一种帧间相关的弱硬实时系统的分析与研究

随着嵌入式系统的发展，实时操作系统越来越受到人们的重视，实时操作系统的一个关键问题是实时调度问题，在研究弱硬实时系统的基础上提出了一种受弱硬实时限制的帧间相关周期模型．首先对该模型的调度性进行了分析与研究，得出了一些结论，然后提出了相应的基于双距离的优先级调度算法，该算法充分利用了帧间相关的特点来提高实时任务的可调度性，最后进行了总结与展望．

Analysis and Research of a Weakly Hard Real-Time System with Mutual Frames

With the embedded systems' development, real-time operating system (R T OS) is receiving increase attention. A key problem of real-time operating syste m s is real-time scheduling policy. Based on the research of weakly hard real-ti me system, this paper proposed a periodic weakly hard real-time model with mutual frames. Firstly, the paper analyzed the mode and gets some conclusions about th e schedulability of this model. For the model, proposed a dual-distances-base d priority (DDBP) which use the characteristic of mutual frames to improve the sch edulability of this model. In the end, the future research directions were discu ssed.