关键词: 物联网, 任务相关性, 任务调度, 调度顺序, 非周期任务

Abstract:

Unreasonable scheduling order will affect the execution time and real-time of the related task. Aiming at the complex relationship between IoT terminal tasks, this paper proposes a scheduling strategy using task relevance. This strategy designs a task model with the job polling group as the main body and establishes a priority factor matrix as the basis for task scheduling based on the deadline of task. For periodic task, the priority incremental matrix with the task relevance is generated to change the task priority dynamically for the real-time of predecessor task after each task is executed. For aperiodic task, this strategy constructs temporary job polling groups to preemptive scheduling. The experimental results show that this scheduling strategy can effectively reduce task execution time and shorten the response time of aperiodic task.

Key words: Internet of Things, task relevance, task scheduling, scheduling order, aperiodic task