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提出一种新型的端系统虚链路调度(VL)策略,该策略在短帧优先基础上结合权重轮询(WRR)进行调度,既确保了重要短帧的优先级又可以平衡其他不同优先级信号的延迟上限。应用网络演算理论推导了基于该新型调度策略的端系统不同虚链路的延迟上界,研究了最大延迟上界与不同权重比及其帧长之间的关系,并建立了基于OPNET的航空电子全双工交换式以太网(AFDX)网络模型,仿真分析新型调度策略与短帧优先、带权重轮询调度算法下端系统数据的发送延迟。结果表明,该新型调度策略有效可行,降低了短帧虚链路的最大延迟时间,提高了长帧数据中较重要任务数据的处理带宽,适用于具有较多重要短帧并具有不同优先级数据的机载系统网络。
This paper proposes a new type of end-system virtual link scheduling (VL) strategy. This strategy is based on the short frame priority combined with WRR, which not only ensures the priority of important short frames but also balances other priority Signal delay limit. Based on this new scheduling strategy, the upper bound of delay of different virtual links in the end system is deduced. The relationship between the upper bound of maximum delay and different weight ratios and its frame length is studied. And based on OPNET, Full-duplex switched Ethernet (AFDX) network model to simulate the transmission delay of the lower system data of the new scheduling strategy and the short-frame first scheduling algorithm with weighted polling. The results show that the new scheduling strategy is effective and feasible, reduces the maximum delay time of the short-frame virtual link, and increases the processing bandwidth of the more important task data in the long-frame data. It is suitable for data with more important short frames and different priorities Airborne System Network.