基于凸优化的无线体域网能效分析

发布时间：2018-03-18 06:10

本文选题：无线体域网　切入点：自动请求重传　出处：《烟台大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着当代科技进步和社会发展,人们的医疗健康显得尤为重要,作为医疗健康监护的一种重要应用,无线体域网不仅可以服务于人们的健康,还可以缓解现今医院拥挤无法及时诊疗的问题,这就促使无线体域网拥有较大的研究意义和发展空间。无线体域网是以人体为中心,由依附在人体上的传感器节点和控制节点构成,其中传感器节点用于采集各种相关的生理信号。由于附着在人体上的各传感器节点所处环境的复杂性,使得无线体域网传输的可靠性和能效会受到各种因素的制约,因此关于无线体域网的能效优化成为亟待解决的关键问题。本文将主要围绕能量受限的无线体域网展开讨论,在ARQ、FEC差错控制技术应用于无线体域网的研究基础上,依据能效的定义从能效优化的角度出发,对WBAN能效的数学模型进行求解,实现资源的优化分配。本文进行的主要工作如下:第一,对WBAN的网络结构和系统模型进行分析,依据差错控制技术对无线体域网的重要意义,对该领域的相关国内外文献做出总结。对凸优化理论和CVX求解工具进行了分析,对凸优化中的几何规划问题等凸优化理论进行继续研究,并归纳总结了几种求解凸优化问题的典型方法。第二,分析关于两种差错控制技术,一种是自动请求重传(ARQ)技术,另一种是前向纠错(FEC)技术,研究在WBAN传输数据过程中,基于ARQ和FEC技术的网络能效。结合WBAN中两种独立的差错技术相应的数学能效模型,分析是否为凸优化问题或是否可以转换为凸优化问题,如果为凸优化问题则该数学模型存在最优解,可以使能效达到最优。第三,在不同差错控制技术下,分析数据包长、通信距离、信噪比等参数对能效的影响,利用凸优化理论及求解方法,仿真得出各差错控制技术下能效最优点,实现资源的优化分配。分别在ARQ和FEC两种技术下改变信噪比和通信距离,分析研究能否实现差错控制的自适应。
[Abstract]:With the progress of modern science and technology and social development, people's medical health is particularly important. As an important application of medical and health monitoring, wireless body area network can not only serve people's health. It can also alleviate the problem that hospital congestion can not be diagnosed and treated in time, which makes wireless body area network have great research significance and development space. Wireless body area network is centered on human body. The sensor nodes are composed of sensor nodes attached to the human body and control nodes, in which sensor nodes are used to collect various related physiological signals. Due to the complexity of the environment of each sensor node attached to the human body, The reliability and energy efficiency of wireless body area network transmission will be restricted by various factors. Therefore, the optimization of wireless body area network energy efficiency becomes a key problem to be solved. On the basis of the application of ARQFEC error control technology to wireless body area network, according to the definition of energy efficiency, the mathematical model of WBAN energy efficiency is solved from the point of view of energy efficiency optimization. The main work of this paper is as follows: first, the network structure and system model of WBAN are analyzed, and the significance of error control technology to wireless body area network is discussed. The convex optimization theory and CVX solution tool are analyzed, and the convex optimization theory such as geometric programming in convex optimization is studied. Several typical methods for solving convex optimization problems are summarized. Secondly, two kinds of error control techniques are analyzed, one is automatic request retransmission (ARQ) technology, the other is forward error correction (FEC) technology. Network energy efficiency based on ARQ and FEC technology. Combined with the corresponding mathematical energy efficiency model of two independent error technologies in WBAN, this paper analyzes whether the problem is convex optimization problem or whether it can be converted into convex optimization problem. If it is a convex optimization problem, the mathematical model has an optimal solution, which can make the energy efficiency optimal. Thirdly, under different error control techniques, the effects of data packet length, communication distance, signal-to-noise ratio and other parameters on energy efficiency are analyzed. By using convex optimization theory and solution method, the optimal energy efficiency of each error control technology is obtained by simulation, and the optimal allocation of resources is realized. The signal-to-noise ratio (SNR) and communication distance are changed under ARQ and FEC, respectively. This paper analyzes whether the adaptive error control can be realized.
【学位授予单位】：烟台大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN92;TP212.9

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