Journal of Korean Institute of Industrial Engineers (대한산업공학회지)

Korean Institute of Industrial Engineers (대한산업공학회)
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Hybrid MAC Protocol for Improving Performance of IEEE 802.11 Wireless LANs

IEEE 802.11 무선랜의 성능 향상을 위한 하이브리드 MAC 프로토콜

  • Choi, Woo-Yong (Department of Industrial and Management Systems Engineering, Dong-A University)
  • 최우용 (동아대학교 산업경영공학과)
  • Received : 2015.02.09
  • Accepted : 2015.03.13
  • Published : 2015.04.15
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Abstract

The DCF (Dcistributed Coordination Function) and PCF (Point Coordination Function) are the basic MAC (Medium Access Control) protocols of IEEE 802.11 wireless LANs. According to the DCF, each node performs the exponential backoff algorithm before the transmission of its data frame. Each node doubles the backoff waiting time before the transmission of its data frame whenever it detects the transmission collision with other nodes. Therefore, as the number of the active nodes having the data frames to transmit increases, the overall MAC performance of the DCF decreases. On the other hand, according to the PCF, each node is granted the transmission opportunity by which the PCF transmission is possible without the collision with other nodes. Therefore, as the number of the active nodes increases, the MAC performance of the PCF increases, In this paper, considering the tradeoff of MAC performance between the DCF and PCF, a hybrid MAC protocol is proposed to enhance the performance of IEEE 802.11 wireless LANs.

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References

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