Research Of Multichannel Scheduling Algorithm For Industrial Application In Wireless Sensor Networks

Wireless sensor network is an IT hotspot technology—will have a significantimpact on human life21century—which is one of the important fields of application onIndustrial. Industrial wireless network technology is an emerging wireless networktechnology, which caters for information exchange between devices, and is designed forharsh industrial field environment. It is the application expansion and technologyinnovation of wireless technology. Industrial Wireless Sensor Networks (IWSNs) havemany advantages, such as low-cost, easy-use, and easy-maintenance. Therefore, IWSNsbecome a revolutionary technology; it could reduce the cost of industrial monitoring&control systems and extend the application scopes. Complex industrial environment andother factors and the development of modern industrial proposed more stringentrequirements on real-time and reliability of industrial wireless networks.Transmission scheduling is a key approach to meet industrial applicationrequirements, because it can solves the problem how to effectively utilize wirelesscommunication resources reasonably and effectively. It brings higher challenges foradaptive transmission scheduling because of some uncertain features, such as dynamicchannel conditions, and the change of topology and route. All these mentioned factorsabove limit the use of existing methods and increase difficulties of analysis andsolutions.In this thesis, on the basis of a detail summary of industrial wireless sensornetworks, transmission scheduling, analyzing the feature of topology structure and thelower bounds of timeslots and channels, algorithm design of transmission schedulingare studied for special topology structure, the main contributes are as follows:1. We summarize and analyze the concept, features and technical requirements ofindustrial wireless sensor networks; the characteristics, classification, currentresearch of wireless sensor network transmission scheduling problem aresummarized systematically, and the existing problems and future research prioritiesare pointed out. We focus on the characteristics of multi-channel transmission scheduling. By analyzing the characteristics of wireless sensor network topology,we demonstrate the necessity and feasibility of in special topology schedulingalgorithm research and implementation of wireless sensor networks.2. WIA-PA networks as an example, required lower bounds of the number of slots andthe number of channels are researched in the mesh-star hybrid topology wirelesssensor networks to complete transmission scheduling for real-time requirements incommunications of industrial wireless sensor networks. Based on the theoreticalanalysis of the lower limit, we propose a multi-channel transmission schedulingalgorithm with strong targeted for mesh-star hybrid topology networks, which hasthe characteristics of low complexity and easy to implement on embedded platform,on the other hand to solve the problem that is inefficient and heavy overhead in thespecial topology of the traditional transmission scheduling algorithm.3. We design and implement the algorithm in the application of network simulationfor higher requirements of real-time, complex of the mesh-star hybrid networktopology structure. Build a simulated network based on MATLAB simulationplatform. Simulation experiments and comparative analysis show that thisalgorithm is not only low time overhead of algorithm, and get an ideal networkthroughput.