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Greedy Successive Anchorization for Localizing Machine Type Communication Devices

Title
Greedy Successive Anchorization for Localizing Machine Type Communication Devices
Author
김동우
Keywords
distributed localization; successive anchorization; positioning error; Cramer-Rao lower bound; WIRELESS SENSOR NETWORKS; RELATIVE LOCATION ESTIMATION; LOCALIZATION; NODES
Issue Date
2016-12
Publisher
MDPI AG
Citation
SENSORS, v. 16, No. 12, Article no. 2115
Abstract
Localization of machine type communication (MTC) devices is essential for various types of location-based applications. In this paper, we investigate a distributed localization problem in noisy networks, where an estimated position of blind MTC machines (BMs) is obtained by using noisy measurements of distance between BM and anchor machines (AMs). We allow positioned BMs also to work as anchors that are referred to as virtual AMs (VAMs) in this paper. VAMs usually have greater position errors than (original) AMs, and, if used as anchors, the error propagates through the whole network. However, VAMs are necessary, especially when many BMs are distributed in a large area with an insufficient number of AMs. To overcome the error propagation, we propose a greedy successive anchorization process (GSAP). A round of GSAP consists of consecutive two steps. In the first step, a greedy selection of anchors among AMs and VAMs is done by which GSAP considers only those three anchors that possibly pertain to the localization accuracy. In the second step, each BM that can select three anchors in its neighbor determines its location with a proposed distributed localization algorithm. Iterative rounds of GSAP terminate when every BM in the network finds its location. To examine the performance of GSAP, a root mean square error (RMSE) metric is used and the corresponding Cramer-Rao lower bound (CRLB) is provided. By numerical investigation, RMSE performance of GSAP is shown to be better than existing localization methods with and without an anchor selection method and mostly close to the CRLB.
URI
http://www.mdpi.com/1424-8220/16/12/2115/htmhttps://repository.hanyang.ac.kr/handle/20.500.11754/71367
ISSN
1424-8220
DOI
10.3390/s16122115
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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