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《Transactions of the Chinese Society for Agricultural Machinery》 2010-07
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Event-driven Scheduler in Monitoring and Controlling System for Greenhouse Based on Wireless Sensor Networks

Han Antai1 Guo Xiaohua2 Sun Yanwei1(1.Institute of Electrical Engineering and Electronic Technology,China Jiliang University,Hangzhou 310018,China2.Fair Friend Institute of Electromechanics,Hangzhou Vocational and Technical College,Hangzhou 310018,China)  
In order to reduce the adverse impact of network time-varying delay,packet loss,network congestion,jitter and other properties on performance of the monitoring and controlling system for greenhouse environment based on wireless sensor networks,the event-driven feedback scheduling strategy was proposed.The basic idea of the proposed event-driven feedback scheduling strategy was to use deadline miss ratio as the indicator for the network quality of service,adjust the sampling period of each sensor nodes by means of feedback control technology at run time such that the bandwidth requirement of each sensor nodes could adapt the change of the network workload,and the quality of network service could be maintained at a certain level.The novel event-driven invocation mechanism for the feedback scheduler was adopted to reduce the design difficulty and overhead of the feedback scheduler.Experiments indicated the proposed event-driven feedback scheduling strategy was with rationality,effectiveness and practicability.
【Fund】: 浙江省自然科学基金资助项目(Y1080072)
【CateGory Index】: S625
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