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Journal of Applied Sciences ›› 2009, Vol. 27 ›› Issue (5): 453-458.

• Communication Engineering • Previous Articles     Next Articles

Analytical Throughput Model of IEEE 802.11 DCF under Unsaturated Conditions

  

  1. 1. College of Computer and Information, Hefei University of Technology, Hefei 230009, China
    2. School of Information and Engineering, Huangshan University, Huangshan 245021, Anhui Province, China
    3. Engineering Research Center of Safety Critical Industry Measure and Control Technology under the Ministry of
    Education, Hefei 230009, China
  • Received:2009-04-14 Revised:2009-06-18 Online:2009-09-25 Published:2009-09-25

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Abstract:

Currently, a two dimensional Markov chain is generally used in mathematical modeling to evaluate the performance of IEEE 802.11 DCF under unsaturated conditions. Based on the notion that DCF shows fairness for all contending nodes in the network, this paper derives an average transmission cycle period of a node in unsaturated traffic environments and a mathematical representation of the throughput. Compared with existing works, the proposed approach is simple and can reflect the actual mechanism of DCF. There is a close match between the theoretical derivations and simulation results, indicating effectiveness of the proposed model.

Key words: 802.11, analytical model, non-saturated throughput

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