超短波通信协议MAC层控制帧解析及退避算法仿真

发布时间：2018-02-10 17:45

本文关键词： 超短波自组织网络 MIL-STD-188-220C 控制帧退避算法　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：现今社会随着无固定设施网络条件下人们对于网络通信的需求逐渐增加,对这种能够随时组网的自组织网络系统进行更加深入的开发。自组织网络系统和终端基于摒弃了固定设施的有线网络模式,对其进行了开发和创新,并且自组织网络为通信网络系统的抗干扰终端做出了巨大贡献。它已经完全取代了传统网络设施,作为新时代的通信计算机网络通信系统建设的基础性研究。自组织无线网络通信系统因为其优秀的自组织、网络自我修复功能及其抗毁坏能力在国防领域有着非比寻常的重要研究价值。现代抗干扰上能够随处看到自组织无线网络的身影,同时结合超短波优秀的传输能力,超短波自组织网络已经被各个国家的国防科研所采纳。本文所要研究的超短波自组织无线网络,无论在民用还是国防领域均发挥着巨大的作用,对该网络的网络协议特点我们将会在文章中进行深入的分析。本文从无线网络的起源开始,介绍了无线网络的发展情况和应用背景,同时介绍了超短波自组织网络在各个领域的应用情况。然后简单叙述了超短波自组织网络的相关特点,例如:自动组网功能、动态型拓扑、网络独有的组网结构等等。接下来分析了该网络中网络通信协议方面的问题,对MAC(媒体接入控制技术)层的几种常用协议做出了介绍,选择了一种常用的协议对其控制帧进行了解析,并通过实际数据包测试,验证了解析方案。接下来我们对美国通信网络所采用的220C协议的MAC层进行了研究,对其MAC层的帧类型、格式、各个信道访问过程及避免冲突的退避算法进行了详细的分析。并对MAC层的数据帧提出了解析方案,通过对220C数据包的解析对解析方案进行了验证。通过OPNET仿真平台建立了包括Aloha、CSMA、220C的RNAD和DNAD算法在内的四种MAC访问退避机制。分析了仿真结果和各个退避算法的优缺点。并提出了一种改进的220C的RNAD算法。通过仿真,验证该改进后算法对网络性能的提升。为后续的研究提供了一定的参考。
[Abstract]:Nowadays, with the increasing demand for network communication in the absence of fixed network, This kind of ad hoc network system, which can organize network at any time, has been further developed. The ad hoc network system and terminal have been developed and innovated based on the wired network mode of fixed facilities. And the self-organizing network has made a great contribution to the anti-jamming terminal of the communication network system. It has completely replaced the traditional network facilities. As the basic research of the construction of communication computer network communication system in the new era, the self-organizing wireless network communication system is due to its excellent self-organization. The self-repairing function of the network and its ability to resist damage are of great importance in the field of national defense. In modern anti-jamming, the self-organized wireless network can be seen everywhere, and combined with the excellent transmission capability of ultrashort wave. Ultrashort wave ad hoc networks have been adopted by national defense research institutes in various countries. The ultra-short wave ad hoc wireless networks studied in this paper play a great role in both civil and national defense fields. We will deeply analyze the characteristics of the network protocol in this paper. This paper begins with the origin of wireless network and introduces the development and application background of wireless network. At the same time, the application of ultrashort wave ad hoc network in various fields is introduced, and then the related features of ultrashort wave ad hoc network are briefly described, such as automatic networking function, dynamic topology, etc. The unique network structure and so on. Next, the paper analyzes the problems of network communication protocols in the network, and introduces several common protocols in the MAC (Media access Control Technology) layer. This paper selects a common protocol to parse the control frame, and verifies the resolution scheme by testing the actual data packet. Then, we study the MAC layer of 220C protocol used in American communication network, and the frame type of its MAC layer. Format, channel access process and collision avoidance algorithm are analyzed in detail, and the resolution scheme of data frames in MAC layer is proposed. The parse of 220C data packet is verified. Four kinds of MAC access Backoff mechanisms, including RNAD and DNAD algorithms of Aloha-CSMA-220C, are established on the OPNET simulation platform. The simulation results and the advantages and disadvantages of each Backoff algorithm are analyzed. An improved 220C RNAD algorithm is proposed. The improved algorithm is proved to improve the network performance and provide a reference for further research.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925

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