Design And Implementation Of Internet And Mine WSN Interconnected System

Internet constitutes a logical world of information and changes the way of communication between people. Internet denotes Ethernet in this paper. Wireless sensor networks, which is referred to as WSN, is a kind of latest network system that is oriented on the special applications and is based on Sensor Technology. It introjects the logical world of information and the objective world of physical that changes means of communication between the human being and the nature. People can directly perceive the objective world by sensors. So it is greatly expanding the capabilities of existing networks. The blending of Internet and WSN has gradually become a necessity. Under the circumstances, this paper has completed the following research work.Firstly, we introduce the progress of the development of industrial Internet of wireless sensor networks inside and outside the country and the significance of the implementation in the mine particular environment. Secondly, we analyze three patterns concerning Internet Connectivity of wireless sensor networks. On these bases, we design the structure of the interconnected system and the workflow. And then we illustrate the realization of the software and the hardware of the interconnected gateway and the super-computer management software. At the end, Aiming at the actual requirement of the system of industrial Ethernet connectivity of wireless sensor networks in underground coal mine, a dynamic priority scheduling algorithm which is applied in the interconnected gateway is presented. The algorithm can avoid the occurrence of the congestion in the interconnected system. Simulation results show that packet loss rate is controlled within 7 to 15%, service response time is controlled within 2.8~7s and average queue length is stable when the interconnected system is three times than the maximum load. However, when the load of the interconnected system has returned to normal, the gateway enters the steady state that packet loss rate is zero only after 6s. Through these above parts, the algorithm is proved to be feasible by above.