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CR의 송신 전력 제어를 위한 게임 이론 연구

Game Theory for Transmission Power Control of Cognitive Radio

  • Hwang, In-Kwan (Department of Radio Engineering, Chungbuk National University) ;
  • Lee, Ryoung-Kyoung (Department of Radio Engineering, Chungbuk National University) ;
  • Cho, Hae-Keun (Department of Radio Engineering, Chungbuk National University) ;
  • Lim, Yeon-Jun (Department of Radio Engineering, Chungbuk National University) ;
  • Ko, Eun-Kyoung (Department of Radio Engineering, Chungbuk National University) ;
  • Song, Myoung-Sun (Electronic and Telecommunications Research Institute)
  • 발행 : 2007.04.30

초록

본 논문에서는 CR(Cognitive Radio)의 가장 적합한 인공지능 기술로 주목받고 있는 게임 이론을 전력 제어 방식에 적용해 CDMA 시스템 기반의 사용효율과 효용에 대한 성능 평가 결과를 제시하였다. 사용자와 네트워크 동시 최적화를 위한 효용함수식을 정의하였으며 모의실험을 통해 FOM(Figure of Merit)과 형평성(Fairness)에서 기존의 폐루프 전력 제어 방식보다 월등한 성능을 입증하였다. 또한 게임 이론을 적용한 전력 제어 방식은 통신 환경을 인지하고 연산하여 적합한 최적의 서비스를 제공하는 CR의 여러 분야에 확장 적용 가능함을 제시하였다.

In this paper, the game theory based power control for CDMA system is studied, which has attained intensive interest as a core artificial intelligent technology fur cognitive Radio and its efficiency is evaluated using performance metrics such as system throughput and fairness. Utility Function for joint user centric and network centric power control is defined and simulation results show that game theory based power control is far better than closed loop power control. The contribution of this raper is to formalize the game theory based power control toward the cognitive radio that recognizes and adapts to the radio communication environments.

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참고문헌

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