대한전자공학회논문지TC (Journal of the Institute of Electronics Engineers of Korea TC)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

IEEE 802.11 Wireless LAN에서의 QoS 지원을 위한 Backoff Algorithm에 관한 연구

A Study on Backoff Algorithm for QoS in IEEE 802.11 Wireless LAN

  • 조재용 (인하대학교 정보통신대학원) ;
  • 김석호 (인하대학교 정보통신대학원) ;
  • 류동관 (인하대학교 정보통신대학원) ;
  • 곽경섭 (인하대학교 정보통신대학원)
  • 발행 : 2003.12.01
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초록

IEEE 802.11 WLAN(Wireless LAN)은 그 편리함과 효율성으로 인하여 급격히 시장에 보급되었다. 반면에 다양한 멀티미디어 서비스를 위하여 QoS(Qualify of Service)의 지원이 필요하게 되었다. 본 논문에서는 IEEE 802.11과 IEEE 802.11e의 MAC 방식과 트래픽 카테고리(Traffic Category)별 차별화 서비스를 통한 QoS지원 방식을 살펴본다. 또한, 최근까지 제안된 여러 가지 백 오프 알고리즘을 비교 분석한다. 그 결과 새로운 백 오프 알고리즘인Collision Rate Based-Enhanced Distributed Coordination Function(CRB-EDCF)을 제안한다. 컴퓨터 시뮬레이션을 통해 제안된 CRB-EDCF 알고리즘은 Throughput을 향상시키고 QoS를 지원하는 것을 확인하였다.

According to the convenience and efficiency, IEEE 802.11 WLAN(Wireless LAN) has became rapidly wide-spread on the market. However, QoS support is needed for various multimedia service. In this paper, we consider both MAC method of IEEE 802.11 and IEEE 802.11e and Traffic Category differentiated service by QoS support method. In addition, we study currently existing back-off algorithms in view of comparative analysis. As a result we propose a new back-off algorithm called Collision Rate Based-EDCF. The proposed back-off algorithm confirms the performance by computer simulations in terms of Throughput, and QoS support.

키워드

참고문헌

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