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A Congestion Control Scheme Considering Traffic in Large-Scale Wireless Sensor Networks

대규모 무선 센서 네트워크에서 트래픽을 고려한 혼잡제어

  • 곽문상 (동국대학교 컴퓨터공학과) ;
  • 홍영식 (동국대학교 컴퓨터공학과)
  • Received : 2014.05.12
  • Accepted : 2014.10.10
  • Published : 2015.01.15

Abstract

Large-scale wireless sensor networks are constructed by using a large number of sensor nodes that are non-uniformly deployed over a wide area. As a result, the data collected by the sensor nodes are similar to that from one another since a high density of the sensor nodes may cause an overlap. As a result of the characteristics of the traffic, data is collected from a plurality of sensor nodes by a sink node, and when the sensor nodes transmit their collected data to the sink node, the sensor nodes around the sink node have a higher amount of traffic than the sensor nodes far away from the sink node. Thus, the former sensor encounter bottlenecks due to traffic congestion and have an energy hole problem more often than the latter ones, increasing energy consumption. This paper proposes a congestion control scheme that considers traffic flows in order to control traffic congestion of the sensor nodes that are non-uniformly deployed over a large-scale wireless sensor network.

대규모 무선 센서 네트워크는 넓은 지역에 불균일하게 많은 수의 센서노드들이 분포하므로 높은 조밀한 밀집도로 인해 센서노드들이 수집한 데이터들이 서로 유사하거나 중복될 수 있다. 다수의 센서노드에서 싱크노드로 수렴하는 트래픽 특성으로 인해 센서노드들이 수집한 데이터를 싱크노드로 전송할 때 싱크노드 주변의 센서노드들은 싱크노드로부터 멀리 떨어져 있는 센서노드들에 비해 트래픽 양이 많아 혼잡이 발생하여 병목문제가 발생하고, 에너지 소모량도 증가하여 에너지 홀 문제가 발생한다. 본 논문에서는 대규모 무선 센서 네트워크에서 불균일하게 분포되어 있는 센서노드들의 혼잡을 제어하기 위한 트래픽을 고려한 혼잡제어기법를 제안하였다.

Keywords

References

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