Optimal CW Synchronization Scheme in IEEE 802.11 WLANs

IEEE 802.11 WLAN 환경에서 최적의 CW 공유 방안

  • Lee, Jin-Lee (Division of Computer Engineering, Hanshin University) ;
  • Lee, Su-Bin (Division of Computer Engineering, Hanshin University) ;
  • Kyung, Yeunwoong (Division of Computer Engineering, Hanshin University)
  • 이진이 (한신대학교 컴퓨터공학부) ;
  • 이수빈 (한신대학교 컴퓨터공학부) ;
  • 경연웅 (한신대학교 컴퓨터공학부)
  • Received : 2020.10.08
  • Accepted : 2020.11.28
  • Published : 2020.12.31


In this paper, we propose a optimal CW(Conention Window) synchronization scheme in IEEE 802.11 WLANs. IEEE 802.11 WLANs support DCF(Distributed Coordination Function) mode for the MAC(Medium Access Control) operation. In DCF, the CW increases exponentially according to the collisions and becomes minimum CW according to the success of data transmissions. However, since the base minimum CW value is hardware or standard specific, the number of active stations and network status are not considered to determine the CW value. Even though the researches on optimal CW have beend conducted, they do not consider the optimal CW synchronization among mobile stations which occur network performance degradation. Therefore, this paper calculates the optimal CW value and shares it with mobile stations in the network.


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