| DCA协议的饱和吞吐量分析与最优带宽分配 |
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| 引用本文： | 周树桥,袁睿翕.DCA协议的饱和吞吐量分析与最优带宽分配[J].清华大学学报(自然科学版),2012(1):31-35. |
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| 作者姓名： | 周树桥 袁睿翕 |
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| 作者单位： | 清华大学自动化系清华信息科学与技术国家实验室 |
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| 基金项目： | 国家自然科学基金资助项目(60721003),国家自然科学基金重点项目(60736027) |
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| 摘 要： | 动态信道分配(dynamic channel assignment,DCA)协议是一种经典的基于公用控制信道的多接口多信道无线网介质访问控制(medium access control,MAC)协议。为更全面地评估DCA协议的饱和吞吐量性能,首先通过分析DCA协议在控制信道和数据信道上的传输特性,建立了DCA协议饱和吞吐量的理论模型;然后,基于ns2网络仿真平台进行仿真实验,验证了模型的准确性以及对饱和转移临界条件的预测能力;基于该理论模型,进一步设计了信道最优带宽分配策略。理论计算以及仿真实验均表明:该信道分配策略能够有效地提高信道利用效率,改善网络吞吐量性能。
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| 关 键 词： | 无线网 介质访问控制(medium access control MAC)协议 饱和吞吐量 多接口多信道 动态信道分配 |
Saturation throughput analysis and optimal bandwidth adaptation for DCA protocols |
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| ZHOU Shuqiao,YUAN Ruixi.Saturation throughput analysis and optimal bandwidth adaptation for DCA protocols[J].Journal of Tsinghua University(Science and Technology),2012(1):31-35. |
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| Authors: | ZHOU Shuqiao YUAN Ruixi |
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| Institution: | (Tsinghua National Laboratory for Information Science and Technology,Department of Automation, Tsinghua University,Beijing 100084,China) |
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| Abstract: | Dynamic channel assignments(DCA) are a typical multi-radio multi-channel medium access control(MAC) protocol with a dedicated common control channel.The transmission characteristics of the control channel and data channels were used to develop a theoretical model to predict the DCA saturation throughput.The model accuracy was verified by simulations based on ns2.The model is then used to assign optimally channel bandwidths.Both the model results and simulations demonstrate that the scheme effectively increases the channel bandwidth utilization efficiency and improves the throughput. |
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| Keywords: | wireless networks medium access control(MAC) protocol saturation throughput multi-radio multi-channel dynamic channel assignment |
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