The KIPS Transactions:PartC (정보처리학회논문지C)

Korea Information Processing Society (한국정보처리학회)
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Data Dissemination Protocol based on Home Agent and Access Node for Mobile Sink in Sensor Network

센서 네트워크에서 홈에이젼트와 액세스 노드에 기반한 모바일 싱크를 위한 데이터 전송 기법

  • 이좌형 (강원대학교 컴퓨터정보통신공학과) ;
  • 정인범 (강원대학교 컴퓨터정보통신공학)
  • Published : 2008.10.31
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Abstract

The mobile sink is most suitable to guarantee the real time processing to events in ubiquitous environment. However it brings many challenges to wireless sensor networks. In particular, the question of how to transfer the collected data to the mobile sink is an important topic in the aspect of effective management of wireless sensor nodes. In this paper, a new data dissemination model is proposed. Since this method uses the home agent and the access node concepts, it provides reliable and efficient data delivery to mobile sink with minimum overhead. In this proposed method, the information of the mobile sink which is constantly moving is informed only to the home agent node and the access node, instead of all sensor nodes. Thus, the collected data from sensor nodes are transferred to the fixed home agent and it sends these data to the mobile sink. Since the confliction phenomenon between data packets in wireless networks could be reduced, the success ratio of data arriving in the mobile sink is highly enhanced. In our experiments, the proposed method reduces the number of broadcast packets so that it saves the amount of energy consumed for transmitting and receiving the data packets. This effect contributes to prolong the lifetime of the wireless sensor networks operated by batteries.

센서네트워크에서 이동하면서 데이터를 수집하는 모바일 싱크(Mobile Sink)는 유비쿼터스 환경에서 사건들에 대한 실시간 처리에는 적합하지만 많은 문제점을 지니고 있다. 특히 네트워크상에서 이동하는 모바일 싱크로 어떻게 데이터를 전송할 것인가에 대한 의문은 무선 센서 노드들의 효율적 운영 측면에서 중요한 문제가 되고 있다. 본 논문에서는 무선 센서 네트워크에서 모바일 싱크를 위한 새로운 데이터 전송 기법인 DHA를 제안한다. DHA 방법은 홈에이전트 와 액세스 노드의 개념을 사용하여 최소한의 비용으로 모바일 싱크에게 신뢰성 있고 효과적인 데이터 전송을 수행할 수 있다. 제안된 기법에서는 모바일 싱크의 이동 정보는 모든 센서 노드들 대신 홈에이전트와 액세스노드에게만 통보한다. 무선 센서 노드들에서 수집된 데이터들은 고정된 홈에이젼트로 전송하며, 홈에이전트가 이들 데이터를 모바일 싱크로 전송한다. 제안된 방법은 무선망에서 발생하는 데이터 패킷들의 충돌 현상을 감소시킬 수 있으므로 모바일 싱크에 전달되는 패킷 수신 성공률을 향상시킨다. 실험을 통하여 제안된 기법은 무선 센서 네트워크내 에서 브로드캐스트 패킷수를 감소시키며 그 결과 데이터 전송 및 수신에 위하여 소모되는 에너지를 감소시킴을 보인다. 이런 효과는 배터리로 동작하는 무선 센서 네트워크의 전체적인 수명 연장에 기여한다.

Keywords

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