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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Performance Evaluation of Cooperative Spectrum Sensing in Maritime Cognitive Radio Networks

해양 인지 무선 네트워크에서 협력적 센싱 기법의 성능 평가

  • Nam, Yujin (Department of Electronic Engineering, Sogang University) ;
  • Lee, Yundong ;
  • Lee, Seong Ro (Mokpo National University Department of Information & Electronics Engineering) ;
  • Jeong, Min-A (Mokpo National University Department of Computer Engineering) ;
  • So, Jaewoo (Department of Electronic Engineering, Sogang University)
  • Received : 2014.10.08
  • Accepted : 2014.11.17
  • Published : 2014.11.28
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Abstract

This paper proposes a cooperative spectrum sensing algorithm in a maritime cognitive radio network and evaluates the performance of proposed algorithm. In the proposed algorithm, the secondary ships decide whether to transmit the feedback information or not on the basis of the threshold when the number of available feedback information of the ships is limited. The fusion ship detects whether the channel is available or not on the basis of the feedback information. This paper evaluates the proposed algorithm in terms of the detection probability and the number of secondary ships that are fed back in the maritime cognitive radio network. The simulation results show the proposed algorithm significantly reduces the feedback overhead even though the detection probability is somewhat declined.

본 논문은 해양 인지 무선 네트워크에서 제한된 피드백을 가지는 협력적 센싱 알고리듬을 제안하고, 제안하는 알고리듬을 기반으로 협력적 센싱 알고리듬의 성능을 평가한다. 제안하는 협력적 센싱 기법은 선박들이 사용 가능한 피드백 양이 제한된 환경에서 차순위 선박들이 문턱값을 기반으로 퓨전 선박에 피드백 여부를 결정하고, 퓨전선박은 수신한 신호를 기반으로 채널 사용 가능 여부를 판단한다. 제안하는 협력적 센싱 기법은 피드백 오버헤드 감소를 목적으로 한다. 해양 인지 무선 네트워크 환경에서 문턱값 기반 협력적 센싱 알고리듬을 사용할 때 센싱 기법의 성능을 검출 확률과 차순위 선박 수에 따른 피드백 선박 수의 측면에서 평가한다. 모의실험을 통하여 제안하는 협력적 센싱 기법은 검출 확률이 다소 감소하나, 피드백 양이 크게 감소하는 것을 확인하였다.

Keywords

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