基于水下无线传感器网络的AUV自组网关键技术研究
发布时间:2018-12-12 22:42
【摘要】:水下无线传感器网络集水声通信技术、传感器技术和网络技术于一身,在海洋环境探测领域具有极好的发展前景。但由于水声信道噪声高,传播速率低,衰减大等特点,使得在研究水下无线传感器网络过程中,困难比较多,一些已经成熟的陆上网络协议不能马上拿来应用于水下环境,需要对其进行研究修改,这对研究水下无线传感器网络提出了不小的挑战,并且大多数研究成果仍处于网络验证阶段。因此,如何将水下无线传感器网络与AUV更好的结合在一起,利用传感器网络实现一定规模的AUV自组织通信,目前还缺乏有效的技术手段。 本文研究了基于水下无线传感器网络的AUV自组网所涉及的一些关键技术和内容。提出了一种AUV自组网通信系统的合理解决方案,并对系统框架中的硬件平台、操作系统、协议栈和套接字接口部分分别进行了说明。系统研究了AUV自组网中MAC层协议,先是对MAC层中的基本知识和相关概念做了一个综述,然后对现在正在研究的一些MAC层协议做了详细的介绍,并且使用Aqua-sim水下网络仿真软件对部分协议做了仿真分析。 研究802.11DCF协议的过程中,在水下环境使用该协议时,不能非常精确的测定NAV(网络分配向量)的值,导致节点在竞争信道资源过程中产生了多余的时延,给网络性能带来了影响。为了获得更好的网络性能,,采用基于节点位置动态获得NAV值的方法,使得节点接入信道的过程更符合水下环境,提高了网络通信性能。
[Abstract]:Underwater wireless sensor networks (WSNs) have a promising future in the field of marine environmental detection because of their combination of underwater acoustic communication technology, sensor technology and network technology. However, due to the characteristics of high noise, low propagation rate and large attenuation of underwater acoustic channel, it is difficult to study underwater wireless sensor networks. Some mature terrestrial network protocols can not be applied to underwater environment immediately. It needs to be modified, which poses a great challenge to the research of underwater wireless sensor networks, and most of the research results are still in the network verification stage. Therefore, how to better combine underwater wireless sensor network with AUV to realize AUV self-organization communication on a certain scale is still lack of effective technical means. In this paper, some key technologies and contents of AUV ad hoc networks based on underwater wireless sensor networks are studied. A reasonable solution of AUV ad hoc network communication system is presented, and the hardware platform, operating system, protocol stack and socket interface in the system framework are explained respectively. In this paper, the MAC layer protocol in AUV Ad Hoc network is systematically studied. Firstly, the basic knowledge and related concepts in MAC layer are summarized, and then some MAC layer protocols which are being studied are introduced in detail. And some protocols are simulated and analyzed by Aqua-sim underwater network simulation software. In the process of studying 802.11DCF protocol, when the protocol is used in underwater environment, the value of NAV (Network assignment Vector) can not be measured accurately, which leads to the redundant delay in the process of competing for channel resources. Has brought the influence to the network performance. In order to obtain better network performance, the method of dynamically obtaining NAV value based on node location is adopted, which makes the process of node access to the channel more suitable for underwater environment and improves the network communication performance.
【学位授予单位】:中国海洋大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:TP212.9;TN929.5
本文编号:2375364
[Abstract]:Underwater wireless sensor networks (WSNs) have a promising future in the field of marine environmental detection because of their combination of underwater acoustic communication technology, sensor technology and network technology. However, due to the characteristics of high noise, low propagation rate and large attenuation of underwater acoustic channel, it is difficult to study underwater wireless sensor networks. Some mature terrestrial network protocols can not be applied to underwater environment immediately. It needs to be modified, which poses a great challenge to the research of underwater wireless sensor networks, and most of the research results are still in the network verification stage. Therefore, how to better combine underwater wireless sensor network with AUV to realize AUV self-organization communication on a certain scale is still lack of effective technical means. In this paper, some key technologies and contents of AUV ad hoc networks based on underwater wireless sensor networks are studied. A reasonable solution of AUV ad hoc network communication system is presented, and the hardware platform, operating system, protocol stack and socket interface in the system framework are explained respectively. In this paper, the MAC layer protocol in AUV Ad Hoc network is systematically studied. Firstly, the basic knowledge and related concepts in MAC layer are summarized, and then some MAC layer protocols which are being studied are introduced in detail. And some protocols are simulated and analyzed by Aqua-sim underwater network simulation software. In the process of studying 802.11DCF protocol, when the protocol is used in underwater environment, the value of NAV (Network assignment Vector) can not be measured accurately, which leads to the redundant delay in the process of competing for channel resources. Has brought the influence to the network performance. In order to obtain better network performance, the method of dynamically obtaining NAV value based on node location is adopted, which makes the process of node access to the channel more suitable for underwater environment and improves the network communication performance.
【学位授予单位】:中国海洋大学
【学位级别】:硕士
【学位授予年份】:2014
【分类号】:TP212.9;TN929.5
【参考文献】
相关期刊论文 前1条
1 Warren Webb;;小型计算机成为嵌入式系统的宝藏[J];电子设计技术;2006年12期
相关博士学位论文 前1条
1 丛艳平;多模式自适应水下无线通信网络关键技术研究[D];中国海洋大学;2011年
本文编号:2375364
本文链接:https://www.wllwen.com/kejilunwen/wltx/2375364.html