基于SDN的VDES卫星网络路由关键技术研究

发布时间：2018-07-10 02:39

本文选题：VDES + 软件定义网络　；参考：《电子科技大学》2017年硕士论文

【摘要】：甚高频数据交换系统(VHF Data Exchange System,VDES)是在水上移动业务领域中船舶自动识别系统(Automatic Identification System,AIS)上发展起来的新一代数字通信系统。VDES设计的目的是在实现全球范围内海事VHF移动波段基础上提供更高,更强的数据交换能力,实现船舶可向港口、海图信息中心等推送或者索取信息的功能。VDES为提高信息传输距离,使用卫星通信作为远距离信息传输方式。随着VDES业务种类的增加,不同业务又需要不同的QoS指标,而路由技术是决定数据在卫星网络传输路径的核心部分,其算法的优劣直接决定着整个通信系统的网络传输性能。首先,本文针对既有卫星网络控制架构固定、软件升级困难、不易更新网络配置信息等问题,引用软件定义网络技术,提出一种软件定义卫星网络架构,对卫星网络控制架构进行设计。该架构通过将控制功能和数据转发功能解耦合,使卫星节点仅含数据交换功能,而网络控制功能则通过专业控制器以软件的形式实现,从而降低了卫星节点的复杂度,同时实现业务的自动化部署,提高网络资源利用率。然后,本文针对既有卫星路由算法多以单一QoS目标作为优化点,而不能自适应满足多种不同业务传输质量需求的问题,并结合卫星网络的特点,以网络可用带宽、丢包率、链路时延为用户QoS优化目标,提出一种基于蚁群算法的多QoS目标路由算法。本文同时对蚁群算法所固有的收敛速度慢、易限于局部最优解等问题,基于软件定义网络技术,提出相应的改进策略。最后,本文设计了基于云平台资源管理技术、主机和网络虚拟化技术及软件定义网络技术,面向卫星网络的地面半实物仿真测试平台,以评估验证软件定义卫星网络下多QoS目标路由算法的性能。测试结果表明,本文提出的多QoS目标路由算法在多业务条件下能更好的满足不同用户需求。
[Abstract]:VHF data Exchange system VDES (VHF data Exchange system VDES) is a new generation of digital communication system (.VDES) developed on the Automatic Identification system (AIS) in the field of marine mobile service. The purpose of the design is to realize the maritime VHF mobile in the world. Band based on the provision of higher, Stronger data exchange ability to realize the function that ships can push or request information to ports, chart information centers, etc. In order to improve the distance of information transmission, satellite communication is used as the mode of long-distance information transmission. With the increase of VDES service types, different services need different QoS indicators, and routing technology is the core part that determines the transmission path of data in satellite network, and its algorithm directly determines the network transmission performance of the whole communication system. First of all, aiming at the problems of fixed satellite network control architecture, difficult software upgrade and difficult updating of network configuration information, this paper proposes a software defined satellite network architecture by using software definition network technology. The satellite network control architecture is designed. By decoupling the control function and the data forwarding function, the satellite node only includes the data exchange function, while the network control function is realized by software through the professional controller, thus reducing the complexity of the satellite node. At the same time, the automatic deployment of services is realized, and the utilization rate of network resources is improved. Then, this paper aims at the problem that the existing satellite routing algorithms take single QoS target as the optimization point, but can not adaptively meet the transmission quality requirements of many different services. Combined with the characteristics of satellite networks, the available bandwidth and packet loss rate of the network are used. Link delay is the goal of user QoS optimization. An ant colony algorithm based multi-QoS target routing algorithm is proposed. At the same time, for the problem of slow convergence speed and easy to be limited to the local optimal solution of ant colony algorithm, based on the software definition of network technology, this paper puts forward the corresponding improvement strategy. Finally, based on the cloud platform resource management technology, host and network virtualization technology and software definition network technology, the paper designs a ground-based hardware-in-the-loop test platform for satellite network. To evaluate the performance of multiple QoS target routing algorithms defined by verification software in satellite networks. The test results show that the proposed multi-QoS target routing algorithm can better meet the needs of different users under multi-service conditions.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN927.2

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