星载电路分组混合交换技术研究

发布时间：2018-03-01 05:30

本文关键词： 星上交换电路交换分组交换混合交换　出处：《西安电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：卫星通信以其覆盖范围广,良好的广播能力,不受各种地域条件限制等优点,使其在无线通信中发挥着重要作用。随着不断增长的宽带多媒体业务和大容量需求,以宽带和高速为主要特征的宽带卫星网,成为卫星通信发展的主流。卫星通信系统在网络拓扑、链路特性、终端移动性、路由和寻址等方面都有其自身的特点,卫星上的有效载荷,不可避免的受到电磁干扰、资源受限、功耗等问题的制约。因此星上交换不同于传统的地面交换,要受到一系列的限制。针对这一问题,本论文提出了一种分组和电路的混合交换方案,并对其中的关键技术进行了研究。本论文的研究内容就是在星载环境下系统的交换体制以及星载交换机的设计实现。本文主要内容如下：首先在介绍国内外卫星通信系统星上交换技术的发展趋势,及其星上交换体制、协议构架等关键技术的基础上,开展了星上分组交换与电路交换的性能及适应性研究；设计出一种分组电路混合交换体制,并通过工程验证了其合理性。同时,为确保数据的高效转发,设计了基于流水线方式的数据的处理方法,并采用共享缓存的方式进行数据的存储。在已取得研究成果的基础上,对交换机进行了功能划分,提出了一个星载交换机的原型系统方案。着重设计了交换链路层与上层网络层、下层物理层之间的接口。将该星载交换机功能换分为输入处理、接收调度、流分类、队列管理、发送控制、输出处理、流量控制等模块。使用硬件描述语言对上述模块进行了设计和实现。论文所设计星载交换机原型系统经过测试,达到系统要求。论文最后对全文进行了总结,并对与论文研究方向相关的领域进行了展望。
[Abstract]:Satellite communication plays an important role in wireless communication because of its advantages of wide coverage, good broadcasting capability and no limitation of various geographical conditions. With the increasing broadband multimedia service and large capacity demand, satellite communication plays an important role in wireless communication. Broadband satellite network, which is characterized by broadband and high-speed, has become the mainstream of satellite communication development. Satellite communication system has its own characteristics in network topology, link characteristics, terminal mobility, routing and addressing, etc. The payload on the satellite is inevitably restricted by electromagnetic interference, limited resources, power consumption and so on. Therefore, the on-board exchange is different from the traditional ground exchange and is subject to a series of restrictions. In this paper, a hybrid switching scheme for packet and circuit is proposed. The main contents of this paper are as follows: firstly, the research content of this thesis is the design and realization of the system switching system and the spaceborne switch in the spaceborne environment. The main contents of this paper are as follows: firstly, the domestic and foreign satellites are introduced. The trend of on-board switching technology in communication systems, Based on the key technologies of on-board switching and protocol architecture, the performance and adaptability of on-board packet switching and circuit switching are studied, and a hybrid switching scheme for packet circuits is designed. At the same time, in order to ensure the efficient transmission of data, the data processing method based on pipeline mode is designed, and the data storage is carried out by means of shared cache. In this paper, the functions of the switch are divided, and a prototype system scheme of the on-board switch is proposed. The interface between the switching link layer, the upper network layer and the lower physical layer is designed, and the function of the on-board switch is divided into input processing. Receiving scheduling, flow classification, queue management, transmission control, output processing, flow control and other modules are designed and implemented using hardware description language. Finally, the paper summarizes the whole paper and looks forward to the related fields.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN927.2

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