The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Multihop Range-Free Localization with Virtual Hole Construction in Anisotropic Sensor Networks

비등방성 센서 네트워크에서 가상 홀을 이용한 다중 홉 Range-Free 측위 알고리즘

  • 이상우 (한양대학교 전자컴퓨터통신공학과 무선통신시스템 연구실) ;
  • 김선우 (한양대학교 융합전자공학부 무선통신시스템 연구실)
  • Received : 2012.11.15
  • Accepted : 2013.01.04
  • Published : 2013.01.31
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Abstract

This paper presents a multihop range-free localization algorithm to estimate the physical location of a normal node with local connectivity information in anisotropic sensor networks. In the proposed algorithm, a normal node captures the detour degree of the shortest path connecting an anchor pair and itself by comparing the measured hop count and the expected hop count, and the node estimates the distances to the anchors based on the detour degree. The normal node repeats this procedure with all anchor combinations and pinpoints its location using the obtained distance estimates. The proposed algorithm requires fewer anchors and less communication overhead compared to existing range-free algorithms. We showed the superiority of the proposed algorithm over existing range-free algorithms through MATLA simulations.

본 논문에서는 비등방성 센서 네트워크에서 노드 간 연결 정보만을 이용하여 일반노드의 위치를 찾는 다중 홉 Range-free 측위 알고리즘을 제안한다. 제안하는 측위 알고리즘에서 일반노드는 자신과 앵커노드 쌍이 이루는 최단경로의 측정 홉 수와 기대 홉 수를 비교하여 최단경로의 우회 정도를 측정하고, 우회 정도에 따라 자신으로부터 앵커노드까지의 거리를 추정한다. 일반노드는 이러한 과정을 네트워크의 모든 앵커노드 쌍에 대하여 반복하며, 획득한 거리 정보를 사용하여 위치를 추정한다. 제안하는 알고리즘은 기존의 Range-free 알고리즘에 비해 적은 수의 앵커노드를 필요로 하며, 적은 통신 오버헤드를 갖는다. 마지막으로 성능평가를 위하여 MATLAB 시뮬레이션을 수행하였으며, 기존의 Range-free 측위 알고리즘에 비해 향상된 위치정확도를 보였다.

Keywords

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