Modeling and analysis of slow CW decrease IEEE 802.11 WLAN
Qiang Ni,Imad Aad,Chadi Barakat,Thierry Turletti +3 more
- 07 Sep 2003
- Vol. 2, pp 1717-1721
TL;DR: The results show that the slow CW decrease scheme can efficiently improve the throughput of IEEE 802.11, and that the throughput gain is higher when the decrease factor is larger.
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Abstract: The IEEE 802.11 medium access control (MAC) protocol provides a contention-based distributed channel access mechanism for mobile stations to share the wireless medium, which may introduce a lot of collisions in case of overloaded active stations. Slow contention window (CW) decrease scheme is a simple and efficient solution for this problem. In this paper, we use an analytical model to compare the slow CW decrease scheme to the IEEE 802.11 MAC protocol. Several parameters are investigated such as the number of stations, the initial CW size, the decrease factor value, the maximum backoff stage and the coexistence with the RequestToSend and ClearToSend (RTS/CTS) mechanism. The results show that the slow CW decrease scheme can efficiently improve the throughput of IEEE 802.11, and that the throughput gain is higher when the decrease factor is larger. Moreover, the initial CW size and maximum backoff stage also affect the performance of slow CW decrease scheme.
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Citations
Saturation throughput analysis of multi-rate IEEE 802.11 wireless networks
Der-Jiunn Deng,Bin Li,Lianfen Huang,Chih-Heng Ke,Yueh-Min Huang +4 more
- 01 Aug 2009
TL;DR: An accurate analytical model is presented to compute the system saturation throughput and the results show that the model is accurate and channel error has a significant impact on system performance.
109
Enhancing IEEE 802.11 MAC in congested environments
TL;DR: This paper analyzes simple slow CW decrease functions and uses simulations and mathematical modeling to show their considerable improvements at all contention levels and transient phases, especially in high congested environments.
73
Backoff design for IEEE 802.11 DCF networks: fundamental tradeoff and design criterion
Xinghua Sun,Lin Dai +1 more
TL;DR: A systematic study on the effect of backoff schemes on throughput and delay performance of saturated IEEE 802.11 DCF networks confirms that QB well preserves the robust nature of BEB and achieves much better queueing performance than BEB.
68
Enhancing IEEE 802.11MAC in congested environments
Imad Aad,Qiang Ni,Chadi Barakat,Thierry Turletti +3 more
- 01 Jan 2005
TL;DR: This paper analyzes simple slow CW decrease functions and uses simulations and mathematical modeling to show their considerable improvements at all contention levels and transient phases, especially in high congested environments.
Determinist contention window algorithm for IEEE 802.11
Adlen Ksentini,Abdelhamid Nafaa,Abdelhak Mourad Gueroui,Mohamed Naimi +3 more
- 11 Sep 2005
TL;DR: Simulation results show that DCWA outperforms both the distributed coordination function (DCF) and the slow decrease (SD) scheme in terms of responsiveness to network load fluctuations, network utilization, and fairness among active stations.
49
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