一种面向NTN横联自组织网络转发系统的研究
发布时间：2019-01-18 20:27
【摘要】：伴随着新一轮信息革命掀起的科技高潮,无线自组织网络作为一种新型无线网络通信技术自此得到了快速的发展,在军事、医疗、工业等各个领域都有着广泛的应用前景。由于无线自组织网络仅仅是近十年兴起的无线网络技术,它存在一些较为明显的不足之处,尤其是在传统单路径传输条件下,更容易出现网路故障,如网络吞吐量较低、传输时延较大、网络资源利用率低下、一旦链路出现故障就需要重新建立路由等问题。本文研究的NTN (Node-to-Node)横联远距离无线移动自组织网络是一种动态拓扑的对等网络,其终端设备能在远距离下进行无线通信,它是一组带有无线收发装置的移动节点组成的一个多跳的临时性的自治系统。在该网络拓扑中,两个不能直接通信的移动节点可以借助其它节点进行分组转发,以实现多信道多频点的数据通信。与其它移动通信网络相比,它不需要固定基站支持,具有网络易部署、广覆盖、自组性、多跳、分布式的无线信道等特点,主要用于协同移动通信、无线接入系统、应急通信。与无线自组织网络一样,NTN网络的节点之间是通过多跳数据转发机制进行数据交换,需要路由协议进行转发决策,且无线信道的不规则性变化,节点的移动、加入、退出等也会引起网络拓扑结构的动态变化。NTN网络转发系统的作用就是在这种环境下,监控网络拓扑结构变化,交互路由信息,产生、维护和选择路由,并根据选择的路由转发数据,提供网络的连通性。本文通过分析NTN网络与传统的无线网络,指出存在的优势及不足之处,并且在当前无线自组网路由协议的理想要求上,比较路由协议的常规问题来分析转发系统设计方案的特点,并从六个方面研究转发系统。结果表明,每个节点维护一张包含下一跳节点信息的路由表,能实现全网拓扑和二层转发表的学习、最短路径的计算、拓扑去环功能,同时实现业务报文在空口、LAN口、协议栈间的路由选择及管理功能,支持有线无线链路相互切换(两条链路同时存在时,业务数据优先走有线链路),最终NTN网络节点能在横联、远距离、无线、移动、自组织的条件下进行组网宽带通信。
[Abstract]:With the new wave of information revolution, wireless ad hoc network, as a new wireless network communication technology, has been rapidly developed since then, and has wide application prospects in military, medical, industrial and other fields. Since wireless ad hoc network is only a wireless network technology rising in recent ten years, it has some obvious shortcomings, especially in the traditional single-path transmission conditions, it is more prone to network failures, such as low network throughput. The transmission delay is large and the network resource utilization is low. Once the link fails, the routing needs to be re-established. The NTN (Node-to-Node) long distance wireless mobile ad hoc network studied in this paper is a kind of dynamic topology peer-to-peer network, and its terminal equipment can carry out wireless communication at a long distance. It is a multi-hop temporary autonomous system composed of mobile nodes with wireless transceiver. In this network topology, two mobile nodes which can not communicate directly can transmit packets with the help of other nodes to realize multi-channel and multi-frequency data communication. Compared with other mobile communication networks, it does not need fixed base station support, and has the characteristics of easy network deployment, wide coverage, self-organizing, multi-hop, distributed wireless channels, etc. It is mainly used for cooperative mobile communication, wireless access system and emergency communication. Like wireless ad hoc networks, the nodes of NTN network exchange data through multi-hop data forwarding mechanism, which requires routing protocol to make forwarding decisions, and the irregular change of wireless channel, the movement of nodes, and the addition of nodes. The function of NTN network forwarding system is to monitor the change of network topology, exchange routing information, generate, maintain and select routing in this environment. The network connectivity is provided according to the selected routing and forwarding data. By analyzing the NTN network and the traditional wireless network, this paper points out the advantages and disadvantages, and the ideal requirements of the current Ad Hoc routing protocol. This paper compares the general problems of routing protocols to analyze the characteristics of the design scheme of forwarding system, and studies the forwarding system from six aspects. The results show that each node maintains a routing table containing the next hop node information, which can realize the learning of the whole network topology and layer 2 forwarding table, the calculation of the shortest path, the function of topology de-loop, and the realization of the service message in the empty port and the LAN port. Protocol stack routing and management functions, support wired wireless links to switch (when two links exist at the same time, the service data priority to the wired link), the ultimate NTN network nodes in horizontal connection, long-distance, wireless, mobile, Self-organized broadband communication is carried out under the condition of self-organization.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.5
，
本文编号：2411082
[Abstract]:With the new wave of information revolution, wireless ad hoc network, as a new wireless network communication technology, has been rapidly developed since then, and has wide application prospects in military, medical, industrial and other fields. Since wireless ad hoc network is only a wireless network technology rising in recent ten years, it has some obvious shortcomings, especially in the traditional single-path transmission conditions, it is more prone to network failures, such as low network throughput. The transmission delay is large and the network resource utilization is low. Once the link fails, the routing needs to be re-established. The NTN (Node-to-Node) long distance wireless mobile ad hoc network studied in this paper is a kind of dynamic topology peer-to-peer network, and its terminal equipment can carry out wireless communication at a long distance. It is a multi-hop temporary autonomous system composed of mobile nodes with wireless transceiver. In this network topology, two mobile nodes which can not communicate directly can transmit packets with the help of other nodes to realize multi-channel and multi-frequency data communication. Compared with other mobile communication networks, it does not need fixed base station support, and has the characteristics of easy network deployment, wide coverage, self-organizing, multi-hop, distributed wireless channels, etc. It is mainly used for cooperative mobile communication, wireless access system and emergency communication. Like wireless ad hoc networks, the nodes of NTN network exchange data through multi-hop data forwarding mechanism, which requires routing protocol to make forwarding decisions, and the irregular change of wireless channel, the movement of nodes, and the addition of nodes. The function of NTN network forwarding system is to monitor the change of network topology, exchange routing information, generate, maintain and select routing in this environment. The network connectivity is provided according to the selected routing and forwarding data. By analyzing the NTN network and the traditional wireless network, this paper points out the advantages and disadvantages, and the ideal requirements of the current Ad Hoc routing protocol. This paper compares the general problems of routing protocols to analyze the characteristics of the design scheme of forwarding system, and studies the forwarding system from six aspects. The results show that each node maintains a routing table containing the next hop node information, which can realize the learning of the whole network topology and layer 2 forwarding table, the calculation of the shortest path, the function of topology de-loop, and the realization of the service message in the empty port and the LAN port. Protocol stack routing and management functions, support wired wireless links to switch (when two links exist at the same time, the service data priority to the wired link), the ultimate NTN network nodes in horizontal connection, long-distance, wireless, mobile, Self-organized broadband communication is carried out under the condition of self-organization.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.5
，
本文编号：2411082
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