中继卫星地面高速数据分发设备设计与性能分析

摘要

针对跟踪与数据中继卫星系统(TDRSS)的技术发展趋势及数据分发应用需求,分析了现有基于通用服务器的高速数据分发模式存在的问题及性能瓶颈,在此基础上提出了基于网络处理器的数据分发模式,并分析了其相比于服务器模式的优点.从硬件和软件两方面提出了基于专用网络芯片的高速数据分发设备的设计方案,给出三种高速数据分发方法,通过比较,选用最优方法.性能测试结果表明,基于专用网络处理器的数据分发模式相比于现有服务器数据分发模式性能提高200%.%In view of the technology development trend and the application need of data distribution of Tracking and Data Relay Satellite System(TDRSS),the problems and performance bottleneck of existing server-based high-speed data distribution mode are analyzed.The network processor-based data distribu-tion mode is given,whose advantages over server-based mode are studied.Then the hardware and software proposals of network processor-based high-speed data distribution equipment are proposed,while three high-speed data distribution methods are put forward.By comparing the three methods,the best one is cho-sen.Network CPU-based data distribution mode is 200% greater than the server-based distribution mode by performance testing comparison.