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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Cluster-Based Routing Mechanism for Efficient Data Delivery to Group Mobile Users in Wireless Ad-Hoc Networks

그룹 이동성을 가지는 모바일 사용자들 간의 효율적인 데이터 공유를 위한 클러스터 기반 그룹 라우팅 기법 메커니즘

  • 유진희 (이화여자대학교 컴퓨터공학과 지능형 네트워크 시스템 연구실) ;
  • 한경아 (이화여자대학교 컴퓨터공학과 지능형 네트워크 시스템 연구실) ;
  • 정다희 (이화여자대학교 컴퓨터공학과 지능형 네트워크 시스템 연구실) ;
  • 이형준 (이화여자대학교 컴퓨터공학과 지능형 네트워크 시스템 연구실)
  • Received : 2013.08.28
  • Accepted : 2013.10.30
  • Published : 2013.11.30
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Abstract

In this paper, we present a cluster-based routing scheme for efficiently delivering data to group mobile users by extracting and clustering mobile user group simply from beacon message information in wireless ad-hoc networks. First, we propose an online-clustering mechanism that uses a local neighbor table on each node by recursively transmitting to neighbor nodes, and forms a group table where a set of listed nodes are classified as group members, without incurring much overhead. A node that appears the most frequently from neighbor tables throughout the network is selected as the cluster-head node, serving as a data gateway for the intra-cluster. Second, we design an inter-cluster routing that delivers data from stationary data sources to the selected cluster-head node, and a intra-cluster routing to deliver from the cluster-head node to users. Simulation results based on ns-2 in the ad-hoc networks consisting of 518 stationary nodes and 20 mobile nodes show that our proposed clustering mechanism achieves high clustering accuracy of 96 % on average. Regarding routing performance, our cluster-based routing scheme outperforms a naive one-to-one routing scheme without any clustering by reducing routing cost up to 1/20. Also, our intra-cluster routing utilizing a selected cluster-head node reduces routing cost in half as opposed to a counterpart of the intra-cluster routing through a randomly-selected internal group member.

본 논문에서는 무선 애드혹 네트워크상에서 그룹 이동성이 있는 모바일 사용자들을 beacon 메시지 수신 상태 정보만을 이용하여 분산적인 방법으로 온라인 클러스터링 하는 기법과 그룹 내로 데이터를 효과적으로 전달하기 위한 클러스터 헤드 노드를 선정하는 기법을 제시하고, 선정한 클러스터 헤드 노드를 통해 그룹 내부로 데이터를 전달할 수 있는 효율적인 그룹 라우팅 기법을 제안한다. ns-2를 이용하여 518개의 정적 노드와 20개의 동적 노드로 구성된 네트워크에 대해 성능 평가한 결과, 평균적으로 96 %의 높은 클러스터링 정확도를 보임을 확인할 수 있었다. 또한 그룹의 개념 없이 개별적으로 모바일 노드들로 일대일 라우팅을 한 경우에 비해 제안한 클러스터 기반 라우팅 기법을 사용했을 경우, 총 라우팅 비용이 1/20 정도로 감소하였으며, 그룹의 개념은 존재하지만 임의의 모바일 노드를 통해 intra-cluster 라우팅 했을 경우에 비해, 제안한 클러스터 헤드 노드를 통해 라우팅 했을 경우, 라우팅 비용이 평균적으로 1/2 정도로 감소함을 확인할 수 있었다.

Keywords

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