一种星地一体的高速星载标签交换机流量控制机制的设计与仿真

摘要

To optimize the design of high capacity satellite on board label switches,a new flow control mechanism and a new satellite on board switch structure are proposed.According to the buffer utilization of different input ports of on board switch,the terrestrial network gates can adjust the scheduling weights of output for different down ports of satellite on board switch to avoid buffer overflow.The relationship of buffer depth,adjustment threshold of on board switch and the scheduling weights in terrestrial gates are simulated with NS2 under the condition of long propagation delay,which will be helpful to the design of high-throughput on board label switches and the design of terrestrial network.%为了优化大容量星载交换机的设计,提出了一种星载标签交换技术体制,针对该体制建立了星地一体化卫星网络的队列模型和流量控制机制,根据星载交换机存储资源使用状态调整地面网络设备队列调度权重,降低星载交换机存储资源使用量和丢包率.使用NS2软件仿真分析了长延迟条件下星上缓存队列阈值、星上缓存区容量、地面设备队列调度权重之间的关系.为星载标签交换机和星地一体化网络的设计提供了参考依据.