中文摘要：

随着互联网技术和应用的不断发展,网络中的新技术、新业务层出不穷,网络的复杂度越来越高。传统的卫星网络已难以满足高吞吐量、灵活多变的业务需求。针对传统卫星网络中的问题,业界提出在卫星网络引入SDN技术,实现软件定义卫星网络SDSN。对现有SDN交换机的实现方式进行归纳总结,针对卫星网络特殊环境分析卫星结点中SDN星载交换设备的系统功能,并提出一种基于OpenFlow协议的SDN星载交换机实现方案。

英文摘要：

With the development of Internet technology and applications,new technologies and new services are emerging and networks are becoming ever more complex,and it has been more difficult for traditional satellite networks to meet the high throughput and flexible service requirements.To solve the problems in traditional satellite networks,the researchers from both academia and industry propose to introduce SDN technology into satellite networks to realize software defined satellite networks. The paper summarizes the implementation methods of existing SDN switches and analyzes the system function of SDN onboard switching model in satellite nodes.In addition,a scheme of SDN onboard switch based on OpenFlow protocol is proposed.