计算机科学 ›› 2022, Vol. 49 ›› Issue (9): 268-274.doi: 10.11896/jsjkx.210700220
郭鹏军, 张泾周, 杨远帆, 阳申湘
GUO Peng-jun, ZHANG Jing-zhou, YANG Yuan-fan, YANG Shen-xiang
摘要: 随着航空电子系统的快速发展,大量设备和传感器接入机内网络,这使得飞机机内通信网络的体系结构变得复杂而繁重。无线通信网络代替机内有线通信网络,能有效解决布线繁杂、重量大、线路故障检测困难等诸多问题。然而,无线网络在实时性、可靠性等方面仍有一定的限制,而这又恰恰是机载互连系统最关心的问题。对此,文中对现有的机内有线通信网络架构进行了分析,根据其通信特点设计了无线接入网络-有线骨干网络的混合通信网络架构;对候选的无线通信方案进行了评估和选取;将无线网络的接入固定时隙改进为按流量进行动态分配,建立了动态时隙分配问题的数学模型,设计了TDMA周期以及最优时隙分配策略;最后,一个典型的机载网络任务表明,在保证系统可调度的前提下,该策略可将网络利用率从36.5%提升到41.8%,验证了该方法的有效性。
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