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

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Performance of Dynamic Spectrum Access Scheme Using Embedded Markov Chain

임베디드 마르코프 체인을 이용한 동적 스펙트럼 접속 방식의 성능 분석

  • Lee, Yutae (Department of Information and Communication Engineering, Dongeui University)
  • Received : 2013.04.10
  • Accepted : 2013.09.02
  • Published : 2013.09.30
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Abstract

In this paper, we consider two dynamic spectrum access schemes in cognitive network with two independent and identically distributed channels. Under the first scheme, secondary users switch channel only after transmission failure. On the other hand, under the second one, they switch channel only after successful transmission. We develop a mathematical model to investigate the performance of the second one and analyze the model using 3-dimensional embedded Markov chain. Numerical results and simulations are presented to compare between the two schemes.

본 논문은 동일한 확률적 특성을 갖는 두 개의 독립된 채널이 있는 환경에서 동적 스펙트럼 접속 방식의 성능을 수학적으로 분석한다. 여기서 고려하는 동적 스펙트럼 접속 방식은 다음과 같다. 첫 번째 방식은 전송에 성공한 경우 동일한 채널을 다시 센싱하고, 실패한 경우 다른 채널을 센싱하는 방식이다. 두 번째 방식은 전송에 실패한 경우 동일한 채널을 다시 센싱하고, 성공한 경우 다른 채널을 센싱하는 방식이다. 본 논문은 두 번째 방식에서 이차 사용자의 시스템 처리율과 일차 사용자와의 겹침 확률을 3차원 임베디드 마르코프 체인을 이용하여 수학적으로 분석한다. 또한, 두 방식의 성능을 수학적 분석과 시뮬레이션을 통해 비교한다.

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