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与传统的商业网络不同,航空机载波分复用网络要求强实时性以保证消息的传输性能。实时调度算法是保证机载网络中消息传输性能的关键。针对机载波分复用网络的实时性要求,采用实时通信中的周期性任务模型,提出了满足机载波分复用网络实时性要求的加权轮转调度算法,其中轮转周期的选择、权值匹配方法和多信道分配方法是影响调度算法参数设计的重要过程。通过多信道分配方法有效减少了消息拆分次数;结合实例比较确定了算法中消息分配权值的计算方法;并指出了最优轮转周期无法保证最小的消息延迟时间率。研究结果对机载波分复用网络的工程设计与优化有一定的指导意义。
Different from the traditional commercial network, the aircraft carrier wave division multiplexing network requires strong real-time nature to ensure the transmission performance of the message. Real-time scheduling algorithm is the key to guarantee the message transmission performance in airborne network. In order to meet the real-time requirements of carrier-based WDM networks, we propose a weighted round robin scheduling algorithm that meets the real-time requirements of carrier-based WDM networks by using the periodic task model in real-time communication. The round-robin scheduling and weight matching And multi-channel assignment method is an important process that affects the parameter design of scheduling algorithm. The multi-channel assignment method can effectively reduce the number of message splitting times. The calculation method of message distribution weight is determined by comparison with the example. It is pointed out that the optimal message cycle can not guarantee the minimum message delay time rate. The research results have certain guiding significance for the engineering design and optimization of airborne WDM network.