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A Multi-Start Local Search Algorithm Finding Minimum Connected Dominating Set in Wireless Sensor Networks

무선 센서 네트워크에서 최소연결지배집합 선출을 위한 다중시작 지역탐색 알고리즘

  • Kang, Seung-Ho (Department of Information Security Dongshin University) ;
  • Jeong, Min-A (Mokpo National University, Department of Computer Engineering) ;
  • Lee, Seong Ro (Mokpo National University, Department of Information and Electronics Engineering)
  • Received : 2015.04.02
  • Accepted : 2015.06.11
  • Published : 2015.06.30

Abstract

As a method to increase the scalability and efficiency of wireless sensor networks, a scheme to construct networks hierarchically has received considerable attention among researchers. Researches on the methods to construct wireless networks hierarchically have been conducted focusing on how to select nodes such that they constitute a backbone network of wireless network. Nodes comprising the backbone network should be connected themselves and can cover other remaining nodes. A problem to find the minimum number of nodes which satisfy these conditions is known as the minimum connected dominating set (MCDS) problem. The MCDS problem is NP-hard, therefore there is no efficient algorithm which guarantee the optimal solutions for this problem at present. In this paper, we propose a novel multi-start local search algorithm to solve the MCDS problem efficiently. For the performance evaluation of the proposed method, we conduct extensive experiments and report the results.

무선 센서 네트워크에서 네트워크의 확장성과 효율성을 높이기 위한 방법으로 네트워크 구조를 계층적으로 구성하는 방법에 관심이 높다. 무선 네트워크를 계층 구조로 구성하는 방법은 특정 노드들을 선별하여 이들을 백본 네트워크로 구성하는 방법을 중심으로 연구가 진행되었다. 백본을 구성하는 노드들은 연결되어 있어서 자신들 간에 통신이 직접적으로 가능해야하며, 백본에 속하지 않은 모든 노드들이 백본을 통해 통신이 가능해야한다. 이러한 조건을 만족하는 최소 크기의 노드 집합을 선출하는 문제를 최소연결지배집합선출 문제라 한다. 최소연결지배집합선출 문제는 복잡도가 NP-hard로 알려져 있으며, 현재 효율적인 알고리즘이 존재하지 않는다. 본 논문은 최소연결지배집합선출 문제를 해결하기 위한 다중시작 지역탐색 알고리즘을 제안하다. 제안 방법의 성능 측정을 위해 다양한 조건에서 실험하고 결과를 제시한다.

Keywords

References

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