动态卫星网络性能评估  

Dynamic Satellite Network Performance Evaluation

作　　者：刘凡[1] 邢艳玲[1] 葛宁[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《科学技术与工程》2013年第7期1805-1810,共6页Science Technology and Engineering

基　　金：国家自然科学基金(61132002)资助

摘　　要：为评估动态卫星网络性能,对现有卫星星座系统的设计和评估方法进行了研究。提出了使用网络最大流问题对动态卫星网络流量进行评估的方法。利用STK进行仿真,求得动态卫星网络的系统覆盖率、卫星对地仰角特性、系统间各节点建链时刻表。使用分段函数将动态卫星网络转化为网络多个状态的组合以求解网络的最大流。结果表明:网络最大流问题可有效评估动态卫星网络传输性能,动态卫星网络传输性能比单层卫星网络的传输性能高30倍以上。To evaluate the performance of dynamic satellite network, the typical framework of satellite constel- lation system is studied and proposed the method using network maximum flow problem to estimate dynamic satellite network capacity. STK is used to obtain the dynamic satellite network system coverage ratio, satellite elevation an- gle characteristics, and the schedules of the nodes building chains in the system. In order to obtain the maximum flow of satellite network, piecewise function is used to translate the dynamic satellite network into a series of static graph. The simulation results show that the theory of network maximum flow can effectively evaluate the transmis- sion performance of the dynamic satellite network. The transmission performance of dynamic satellite network can be 30 times or more than that of the single-layer satellite network.

关 键 词：动态卫星网络 网络最大流 性能评估 星座 分段函数 

分 类 号：TN927.3[电子电信—通信与信息系统]