Analysis of Unsaturation Performance of IEEE 802.11 DCF with and without Slow Contention Window Decrease(Communication Theory, <Special Section>Information Theory and Its Applications)
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概要
- 論文の詳細を見る
Most of analytical models proposed so far for the IEEE 802.11 distributed coordination function (DCF) focus on saturation performance. In this paper, we develop an analytic model for unsaturation performance evaluation of the IEEE 802.11 DCF with and without slow contention window decrease (SCWD). The model explicitly takes into account the carrier sensing mechanism and an additional backoff interval after successful frame transmission, both of which can be ignored under saturation conditions. Expressions are derived for throughput and delay characteristics by means of the equilibrium point analysis. The accuracy of our model is validated through computer simulation. Numerical results based on the IEEE 802.11b with CCK show that the SCWD can stably achieve approximately 20% performance gain over the normal 802.11 DCF under unsaturation conditions as well as saturation ones.
- 社団法人電子情報通信学会の論文
- 2005-10-01
著者
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YAMAKITA Jiro
Faculty of Computer Science and System Engineering, Okayama Prefectural University
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Yamakita J
Okayama Prefectural Univ. Soja‐shi Jpn
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Yamakita J
The Faculty Of Information Engineering Okayama Prefectural University
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Yamakita Jiro
Faculty Of Computer Science And System Engineering Okayama Prefectural University
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Yamakita Jiro
The Faculty Of Information Engineering Okayama Prefecture University
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CHIKADA Shogo
Department of Communication Engineering, Okayama Prefectural University
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SAKAKIBARA Katsumi
Faculty of Computer Science and System Engineering, Okayama Prefectural University
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CHIKADA Shogo
Faculty of Computer Science and System Engineering, Okayama Prefectural University
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Sakakibara Katsumi
Faculty Of Computer Science & System Engineering Okayama Prefectural University
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Chikada Shogo
Faculty Of Computer Science And System Engineering Okayama Prefectural University
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