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清华大学学报(自然科学版)  2015, Vol. 55 Issue (5): 565-571    
  计算机科学与技术 本期目录 | 过刊浏览 | 高级检索 |
基于IEEE 802.15.4的星形拓扑无线传感器网络性能分析
蔡劼, 顾明
清华大学 计算机科学与技术系, 北京 100084
Performance analysis of star topology wireless sensor networks based on IEEE 802.15.4
CAI Jie, GU Ming
Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China
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摘要 网络性能分析是无线传感器网络中的关键问题之一。该文对基于IEEE 802.15.4标准的星形拓扑无线传感器网络性能进行分析。针对无线信道衰落所导致的隐藏终端问题, 分析了传感器节点之间数据冲突的概率, 并在此基础上运用理论分析的方法, 推导了网络的收包率、 平均延迟和平均能耗的这3个性能指标的理论表达式, 并通过仿真实验进行验证。实验结果表明理论结果与仿真结果误差小于5%, 证明了理论表达式的正确性和准确性。
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蔡劼
顾明
关键词 无线传感器网络信道衰落隐藏终端性能分析    
Abstract:Performance analyzes are difficult in wireless sensor networks (WSNs). This study analyzes the performance of a star topology WSN based on the IEEE 802.15.4 standard. The probability of data collision is analyzed for the hidden terminal problem caused by channel fading. Then, the model is used to derive the packet reception rate (PRR), the average delay and the average energy consumption. Simulation results are within 5% of the theoretical results which validate the correctness and accuracy of the theoretical expressions.
Key wordswireless sensor networks    channel fading    hidden terminal    performance analysis
收稿日期: 2015-05-04      出版日期: 2015-08-04
ZTFLH:  TP393.1  
通讯作者: 顾明,教授,E-mail:guming@tsinghua.edu.cn     E-mail: guming@tsinghua.edu.cn
引用本文:   
蔡劼, 顾明. 基于IEEE 802.15.4的星形拓扑无线传感器网络性能分析[J]. 清华大学学报(自然科学版), 2015, 55(5): 565-571.
CAI Jie, GU Ming. Performance analysis of star topology wireless sensor networks based on IEEE 802.15.4. Journal of Tsinghua University(Science and Technology), 2015, 55(5): 565-571.
链接本文:  
http://jst.tsinghuajournals.com/CN/  或          http://jst.tsinghuajournals.com/CN/Y2015/V55/I5/565
  图1 星形拓扑无线传感器网络
  图2 时隙CSMA/CA 机制的Markov链模型
  图3 节点执行CCA 侦测到信道繁忙示意图
  图4 数据冲突情况1
  图5 数据冲突情况2
  表1 主要实验参数
  图6 网络收包率随节点数目的变化
  图7 数据平均延迟随节点数目的变化
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