基于GNU Radio的IEEE802.11MAC协议的实现与研究

发布时间：2018-03-31 10:17

本文选题：无线网络　切入点：IEEE802.11　出处：《华南理工大学》2014年硕士论文

【摘要】：随着无线网络的影响力越来越大，针对无线网络的各种研究也更加的广泛和深入。目前，人们对于无线网络的研究手段主要还是通过仿真的方式进行。然而，通过仿真方式研究无线网络通信所得到的结果很多时候并不可靠。越来越多的研究人员希望能通过实际的无线电平台用实验的方式对无线网络进行研究，以得到更加可靠的数据。另一方面，在通信网络中，属于网络结构底层的标准，如物理层和数据链路层协议，通常都被固化在硬件当中实现，然而随着无线电设备性能的发展速度越来越快，底层协议中的很多规定也要随之进行升级和修改。相比于将协议固化在硬件之中，通过软件的方法直接对物理层和数据链路层协议进行控制能让研究人员更快更方便的对当前网络进行升级。所以，利用软件定义无线电的思想，在实际的网络平台上对无线通信进行研究也渐渐热门起来。本文提供了一个在基于GNU Radio软件定义无线电平台上搭建IEEE802.11标准MAC协议的方案，它利用软件无线电思想，使研究人员能直接通过代码对无线电通信的MAC协议进行控制。搭建的MAC协议实现了包括MAC帧的封装与解封装，数据传输，带有虚拟侦听功能的CSMA/CA竞争机制，RTS/CTS握手协议，，大型数据的分段与重组等主要的MAC层功能，在实验平台上搭建了一个以IEEE802.11标准为依据且功能完备的MAC层协议，本文还在MAC层协议之上为其添加应用，实现了文本传输功能。通过在实验平台上进行的测试，搭建的协议能够完成MAC层的基本功能并能为我们添加的上层应用提供服务。
[Abstract]:With the increasing influence of wireless network, the research on wireless network is more extensive and in-depth. At present, the research methods of wireless network are mainly carried out by simulation. However, The results obtained from the simulation of wireless network communication are often unreliable. More and more researchers hope to study the wireless network experimentally through the actual radio platform. On the other hand, in communication networks, standards that are at the bottom of the network structure, such as physical layer and data link layer protocols, are usually implemented in hardware. However, with the rapid development of radio equipment performance, many regulations in the underlying protocol should be upgraded and modified. Directly controlling physical layer and data link layer protocol by software method can make researchers upgrade the current network more quickly and conveniently. Therefore, the idea of software defined radio is used. The research on wireless communication on the actual network platform is becoming more and more popular. This paper provides a scheme to build IEEE802.11 standard MAC protocol based on GNU Radio software defined radio platform, which utilizes the idea of software radio. The constructed MAC protocol includes encapsulation and unencapsulation of MAC frame, data transmission, CSMA/CA competition mechanism with virtual listening function and RTS / CTS handshake protocol. The main functions of MAC layer, such as segmentation and recombination of large data, are used to build a fully functional MAC layer protocol based on IEEE802.11 standard on the experimental platform. This paper also adds applications to MAC layer protocol. Through testing on the experimental platform, the protocol can complete the basic functions of the MAC layer and provide services for the upper application we add.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN915.04

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