slugAnalysis for Saturation Throughput Using Various Mechanisms for IEEE 802.11 WLAN'S
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2014, Vol 2, Issue 5
Abstract
The IEEE has standardized the 802.11 protocol for Wireless Local Area Networks. The primary medium access control (MAC) technique of 802.11 is called distributed coordination function (DCF). DCF is a carrier sense multiple access with collision avoidance (CSMA/CA) scheme with binary exponential back-off algorithm (BEB). In this paper based on the two types of algorithms that is BEB and Constant Contention Window. In noisy channel, data packets become erroneous, and retransmission reduces the throughput. IEEE 802.11 allows for fragmentation tuning and rate selection to achieve highest throughput in bad channel conditions. If an error rate is known, the parameters like fragment size and contention window can be adjusted to obtain the maximum throughput. In this paper, an analytic model is developed to evaluate the throughput of IEEE 802.11 wireless networks over noisy channels using constant back-off window. The optimal Contention windows and optimal fragment size are calculated using this model.
Authors and Affiliations
K. Nishanth Rao, T. Srinivasa Rao, A. Sai Kumar
Keywords
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