摘要
为飞机等交通工具内的用户提供基于卫星的不间断IP连接,并在卫星星座网络内实现IP路由选择功能,是未来LEO卫星星座通信网络需要解决的关键问题。提出了基于移动式网络技术的LEO卫星星座通信网络体系结构,实现了卫星星座通信网络中的IP路由选择功能,并降低了对地面网路的依赖,实现了对用户段网络随时随地的连接支持。在对卫星星座通信网络中的星地切换模式进行分析的基础上,提出了一种基于虚拟移动路由器的快速星地切换和认证方法。通过NS2仿真试验,给出了新型LEO卫星星座通信网络的传输延迟特性以及快速切换方法的仿真试验结果。仿真试验表明,提出的网络结构是满足未来卫星星座发展需求的,星地间的切换是低时延的。
Providing uninterrupted IP connection based on satellites for the users in the vehicles, such as airplanes, and realizing the IP routing function in the satellite constellation network are the key questions which the future LEO satellite constellation network will need to solve. This paper proposed the LEO satellite constellation network system structure based on the mobile network technology in order to meet the needs of the future satellite constellation communication network, which realized the IP route selection function, reduced the dependence of satellite constellation communication network to the ground network and provided the access connection for the user segment networks from ＂anywhere＂ at ＂anytime＂. Based on the analysis of the handoff model between satellite and ground in satellite constellation network, this paper proposed a fast handoff and authentication method based on VMR, and presented the NS2 simulation result of the network transmit delay performance and the fast handoff method on the novel LEO satellite constellation networks. The simulation experiment indicates that, this proposed network structure can meet the development need of the future satellite constellation, and the handoff is low delay.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2007年第1期103-107,共5页
Journal of Astronautics
基金
国防预研项目(41329080101)
国家自然科学基金项目(60372039)
关键词
卫星星座通信网络
移动式网络
体系结构
切换
仿真
Satellite constellation communication networks
Mobile network
Architecture
Handoff
Emulation
