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

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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A Fairness and QoS Supporting MAC(FQSM) Protocol for Wireless Sensor Networks

무선 센서 네트워크에서 공평성과 QoS를 지원하는 MAC 프로토콜

  • Received : 2011.11.29
  • Accepted : 2011.12.12
  • Published : 2012.01.31
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Abstract

In this paper we propose the FQSM(Fairness and QoS Supporting MAC) protocol that supports fairness and Quality of Service(QoS). The received or measured data traffics will be assigned a priority level according to its transmission urgency in the FQSM. And the load prediction algorithm is used to support the fairness between different priority traffics. For this, the buffer length values of the nodes are continuously monitored for a some period. Based on the buffer length variations for this period, the order of transmission is determined. FQSM also adapts cross-layer concept to rearrange the data transmission order in each sensor node's buffer, saves energy consumption by allowing few nodes in data transmission, and prolongs the network lifetime.

본 논문에서는 무선 센서 네트워크에서 서비스의 질(Quality of Service: QoS)과 공평성을 지원하는 MAC 프로토콜(FQSM)을 제안한다. 제안된 FQSM 프로토콜에서는 센서 노드들이 측정 혹은 수신한 데이터를 전송 응급성에 따라 우선순위를 할당하며, 데이터 트래픽 간의 공평성을 지원하기 위해 부하 예측 알고리즘을 사용한다. 부하 예측 알고리즘에서는 현재 입력되는 부하에 기반으로 최대 전송에 대한 임계값을 조정한다. 이를 위해서 각 버퍼 길이가 연속적으로 일정기간 동안 모니터링 된다. 이 기간 동안의 버퍼 길이 변이에 기반으로 트래픽 부하가 예측되며, 이 예측된 값에 기반으로 전송 순위가 결정 된다. FQSM 프로토콜은 또한 cross-layer 개념을 도입하여 각 센서 노드에서 동일한 목적지로 향하는 데이터를 재정돈하여 가능한 적은 노드들만이 데이터 전송에 참여함으로 에너지를 절약함으로 전체 네트워크 수명을 연장한다.

Keywords

References

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