Journal of Broadcast Engineering (방송공학회논문지)

The Korean Institute of Broadcast and Media Engineers (한국방송∙미디어공학회)
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Sub-channel Allocation Scheme for Multi-media Service in AMC-based OFDMA Systems

AMC 기반 OFDMA 시스템에서 멀티미디어 서비스를 지원하기 위한 서브 채널 할당 방법

  • Song, Woo-Ram (Kangwon National University, College of Information Technology, Dept. of Electrical and Electronic Engineering) ;
  • Chong, Jo-Woon (KAIST, School of Electrical Engineering & Computer Science, Division of Electrical Engineering) ;
  • Kim, Dong-Hoi (Kangwon National University, College of Information Technology, Dept. of Electrical and Electronic Engineering)
  • 송우람 (강원대학교 IT특성화 대학 전기전자공학부 전자통신공학과) ;
  • 정조운 (한국과학기술원 전자전산학부 전기 및 전자공학) ;
  • 김동회 (강원대학교 IT특성화 대학 전기전자공학부 전자통신공학과)
  • Published : 2009.03.30
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Abstract

In this paper, we propose the method which provides efficient sub-channel allocation for handoff and new call supporting multi-media service in AMC-based OFDMA system. Firstly, we apply the multi-band method which provides different AMC method according to the location of user terminals. Also, in OFDMA system environment that a base station has a lot of sub-channels, we adopt the sub-channel allocation scheme that provides a higher priority to handoff call and real-time service about handoff and new calls with multi-meida service. The simulation results show that the proposed scheme plays a role in increasing the number of new and handoff calls meeting the required blocking rate.

본 논문에서는 AMC(Adaptive Modulation Coding) 기반 OFDMA 시스템에서 멀티미디어 서비스를 지원하는 모든 핸드오버 호와 신규 호 사용자들에 대하여 무선자원 할당의 기본 단위인 서브 채널의 효율적인 할당에 관한 방법을 제안한다. 먼저 셀 내에서는 단말들의 위치에 따라서 다른 변조 및 코딩 방식을 가지는 Multi-band 방식을 적용할 수 있다. 또한 기지국이 여러 개의 서브 채널로 구성되어 있는 OFDMA 시스템 환경에서 멀티미디어 서비스를 가지는 핸드오버 호 또는 신규 호들에 대하여 핸드오버 호와 실시간 서비스에 대한 우선 정책을 주는 서브 채널 할당 방법을 적용한다. 시뮬레이션 결과, 제안된 Multi-band 서브채널 할당 방식은 Single-band 서브채널 할당방식과 비교하여 핸드오버 호와 신규 호의 블럭킹 확률 측면에서 좋은 성능을 보여줌을 확인하였다.

Keywords

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