Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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A Multi-hop Reservation Method for End-to-End Latency Performance Improvement in Asynchronous MAC-based Wireless Sensor Networks

비동기식 MAC프로토콜 기반의 무선 센서 네트워크에서 단대단 시간 지연 성능 향상을 위한 멀티 홉 예약 기법의 제안

  • Hong, Sung-Hwa (Division of Computer Science, Dongyang Mirae University) ;
  • Jung, Suk-Yong (Division of Computer Science, Dongyang Mirae University)
  • Received : 2010.05.06
  • Accepted : 2010.07.06
  • Published : 2010.07.31
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Abstract

X-MAC reduces transmission delay and energy consumption by using a short preamble instead of the existing long preamble. To solve the problem of X-MAC, this paper proposes a new MAC protocol called Express-MAC. The wireless sensor network is mainly used for the purpose of gathering event data or situation information. Especially, the transmission pattern of the sensor network with the purpose of event detection such as intrusion detection is very intermittent as well as successively occurring when a single event takes place in most cases. By reflecting sensor network's key transmission patterns as above, EX-MAC has used multi-hub path's path reservation system and awake section's transmission time reservation method in data transmission when the first event takes place. The awake time reservation in transmission path has improved successive data transmission's end-to-end delay, and it has also increased efficiency in terms of energy consumption by reducing the preamble length of data transmission and reception node.

긴 preamble을 사용하는 비동기식 MAC 프로토콜의 문제점을 개선하기 위해 나온 프로토콜이 X-MAC 이다. 본 논문에서는 X-MAC의 문제점을 해결하기 위하여 Express-MAC이라는 새로운 MAC프로토콜을 제안하였다. 무선센서 네트워크는 주로 이벤트 데이터나 상황정보를 인지하는 목적에 많이 사용된다. 특히 침입감지 같은 이벤트 감지를 목적으로 하는 센서네트워크의 전송 패턴은 매우 간헐적이면서도 한 번의 이벤트 발생 시 연속적으로 일어나는 것이 대부분이다. EX-MAC은 위와 같은 센서 네트워크의 주요 전송 패턴을 반영하여 첫 이벤트 발생 시 데이터 전송에서 멀티 홉 경로의 채널 예약 및 awake 구간의 전송 시간 예약 방식을 사용하였다. 전송 경로상의 awake 시간 예약은 연속적인 데이터 전송의 단대단 지연 성능을 향상시켰으며 데이터 송수신 노드의 preamble 길이를 줄임으로써 에너지 소비 측면에서도 효율성을 증대시켰다.

Keywords

References

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