FC-AE-1553网络的“并发交换式”动态带宽调度机制

为提高航天航空网络传输性能，针对低轨空间舱内有效载荷系统的特点及有效载荷系统数据传输的要求，将空间有效载荷系统的数据分为周期性业务、突发性业务及强时效性业务3种业务类型，并综合分析3种业务特征，提出了一种可应用于FC-AE-1553网络的“并发交换式”动态带宽调度（DBA）机制，即突发性业务传输采用“并发交换式”的动态带宽分配，周期性业务采用静态固定带宽分配，强时效性业务采用抢占式带宽分配的方案。采用理论分析和仿真验证的方式分析了该调度机制的可行性，并通过OPNET仿真软件建立了FC-AE-1553网络仿真平台。结果表明，相比FC-AE-1553网络传统的“总线式”调度机制，所提机制可将FC-AE-1553网络的吞吐量提高10倍以上，且当网络节点数为32时，FC-AE-1553网络的吞吐量可从2.8 Gb/s提高到46 Gb/s，突发性业务的平均时延可降低1个数量级。 

Dynamic bandwidth allocation mechanism with parallel and switching for FC-AE-1553 network

In order to meet the requirement of space payload system and data transmission, the data business type was divided into periodic business, burst business and strong timeliness business. After the characteristics of the three kinds of business are analyzed, a scheme of dynamic bandwidth allocation(DBA) mechanism with parallel and switching for FC-AE-1553 network was proposed. The burst business used the periodical and concurrent dynamic bandwidth allocations, the periodic business used the static bandwidth allocation, and the strong timeliness business used the preemptive bandwidth allocation. An FC-AE-1553 network simulation platform was set up in OPNET Modeler. The performance of the system was analyzed based on both theoretical analysis and simulation approaches. The results show that compared with traditional DBA solutions of FC-AE-1553 network, the proposed mechanism increases the mean network throughput by over 10 times; FC-AE-1553 network throughput increases from 2.8 Gb/s to 46 Gb/s at 32 nodes; the mean time-delay of burst business decreases by one order of magnitude at 32 nodes.