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Large Scale Failure Adaptive Routing Protocol for Wireless Sensor Networks

무선 센서 네트워크를 위한 대규모 장애 적응적 라우팅 프로토콜

  • 이좌형 (강원대학교 컴퓨터정보통신공학과) ;
  • 선주호 (강원대학교 컴퓨터정보통신공학과) ;
  • 정인범 (강원대학교 컴퓨터정보통신공학)
  • Published : 2009.02.28

Abstract

Large-scale wireless sensor network are expected to play an increasingly important role for the data collection in harmful area. However, the physical fragility of sensor node makes reliable routing in harmful area a challenging problem. Since several sensor nodes in harmful area could be damaged all at once, the network should have the availability to recover routing from node failures in large area. Many routing protocols take accounts of failure recovery of single node but it is very hard these protocols to recover routing from large scale failures. In this paper, we propose a routing protocol, which we refer to as LSFA, to recover network fast from failures in large area. LSFA detects the failure by counting the packet loss from parent node and in case of failure detection LSFAdecreases the routing interval to notify the failure to the neighbor nodes. Our experimental results indicate clearly that LSFA could recover large area failures fast with less packets than previous protocols.

무선센서네트워크는 위험 지역에서의 데이터 수집 용도로 최근 각광받고 있는 기술이다. 하지만 위험한 지역에서는 다수 노드들에서 동시 다발적인 장애발생 위험이 크기 때문에 대규모의 장애를 빠르게 복구시키기 위한 자가 복구 능력을 높여야 한다. 기존의 라우팅 프로토콜들은 하나의 노드에서 발생한 장애는 빠르게 복구하지만 다수의 노드들에서 장애 발생시 이에 효과적으로 대처하지 못한다. 이에 본 논문에서는 대규모 장애 발생시 이를 빠르게 복구하기 위한LSFA(Large Scale Failure Adaptive Routing Protocol)을 제안한다. LSFA는 다수의 노드들에 장애가 발생하여 데이터 전송이 이루어지지 못하는 환경에서 장애를 빠르게 감지하고 라우팅 주기를 적응적으로 조절하여 빠른 시간에 네트워크를 복구한다. LSFA는 패킷손실 정도를 장애발생 판단의 기준으로 사용하며 장애를 감지하면 라우팅 주기를 짧게 하여 장애가 발생한 사실이 네트워크에 빠르게 퍼지도록 한다. 베이스스테이션으로의 경로를 유지하고 있는 노드가 주위에 장애가 발생한 사실을 감지하면 자신의 라우팅 정보를 빠르게 전파시켜 장애 복구가 빠르게 이루어지도록 한다. 실험을 통하여 LSFA가 다른 프로토콜들에 비해 적은 패킷을 사용하면서도 장애를 빠르게 복구함을 보인다.

Keywords

References

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