An Effective Method for Fairness in the Case of Missing CTS

  • Inhye Park
  • Hyungkeun Lee
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6935)


The contention-based DCF of IEEE 802.11 adopts the 4-way handshaking mechanism for reasonable transmission with reduced packet collisions. But, expected CTS is not successfully received by the transmitter, the NAV of the transmitter’s neighbors leads to two problems: degrading channel utilization and unbalancing of fairness. We propose BN-MAC to improve the performance of WLAN using BNACK packet to reset NAV to zero. The neighbors that receive BNACK defer only SIFS for fairness of overall network. The performance of our approach is compared with the IEEE 802.11 DCF and optional DCF by simulation. The results show that our proposed approach reduces end to end delay and improves the channel utilization.


IEEE 802.11 DCF Broadcast NACK Fairness NAV 


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  1. 1.
    IEEE Wireless LAN medium access control (MAC) and physical layer (PHY) specifications. IEEE standard 802.11-2007 (2007)Google Scholar
  2. 2.
    Karn, P.: MACA – a new channel access method for packet radio. In: Proc. 9th ARRL Computer Networking Conference (1990)Google Scholar
  3. 3.
    Chayabejara, A., Zabir, S.M.S., Shiratori, N.: An Enhancement of the IEEE 802.11 MAC for multihop Ad hoc Networks. In: IEEE VTC 2003-Fall, vol. 5, pp. 3020–3024 (2003)Google Scholar
  4. 4.
    Kim, T., Lee, H., Lee, J.: Cho. J.: Cross-Layer Enhancement of IEEE 802.11 MAC for Mobile Ad Hoc Networks. In: Shi, Y., van Albada, G.D., Dongarra, J., Sloot, P.M.A. (eds.) ICCS 2007. LNCS, vol. 4490, pp. 482–489. Springer, Heidelberg (2007)CrossRefGoogle Scholar
  5. 5.
    Du, L., Chen, L.: Receiver Initiated Network Allocation Vector Clearing Method in WLANs. In: APCC 2005, pp. 615–619 (2005)Google Scholar
  6. 6.
    Gunasekaran, R., Sumitha, R., Rhymend, U.V.: Throughput Enhancement in ad hoc Networks Using Virtual Carrier Sensing Mechanism. In: ICEIE 2010, vol. 1, pp. 105–109 (2010)Google Scholar
  7. 7.
    The Network Simulator – ns-2,

Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Inhye Park
    • 1
  • Hyungkeun Lee
    • 1
  1. 1.Department of Computer EngineeringKwangwoon UniversitySeoulKorea

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