Journal of KIISE:Databases (한국정보과학회논문지:데이타베이스)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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A Dual-layer Energy Efficient Distributed Clustering Algorithm for Wireless Sensor Networks

무선 센서 네트워크를 위한 에너지 효율적인 이중 레이어 분산 클러스터링 기법

  • 여명호 (충북대학교 정보통신공학과) ;
  • 김유미 (충북대학교 바이오정보기술학과) ;
  • 유재수 (충북대학교 전기전자컴퓨터공학부)
  • Published : 2008.02.15
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Abstract

Wireless sensor networks have recently emerged as a platform for several applications. By deploying wireless sensor nodes and constructing a sensor network, we can remotely obtain information about the behavior, conditions, and positions of objects in a region. Since sensor nodes operate on batteries, energy-efficient mechanisms for gathering sensor data are indispensable to prolong the lifetime of a sensor network as long as possible. In this paper, we propose a novel clustering algorithm that distributes the energy consumption of a cluster head. First, we analyze the energy consumption if cluster heads and divide each cluster into a collection layer and a transmission layer according to their roles. Then, we elect a cluster head for each layer to distribute the energy consumption of single cluster head. In order to show the superiority of our clustering algorithm, we compare it with the existing clustering algorithm in terms of the lifetime of the sensor network. As a result, our experimental results show that the proposed clustering algorithm achieves about $10%{\sim}40%$ performance improvements over the existing clustering algorithms.

최근 무선 센서 네트워크는 다양한 응용분야의 플랫폼으로써 사용되고 있다. 무선 센서를 배치하고, 센서 네트워크를 구성함으로써 원격으로 어떤 영역에 포함된 객체들의 동작, 상태, 위치 등에 관한 정보를 얻을 수 있다. 일반적으로 센서 노드들은 제한된 배터리로 동작하기 때문에 센서 네트워크의 생명주기를 연장시키기 위한 에너지 효율적인 데이타 수집 메커니즘은 필수 조건이다. 본 논문에서는 클러스터 헤드의 에너지 소모를 분산할 수 있는 새로운 클러스터링 기법을 제안한다. 먼저 클러스터 헤드의 역할에 따른 에너지 소모를 분석하고, 클러스터를 수집과 전송을 위한 두 계층으로 분리한다. 다음 각 계층을 담당하는 센서 노드를 선출하여 단일 클러스터 헤드의 에너지 소모를 2개의 센서 노드로 분산한다. 제안하는 클러스터링 기법의 우수성을 보이기 위해 시뮬레이션을 통해 기존의 클러스터링 기법과 성능을 비교했다. 그 결과, 기존의 알고리즘에 비해 생명 주기(lifetime)가 $10%{\sim}40%$ 향상되는 것을 확인할 수 있었다.

Keywords

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