| 基于马尔科夫链的802.15.4协议MAC层数据包服务时间研究 |
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| 引用本文： | 程宏斌,孙霞,王晓喃,王海军,董瑞志.基于马尔科夫链的802.15.4协议MAC层数据包服务时间研究[J].计算机应用研究,2016,33(4). |
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| 作者姓名： | 程宏斌 孙霞 王晓喃 王海军 董瑞志 |
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| 作者单位： | 常熟理工学院计算机科学与工程学院 江苏 常熟,常熟理工学院计算机科学与工程学院 江苏 常熟,常熟理工学院计算机科学与工程学院 江苏 常熟,湖北第二师范学院计算机学院 湖北 武汉,常熟理工学院计算机科学与工程学院 江苏 常熟 |
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| 基金项目： | 国家自然科学基金(61202440)；江苏省自然科学基金（BK20141230）；湖北省教育厅科学技术研究计划指导性项目(B2014011)；常熟市科技计划项目(CS201308) |
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| 摘 要： | 针对802.15.4MAC层数据包平均服务时间优化问题，提出了一个基于超帧结构的节点状态转换机制，并分析了数据包服务时间定义，然后通过对节点状态的马尔科夫链建模，推导出网络主要状态的稳态概率和数据包服务时间的分析式；最后研究了参数NB、BE、SO对节点稳态概率数据包服务时间的影响。研究结果表明，与其它具有休眠的节点模型相比，数据包平均服务时间平均降低了2.3%。模型较好的描述了802.15.4网络节点的工作特点，且均衡的协议参数配置可以改善数据包的传输性能，为提高网络的实时性提供应用参考。
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| 关 键 词： | 数据包服务时间 节点状态 协议参数 马尔科夫链模型 |
| 收稿时间： | 2015/1/10 0:00:00 |
| 修稿时间： | 2016/2/21 0:00:00 |
Study on the data packet average service time in 802.15.4 MAC layer based on Markov chain |
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| CHENG Hong-bin,SUN Xi,Wang Xiao-nan,Wang Hai-jun and Dong Rui-zhi.Study on the data packet average service time in 802.15.4 MAC layer based on Markov chain[J].Application Research of Computers,2016,33(4). |
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| Authors: | CHENG Hong-bin SUN Xi Wang Xiao-nan Wang Hai-jun and Dong Rui-zhi |
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| Affiliation: | School of Computer Science and Engineering,Changshu Institute of Technology,School of Computer Science and Engineering,Changshu Institute of Technology,School of Computer Science and Engineering,Changshu Institute of Technology,School of Computer,Hubei University of Education,School of Computer Science and Engineering,Changshu Institute of Technology |
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| Abstract: | Aiming at the optimization problems of the data packet average service time of 802.15.4 MAC layer, this paper proposed a conversion mechanism of node state based on super frame structure, and analyzed the definition of the data packet average service time. After that, the steady-state probability of the main state and the formula of the data packet average service time were derived by establishing the model of Markov chain on the state of the node. At last, the paper researched the influence of the protocol parameters such as NB, BE, SO to the data packet service time of the steady-state probability. The research results show that, the data packet average service time is reduced by 2.3%, compared with other dormant node models. The model describes the working characteristics of 802.15.4 network nodes very well. The balanced configuration of protocol parameters could improve the packet transmission performance. And the model could provide the reference for raising the real-time performance of the network. |
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| Keywords: | data packet average service time node state protocol parameters Markov mode |
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