Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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The energy efficient traffic control mechanism in Wireless Sensor Network

무선 센서 네트워크에서 에너지 효율적인 트래픽 제어 메커니즘

  • 장용재 (순천대학교 멀티미디어 공학과) ;
  • 박경욱 (전남대학교 문화콘텐츠학부) ;
  • 이성근 (순천대학교 멀티미디어 공학과)
  • Received : 2011.08.03
  • Accepted : 2011.09.08
  • Published : 2011.10.31
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Abstract

Sensor nodes in Wireless sensor network have limited resources and consume almost all energy to the communication. For its traffic feature as a burst traffic type toward a sink node, it has high probability to network congestion. Network congestion causes packet drops and retransmission of dropped packets draws energy consumption. In particular, the loss of packet that is from the sensor node far away from a sink node requires additional energy consumption by frequent retransmission. This paper presents a traffic control mechanism that determines packet transfer by considering priority of packet and congestion level as well as hop count. Analysis of proposed mechanism by simulation demonstrated that it improved energy efficiency.

무선 센서 네트워크에서 센서 노드들은 제한된 자원을 가지며, 에너지의 대부분을 통신에 소비한다. 대부분의 트래픽이 싱크 노드를 향해 전달되는 형태를 지니므로, 순간적인 네트워크 혼잡 발생 가능성이 높다. 네트워크 혼잡은 패킷의 폐기를 초래하고, 폐기된 패킷의 재전송으로 인하여 에너지가 낭비된다. 특히 싱크 노드로부터 멀리 위치한 센서 노드에서 생성된 패킷의 손실은 추가적인 에너지 소비를 나타낸다. 본 논문에서는 패킷의 우선순위와 혼잡 레벨 뿐만 아니라 홉 카운트를 고려하여 패킷 전송여부를 결정하는 트래픽 제어 메커니즘을 제안한다. 시뮬레이션 방법에 의한 성능 분석을 통해 제안된 메커니즘이 에너지 효율성을 개선한 하였다.

Keywords

References

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