eNB蜂窝小区盲点分析及传播模型研究

发布时间：2018-06-27 08:28

本文选题：图像分割 + eNB　；参考：《郑州大学》2017年硕士论文

【摘要】：近年来,伴随着4G的快速发展,相应的4G用户数量也在快速增长。为了满足如此之多的用户需求,4G基站eNB的建设需求也就随之而来。随着城市的飞速发展,建筑物的数量以及高度也在逐渐增加。当建筑物已经阻挡到无线信号传播时,这时候盲点就产生了。而想判断建筑物高度是否对信号传播造成影响,就必须要进行相应的盲点分析。当蜂窝小区出现盲点之后,网优人员就要进行相应的无线网络优化。早期网优人员都是通过去实地考察场景信息等人工的方式去收集信息数据。本文通过基于图像分割的盲点分析希望可以为实现数据的自动化收集与处理提供理论性支持。当收集的数据判断出建筑物高度已经影响到无线信号的传播时,就可以通知相应网优来进行无线网络优化或建设新的基站。而如果想进行无线网络优化,就必须进行在特定覆盖场景下的相关传播模型的研究,然后对链路预算进行预估,估算出覆盖区域,从而实现最佳的网络优化。本文以FDD-LTE为基础,基于蜂窝小区进行讨论其建筑物高度对路径损耗的影响。首先通过对图像分割技术来进行盲点分析,通过图像分割技术可以得到建筑物的轮廓,进而通过灰度直方图的方式来比较建筑物高度是否发生了变化。接下来对于微蜂窝小区及电波传播理论等相关概念进行了介绍。通过菲涅尔余隙理论得出建筑物高度与绕射损耗的关系。然后对WIM模型进行了详细介绍以及仿真,并且对WIM模型进行简化。最后介绍了宏蜂窝小区的相关传播模型,然后对两种Hata模型进行了在不同覆盖场景下的相关的仿真并得出结论。接下来基于FDD-LTE进行了上行链路预算分析讨论,通过COST231-Hata模型预估出覆盖区域。希望通过本篇论文对无线网络优化以及基站的建设提供理论性的指导以及建议。
[Abstract]:In recent years, with the rapid development of 4G, the number of 4G users is also growing rapidly. In order to meet the needs of so many users, the construction needs of 4G base station eNB will follow. With the rapid development of cities, the number and height of buildings are gradually increasing. Blind spots occur when the building has blocked the transmission of wireless signals. In order to judge whether the height of the building has an effect on the signal propagation, it is necessary to carry out blind spot analysis. When the blind spot appears in the cellular area, the network optimizer will carry on the corresponding wireless network optimization. In the early days, the best people collected information by visiting scene information and other artificial methods. Through blind spot analysis based on image segmentation, this paper hopes to provide theoretical support for automatic data collection and processing. When the collected data determine that the height of the building has affected the propagation of the wireless signal, the corresponding network optimization can be notified to optimize the wireless network or to build a new base station. If we want to optimize the wireless network, we must study the related propagation model in the specific coverage scenario, then estimate the link budget and estimate the coverage area, so as to achieve the best network optimization. Based on FDD-LTE, the influence of building height on path loss is discussed in this paper. Firstly, the blind spot analysis of image segmentation technology can be used to get the contour of the building, and then the height of the building can be compared by the gray histogram. Then the concepts of microcellular cell and radio wave propagation theory are introduced. The relationship between building height and diffraction loss is obtained by Fresnel clearance theory. Then the WIM model is introduced and simulated in detail, and the WIM model is simplified. Finally, the correlation propagation model of macrocellular cell is introduced, and then two Hata models are simulated under different coverage scenarios and the conclusions are drawn. Then the uplink budget is analyzed based on FDD-LTE and the coverage area is estimated by COST231-Hata model. This paper hopes to provide theoretical guidance and suggestions for wireless network optimization and base station construction.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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