Research For Wireless Sensor Networks Scheduling Mechanism Based On TinyOS

With the development and progress of computer communications technology, embedded computing and control technology, distributed technology and Wireless Sensor technology, etc. This technology promote the birth of Wireless Sensor Networks. Wireless Sensor Networks(Wireless sensor networks,WSN) as the most basic network access to and transmit information. Wireless Sensor Networks combine wireless sensor technology, wireless communication technology, networking and distributed technology.In today's world, more and more people concern and attend the Wireless Sensor Networks. Wireless Sensor Networks is the Sensor Network System that composed of many sensors interact each other. This network allows lots of sensor nodes can be reliable and effective communications, network nodes distributed in different places. The development of wireless sensor network will help The Internet of things ,etc to achieve cutting-edge scientific information in the perception of social activities, information exchange and intelligence capabilities to enhance the decision-making, thus enhancing overall system performance.Currently, the wireless sensor network research focuses on the following three aspects: Network communication protocols, power management, network localization algorithm. These three aspects of the study takes up the whole wireless sensor network to 80%. Wireless sensor networks operating system is the basic software environment of wireless sensor network node, Its flexibility, efficiency and real-time will directly affect the performance of the entire network, so the research and application of wireless sensor network node operating system has a very broad space and meaning. In the study of wireless sensor network node operating system, The research of scheduling mechaniam also has a very important research significance. Efficient scheduling mechanism can improve the response speed of the processor,system throughput, thereby improving the system's real time and reliability; In addition, the efficient scheduling mechanism can effectively reduce processor power consumption.This results mainly in two aspects:1.presents a wireless sensor networks multi-task scheduling algorithm. The TinyOS task scheduler is scheduling two additional events, so when the task or tasks to send more high frequency, the task queues will soon be filled, thus resulting in loss of other tasks, in addition to blocking the task may occur. Therefore propose a wireless sensor network operating system to multi-task scheduling algorithm to solve the above problem.2. Design and implementation of a wireless sensor networks communication experiment system.The experimental system simulation platform built by a wireless sensor network, so thatin the wireless sensor network nodes can communicate with each other, passing data.