor networks using elliptical range estimation
Conference
Golestanian, M, Poellabauer, C. (2016). Localization in heterogeneous wireless sensor networks using elliptical range estimation
. 10.1109/ICCNC.2016.7440701
Golestanian, M, Poellabauer, C. (2016). Localization in heterogeneous wireless sensor networks using elliptical range estimation
. 10.1109/ICCNC.2016.7440701
In contrast to range-based localization techniques, range-free localization schemes for wireless sensor networks (WSNs) can provide reasonably accurate positioning without the cost of additional hardware. However, existing solutions to range-free localization assume homogeneous and dense network scenarios, i.e., networks where all nodes have identical transmission ranges and network partitions do not occur. In this paper, we apply the concept of range-based localization to heterogeneous networks, i.e., networks where nodes have varying radio signal strengths and, therefore, different communication ranges. We study the some of the most important challenges in heterogeneous sensor networks (i.e. coverage and localization accuracy) and show how transmission range adaptations can balance these objectives. We further introduce (i) a range estimation method based on the elliptic properties of paths between sensor nodes in a heterogeneous network and (ii) a range-free localization scheme based on this estimation method. The performance of the proposed scheme has been investigated for different network topologies.
