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

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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WiMAX Channel Allocation Scheme for Heterogeneous Service

다중 서비스 지원을 위한 WiMAX 채널할당기법

  • 이주현 (한국기술교육대학교 전기전자공학과) ;
  • 박형근 (한국기술교육대학교 전기전자공학과)
  • Received : 2010.03.10
  • Accepted : 2010.04.05
  • Published : 2010.08.31
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Abstract

Mobile WiMAX system provides broadband wireless access with a variety of services such as voice, video and data communications and providing QoS for each of these services become an important issue. In Mobile WiMAX system, it is important to allocate resources appropriately in order to support the efficient utilization of resources among various real-time and non real-time services. Although many packet scheduling schemes for real-time services in OFDMA system have been proposed, it need to be modified to apply to Mobile WiMAX system. Since Mobile WiMAX supports five types of service classes, QoS constraints of each class should be taken into consideration. In this paper, we propose an efficient packet scheduling scheme to support various services by considering the QoS constraints of each class.

Mobile WiMAX(Worldwide Interoperability for Microwave Access)는 IEEE 802.16 표준을 기반으로 하는 원거리 무선 접속을 통신 기술로써, 데이터, 음성 및 비디오 등 다양한 QoS(Quality of Service) 조건을 가진 서비스들을 제공하고 있으며, 이러한 서비스들의 QoS를 제공하는 것이 중요한 문제가 되고 있다. 지금까지 OFDMA 환경에서 실시간 및 비실시간 패킷의 QoS를 보장하기 위한 패킷 스케줄링 방법은 많이 연구되었으나, 이를 WiMAX 시스템에 적용하기 위해서는 시스템의 특성을 고려해야 할 필요가 있다. 특히 WiMAX 에서는 여러 가지 QoS 제한조건을 가진 5가지 서비스 클래스를 지원하므로 각각의 클래스들의 특성을 고려하는 것이 중요하다. 따라서 본 논문에서는 WiMAX 시스템에서 제공하는 서비스들의 QoS 제한조건을 고려하여 다양한 서비스들을 효율적으로 제공하는 스케줄링 기법을 제안하고자 한다.

Keywords

References

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