대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)

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

IEEE 802.11b 무선랜에서 트래픽 부하에 따른 적응적인 PCF MAC 스케줄링 기법

Traffic-Adaptive PCF MAC Scheduling Scheme Based on IEEE 802.11b Wireless LAN

  • 신수영 (덕성여자대학교 컴퓨터과학부) ;
  • 장영민 (국민대학교 정보통신공학부) ;
  • 강신각 (한국전자통신연구원)
  • 발행 : 2003.11.01
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초록

In IEEE 802.11b, Medium Access Control Sublayer consists of DCF (Distributed Coordination Function) and PCF (Point Coordination Function). DCF provides contention based services and PCF provides contention free services for QoS satisfaction. DCF uses CSMA/CA (Carrier Sense Multiple Access/Collision Avoidance) as an access protocol. And PCF uses Polling Scheme. In this paper, a modified New-PCF, which gives weights to channels with heavier traffic load, was suggested. NS-2 simulations were conducted to compare the service performances with original DCF, PCF and the modified New-PCF respectively. Simulation results has shown the increased overall throughput with the proposed New-PCF compared with other cases.

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