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 Hand-off Technique for Cellular Networks Using Game Theory

셀룰라 네트워크에서 게임 이론을 이용한 핸드오프 기법

  • 홍진대 (군산대학교 정보통신공학과) ;
  • 이신규 (군산대학교 정보통신공학과) ;
  • 김현태 (군산대학교 BK-21 지능형 임베디드시스템 인력양성 사업팀) ;
  • 나인호 (군산대학교 정보통신공학과)
  • Published : 2009.11.30
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Abstract

In cellular network systems one of the most significant quality metrics to measure quality of performance is the average number of call drops in a system. It ensures that the active calls in the system are successfully completed without being dropped in the mid communication for ultimate customer satisfaction. Hand-off mechanism increases cellular system reliability by seamless continuation of active calls by transferring active calls from one base station to another. In this paper, we study and propose a simple hand-off mechanism using game theory. We conclude that using the simple QoS utility function proposed in this paper, our optimal deterministic hand-off strategy is to transfer the active calls to the base station with greater signal-to-interference ratio (SIR) and greater number of available channels.

셀룰러 네트워크 시스템에서 성능 품질을 평가하기 위한 가장 중요한 측정 기준 중의 하나는 평균 호 절단(average call drops)수이다. 따라서 사용자에게 만족할 만한 통신 품질을 제공받기 위해서는 사용자가 이동하더라도 서비스 중인 활성 호(active call)가 통신 도중에 절단되지 않고 성공적으로 수행 완료되도록 하는 것이 중요하다. 핸드오프는 임의의 기지국에서 또 다른 기지국으로 활성 호를 중계 할 때 끊기는 현상 없이 연결의 연속성을 보장하여 셀룰러 시스템의 신뢰성을 높이는 기법이다. 본 논문에서는 게임 이론을 이용한 핸드오프 기법과 서비스품질 효용 함수(QoS utility function)를 제안하여 활성 호가 SIR(signal-to-interference ratio)이 높고 가용 채널 수가 많은 기지국으로 전달될 수 있도록 하였다.

Keywords

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