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The Simulation Research on Dynamic Priority Scheduling for Wireless Networked Control System

Author: ChangYiLin
Tutor: YuHaiChen
School: Dalian University of Technology
Course: Control Theory and Control Engineering
Keywords: Wireless network control system IEEE 802.15.4 Scheduling policy Dynamic priority
CLC: TP273
Type: Master's thesis
Year: 2011
Downloads: 24
Quote: 0
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Abstract


Wireless network control system (Wireless Networked Control System, WNCS) has high integration , flexibility , wiring and installation costs low . However , due to the the WNCS existing network-induced delay , packet loss , dynamic link characteristics , time-varying channel gain and interference , network bandwidth is limited , the the WNCS analysis and design more complex. In recent years WNCS the stability analysis , control strategy , network protocol optimization problems, has become a hot research . By improving the quality of service of the network , reduce packet delay and loss , and thus provide a stable network environment for wireless network control system , is a key issue in the wireless network control system . In network protocols , scheduling policy has a direct impact on the real - time and effectiveness of wireless networks , thereby affecting the performance of the wireless network control system control . This paper presents a dynamic priority scheduling policy to ensure fair access to the network nodes and to slightly increase the cost of packet delay reduces the probability of packet loss , which provide efficient wireless network services for wireless network control system . The IEEE 802.15.4 protocol is a wireless network protocol standard , the agreement proposed by the IEEE for the use of low - power and low transmission rate environment by setting the parameters of the MAC layer network , very flexible to adapt to a variety of network requirements of different occasions , but based on the IEEE 802.15.4 protocol wireless network to a large number of packets lost in the network is busy . IEEE 802.15.4 protocol as the network protocol research object , the agreement rush cases delay and packet loss issues . Analysis and experimental results show that the agreement to reduce the packet loss , can well meet the requirements of the wireless network control systems for network services .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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