Sensor network embedded operation system based on priority scheduling

Abstract

A sensor network embedded operation system based on the priority scheduling belongs to the technical field of wireless sensor network, and comprises a task priority setting interface module, a task scheduling configuration assembly module, and a priority-based task scheduling module, wherein the task priority setting interface module is connected with an application program and transmits the taskpriority information; the task scheduling configuration assembly module is connected with a system kernel and transmits the task scheduling information; and the priority-based task scheduling module is connected with the task scheduling configuration module and transmits the task priority scheduling information. By adopting a priority-based multi-task preemptible scheduling strategy for kernel scheduling, the system can provide a priority scheduling interface for the application program, and can assign a priority to the task before the task is added to a queue. Therefore, the system can schedule the tasks according to the assigned priority, and the task with higher priority is executed firstly and then is added to the queue.

Description

technical field [0001] The invention relates to a system in the technical field of wireless sensor networks, in particular to a sensor network embedded operating system based on priority scheduling. Background technique [0002] Among the existing multiple operating systems for wireless sensor networks, TinyOS is the most widely used, paper number DOI: 10.1007 / 3-540-27139-2_7, public date: 2005, TinyOS: An Operating System for Sensor Networks (micro operating system : an operating system for sensor networks). It is an open source lightweight embedded operating system, which is characterized by small size, highly modular structure, component-based architecture, and fast application to various applications. TinyOS internally uses a circular queue to maintain the task list. The TinyOS scheduling model has the following characteristics (1) Tasks run to the end in a single thread, and only a single task stack is allocated. (2) There is no concept of process management, and tas...

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Problems solved by technology

[0004] (1) Overload, when the tasks to be processed on the node exceed the processing capacity of the node, overload occurs, the reason is that the node density is too large, the frequency of interruption events is too high, etc. (2) the task is lost, the reason is the local task frequency Too high or there are many tasks (3) There is a decrease in communication throughput, such as a task causing blockage or abnormality, which affects the execution of other tasks 4) Poor real-time performance

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