集成异构网络的嵌入式通信机软件系统设计

发布时间：2018-06-08 22:53

本文选题：异构网络 + 3G点对点通信　；参考：《天津大学》2014年硕士论文

【摘要】：数据传输在环境监测和防灾救灾中承担重要作用,远程数据传输需要长距离通信网络支持,并提供特殊条件下的应急通信保障,同时还需保障传输过程的可靠性和实时性。本文基于远程数据传输问题,设计和实现了一种多链路嵌入式通信机,该通信机通过集成以太网、3G蜂窝通信和北斗短报文服务,提供一种可靠的、适应性强的远程数据传输方法:在城市局部区域内采用无线以太网进行数据传输;在3G网络覆盖的区域,采用3G技术进行远程数据传输;在3G网路无法覆盖的区域或3G通信基站被干扰和破坏的区域,采用北斗短报文通信进行数据传输。在研究过程中,由于在WCDMA和TD-SCDMA制式下,3G终端设备拨号上网获得的IP地址是由GGSN(网关GPRS支持节点)分配的动态局域网地址,且国内三大3G运营商采用三种不同的通信协议,因而无法实现3G设备间的点对点通信。针对该问题,本文通过建立一个数据中转服务器进行存储转发,为3G发送方和接收方提供实时与非实时两种通信方式,实现了跨协议的3G设备间点对点通信;另外,针对北斗短报文通信的不可靠传输,本文提出一种基于确认反馈的丢包重发机制来提高北斗短报文传输的可靠性。本研究进行了大量的通信实验,实验结果验证了该嵌入式通信机设计的合理性以及传输数据的可靠性。
[Abstract]:Data transmission plays an important role in environmental monitoring and disaster prevention and relief. Remote data transmission needs the support of long distance communication network, and provides emergency communication support under special conditions. At the same time, it also needs to ensure the reliability and real-time of the transmission process. Based on the problem of remote data transmission, a multi-link embedded communication machine is designed and implemented in this paper. The communication machine provides a reliable method by integrating Ethernet 3G cellular communication and Beidou short message service. The method of remote data transmission with strong adaptability is as follows: wireless Ethernet is used for data transmission in the local area of the city, and 3G technology is used for remote data transmission in the area covered by 3G network. Beidou short message communication is used for data transmission in areas that can not be covered by 3G network or where 3G communication base stations are interfered and destroyed. In the research process, because the IP address obtained by the 3G terminal equipment dialing in WCDMA and TD-SCDMA system is the dynamic LAN address assigned by GGSN( Gateway GPRS support Node), and three kinds of different communication protocols are adopted by the three 3G operators in our country. Therefore, the point-to-point communication between 3G devices can not be realized. To solve this problem, this paper establishes a data transfer server to store and forward, provides real-time and non-real-time communication for 3G sender and receiver, and realizes point-to-point communication between 3G devices across protocols. Aiming at the unreliable transmission of Beidou short message communication, this paper proposes a packet loss retransmission mechanism based on confirmation feedback to improve the reliability of Beidou short message transmission. In this paper, a large number of communication experiments have been carried out, and the results show that the design of the embedded communication machine is reasonable and the reliability of the data transmission is verified.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN915.05

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