Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (6): 89-94.doi: 10.3969/j.issn.1000-565X.2010.06.017

• Computer Science & Technology • Previous Articles     Next Articles

Optimization of MAC Performance Based on Channel Rate in Wireless Networks

Xu Zhuo-nong1  Wang Jian-xin1  Su Yan-rong2   

  1. 1.School of Information Science and Engineering,Central South University,Changsha 410083,Hunan,China;2.School of Computer and Information Engineering,Central South University of Forestry and Technology,Changsha 410004,Hunan,China
  • Received:2009-09-11 Revised:2010-01-18 Online:2010-06-25 Published:2010-06-25
  • Contact: 徐卓农（1971-），女，博士生，副教授，主要从事无线网络、MAC层性能优化研究． E-mail:xzn71@126．com
  • About author:徐卓农（1971-），女，博士生，副教授，主要从事无线网络、MAC层性能优化研究．
  • Supported by:

    国家自然科学基金资助项目（60673164）; 国家“863”计划项目（2009AA11Z205）; 湖南省教育厅科学研究项目（07C804）

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Abstract:

The existing wireless network standards provide multiple channel rates for data transmission.However,the multi-rate adjustment mechanism does not take into consideration the impact of the physical carrier sense range.This paper analyzes the interference model and spatial reuse of wireless networks and proposes an adaptive power and rate algorithm（PRA） that indirectly adjusts the physical carrier sense range by tuning the transmission power.In PRA,an appropriate channel rate is estimated according to the distance between communication node pairs,which helps to adaptively achieve high channel rate and suitable transmission power.Simulated results show that the proposed algorithm effectively improves the network throughout and the fairness,and reduces the power consumption.

Key words: wireless networks, carrier sense, channel rate, transmission power