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卫星所处的空间环境要求星载设备具有高可靠性,同时在硬件资源消耗方面也需要严格控制。针对星载设备的特殊要求,设计了一种应用于CIOQ交换结构、带有负载平衡和互连故障规避能力的级间调度技术,可提高系统的吞吐率和可靠性。改进的FIRM迭代匹配调度算法能在较短时间内完成一次迭代匹配调度过程,实现了高效的端口交换匹配。使用Xilinx xc7vx690t FPGA实现了完整的16×16的交换结构,其峰值吞吐率可达160 Gb/s,可满足星载交换机的系统设计需求。
The space environment in which satellites are located requires high reliability of spaceborne equipment and also requires tight control over hardware resource consumption. Aiming at the special requirements of spaceborne equipment, an inter-level scheduling technique for CIOQ switching fabric with load balancing and interconnection failure avoidance is designed to improve system throughput and reliability. The improved FIRM iterative matching and scheduling algorithm can complete an iterative matching and scheduling process in a relatively short time and achieve efficient port switching matching. The Xilinx xc7vx690t FPGA enables a complete 16 × 16 switching fabric with a peak throughput of 160 Gb / s to meet the system design needs of a spaceborne switch.