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Distributed Cooperative Frequency Management Schemes for Industrial Wireless Sensor Networks

Author: Yuan
Tutor: WangZuoRong
School: Huazhong University of Science and Technology
Course: Communication and Information System
Keywords: Industrial wireless sensor networks Frequency Management Hybrid Spread Spectrum Adaptive Frequency Hopping
CLC: TN915.07
Type: Master's thesis
Year: 2008
Downloads: 107
Quote: 1
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Abstract


Industrial wireless technology to meet the high reliability industrial applications, low-power, hard real-time and other special needs of a special class of wireless sensor network technology. Wireless communication into trends in the field of industrial control Undoubtedly, how reliable wireless sensor network applications in the field of industrial control, is one of the important research content. Mainly for the interference caused by the complex RF environment in the industrial field of wireless communications, with existing mainstream short-range wireless protocol, a direct sequence spread spectrum frequency hopping spread spectrum advantages of hybrid spread spectrum technology, based on the technology constitute a distributed collaborative dynamic frequency management technology to improve industrial wireless sensor networks and coexistence with other wireless networks, interference immunity to ensure the reliability of industrial wireless sensor network communication. First, the summary of the existing industrial applications in short-range wireless network technology, the method works in the frequency management, key technology and network structure, given a distributed industrial wireless sensor network structure. An effective frame structure proposed industrial wireless sensor networks can better uniform allocation of frequency resources of the network, scheduling and management. Secondly, a detailed analysis of the challenges facing high reliable transmission using wireless communication in the industrial field, including the impact of factory equipment for the wireless transmission path, and interference from other wireless devices. And pointed out that the physical layer of wireless sensor network for distributed industrial technology for the above industrial wireless sensor networks in the presence of noise and interference, spread spectrum methods to improve communication reliability. Briefly the basic principles of spread spectrum communication, direct sequence spread spectrum / frequency hopping spread spectrum hybrid spread spectrum communication system model to study the direct sequence spread spectrum and slow frequency hopping and other key technologies, and discusses the characterization of the two important parameters of the kinds of anti-interference ability of key technologies, and distributed the collaborative dynamic frequency management system is based on the hybrid spread spectrum communication system. Determine the relevant performance parameters, the analysis of the reliability of the distributed collaborative dynamic frequency management system should have communication, design the structure of the simulation system. Eventually confirmed based on a different channel and noise models distributed collaboration frequency communication system has a direct sequence spread spectrum technology is superior based on IEEE 802.15.4 communication reliability. Finally, the frequency management framework for distributed industrial wireless sensor networks, adaptive frequency hopping algorithm introduced in direct sequence spread spectrum / frequency hopping spread spectrum hybrid spread spectrum communication system, to overcome the conventional frequency hopping systems \The Distributed Collaborative adaptive frequency management algorithm can be provided in the communication process to automatically avoid interference hopping frequency, thereby to maintain the quality of communication for a long period of time without interference channel, and ultimately the sensor node frequency allocation. Adaptive frequency hopping technology, anti-jamming performance analysis and comparison.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication network > General issues > Network management
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