A Rate Control Scheme Considering Congestion Patterns in Wireless Sensor Networks

무선 센서 네트워크에서 혼잡 패턴을 고려한 전송률 조절 기법

  • 강경현 (광운대학교 전자통신공학과) ;
  • 정광수 (광운대학교 전자통신공학과)
  • Received : 2010.07.30
  • Accepted : 2010.10.05
  • Published : 2010.12.15

Abstract

In event-driven wireless sensor networks, network congestion occurs when event data, which have higher transmission rates than periodic sensing data, arc forwarded to bottleneck links. As the congestion continues, congestion collapse is triggered, so most of packets from source nodes are failed to transmit to a sink node. Rate control schemes can be a solution for preventing the congestion collapse problem. In this paper, a rate control scheme that each node controls child node's data rate based on congestion patterns is proposed. Experiments show that the proposed scheme effectively controls network congestion and successfully transmits more event data packets to a sink node than existing rate control schemes.

이벤트 기반 무선 센서 네트워크에서 주기적인 센싱 데이터에 비해 높은 전송률과 우선순위를 갖는 이벤트 데이터가 병목 구간에 집중되면 네트워크 혼잡이 발생한다. 혼잡이 지속되면 대부분의 데이터가 손실되는 네트워크 붕괴 현상이 나타난다. 전송률 조절 기법은 이러한 네트워크 붕괴 현상을 막기 위한 해결책 중 하나이다. 본 논문에서는 무선 센서 네트워크에서의 혼잡 제어를 위해 각 노드에서 혼잡 패턴에 따라 자식 노드의 전송률을 조절하는 기법을 제안한다. 실험을 통해 제안하는 기법이 효과적으로 혼잡을 제어하고, 기존의 전송률 조절 기법들보다 더 많은 이벤트 데이터를 전송함을 확인하였다.

Keywords

References

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