随着卫星激光通信技术的发展，激光链路中继卫星系统将成为未来天基信息系统的骨干网。首先设计了一种“2颗国土星+2颗境外星”的网络架构，然后借助地面程控交换技术分析方法，定义了光网络性能指标，最后仿真了激光链路中继卫星系统的网络性能。仿真结果表明，当每颗用户卫星通信业务量为0.2 Erl、接入损失概率要求不大于0.2、链路利用率不小于0.6的情况下，激光链路中继卫星系统的12条接入链路可以支持50颗用户卫星接入。

With the development of satellite laser communication technology, data-relay satellite system using optical links will become the backbone of space-based information system in the future. At first, a network architecture of "2 territorial stars +2 overseas stars" was designed, then the optical satellite network performance indexes were defined based on the analysis method of SPC exchange(stored program control exchange), and lastly the performance of data-relay satellite system using optical links was simulated. The simulation results show that data-relay satellite system using 12 optical links can support 50 user satellites, when each user satellite communication traffic is 0.2 Erl, access loss probability is greater than 0.2, and link utilization is greater than 0.6.