The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Compressed Sensing Based Low Power Data Transmission Systems in Mobile Sensor Networks

모바일 센서 네트워크에서 압축 센싱을 이용한 저전력 데이터 전송 시스템

  • Hong, Jiyeon (Ewha Womans University Department of Electronics Engineering) ;
  • Kwon, Jungmin (Ewha Womans University Department of Electronics Engineering) ;
  • Kwon, Minhae (Ewha Womans University Department of Electronics Engineering) ;
  • Park, Hyunggon (Ewha Womans University Department of Electronics Engineering)
  • Received : 2016.08.05
  • Accepted : 2016.10.12
  • Published : 2016.11.30
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Abstract

In this paper, we propose a system in a large-scale environment, such as desert and ocean, that can reduce the overall transmission power consumption in mobile sensor network. It is known that the transmission power consumption in wireless sensor network is proportional to the square of transmission distance. Therefore, if the locations of mobile sensors are far from the sink node, the power consumption required for data transmission increases, leading to shortened operating time of the sensors. Hence, in this paper, we propose a system that can reduce the power consumption by allowing to transmit data only if the transmission range of the sensors is within a predetermined distance. Moreover, the energy efficiency of the overall sensor network can even be improved by reducing the number of data transmissions at the sink node to gateway based on compressed sensing. The proposed system is actually implemented using Arduino and Raspberry Pi and it is confirmed that source data can be approximately decoded even when the gateway received encoded data fewer than the required number of data from the sink node. The performance of the proposed system is analyzed in theory.

본 논문에서는 사막, 해양과 같은 개활지역에서 모바일 센서 네트워크에서 사용하는 전력량을 감소시킬 수 있는 시스템을 제안한다. 무선 센서 네트워크에서 데이터 전송 전력 소모는 거리의 제곱에 비례하다는 특징이 있다. 따라서 배터리로 동작하는 모바일 센서의 위치가 센서 데이터를 수집하는 싱크 노드와 멀리 떨어져 있을 경우, 데이터를 전송하는데 요구되는 전력 사용량이 높아지게 되어 센서의 동작 시간이 짧아지는 문제가 발생한다. 이에 따라 본 논문에서는 기존 모바일 센서의 전송 가능 거리보다 짧은 전송 거리를 설정하여 센서가 해당 거리 이내에 존재할 때만 데이터를 보내게 함으로써 필요한 전력량을 감소시키는 시스템에 대하여 제안하였다. 뿐만 아니라, 싱크노드에서는 압축 센싱을 이용하여 센서로부터 수집한 데이터를 더 적은 전송 횟수로 게이트웨이에 전송함으로써 전체 네트워크의 에너지 효율을 증가시켰다. 본 논문에서 제안한 시스템은 라즈베리 파이와 아두이노를 이용하여 실제로 구현하였으며, 싱크노드로부터 적은 데이터를 수신하여도 게이트웨이에서 원 데이터와 매우 근사적으로 복호가 가능함을 실험을 통하여 확인하였고 실제 실험 환경에서 제안된 시스템의 성능을 이론적으로 검증하였다.

Keywords

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