English

应用科学学报 ›› 2009, Vol. 27 ›› Issue (5): 453-458.

• 通信工程 • 上一篇    下一篇

IEEE 802.11 DCF机制非饱和态的吞吐量模型

官骏鸣,陆阳,谢凯,杨飞   

  1. 1. 合肥工业大学计算机与信息学院，合肥230009
    2. 黄山学院信息工程学院，安徽黄山245021
    3. 安全关键工业测控技术教育部工程研究中心，合肥230009
  • 收稿日期:2009-04-14 修回日期:2009-06-18 出版日期:2009-09-25 发布日期:2009-09-25
  • 通信作者: 官骏鸣，博士生，讲师，研究方向：多射频多信道ad hoc网络、传感器网络路由协议，E-mail: jm_guan@126.com；陆阳，教授，博导，研究方向：无线自组织网络、分布式控制，E-mail: luyang.hf@126.com
  • 基金资助:
    国家自然科学基金(No.60873195)；安徽省自然科学基金(No.070412049)；安徽省高校省级自然科学研究项目基金（No.KJ2009B114）；安徽省高校优秀青年人才基金（No.2009SQRZ167）；安全关键工业测控技术教育部工程研究中心开放基金(No.SCIMCT0802)资助项目

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

PDF

1697

被引次数

1

摘要：

当前，为评价IEEE 802.11的DCF非饱和性能，大多采用二维马尔可夫链进行数学建模. 根据DCF机制对竞争节点的公平服务特征，推导出节点工作在非饱和态下的传输周期，进而得到吞吐量的数学表达式. 与已有模型相比，该模型更为简单，同时能够真实地反映DCF的工作机制. 仿真结果与理论结果的吻合证实了模型的有效性.

关键词: 802.11, 分析模型, 非饱和吞吐量

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

中图分类号: