Research On The Self-adapting Networking And Transmission Mechanism Method Of Wireless Sensor Networks Communication Of Mine

Wireless-sensor-network technology is widely used in many fields, such as mine environmental monitoring, message transportation and mobile location and other fields. As one focus of the current researches, research for networking problem is the prerequisite and foundation to study mine wireless sensor network. And research for the method of transmission mechanism is a necessary mean to achieve energy-saving, efficient and reliable communication. Both the networking solutions for wireless-sensor-networks and transmission mechanism which are now existed can not meet the special ambient and high dynamic topology of roadway under the mine. Aiming to special underground environment, we should improve MAC layer protocols for wireless-sensor-networks and improve routing layer protocols respectively, the energy consumption of mobile nodes should be reduced in the network of mine, and its time-delaying character and reliability has to be improved as well.Work as follows:1. Considering the environmental characteristics of mine wireless-sensor-networks, the analysis and study of the need of mine’s signal transmission should choose the Mesh topology for network topologies to build mine’s safety monitoring. Suitable zigbee protocol should be used as the mine safety monitoring for wireless-sensor-networks.2. Considering the special circumstances of the mine and the mobile monitoring nodes underground, the analysis is made to interpret the adaptive network’s designing requirements of mine’s wireless-sensor-network. A dynamic clustering routing policy should be proposed on basis of an improved adaptation to the mine in the LEACH routing protocol. Through an improvement of cluster heads selection principle, a priority-based cluster networking strategy is proposed to widen network coverage, thus to reduce energy loss and communication delay caused by frequent access to the mobile node cluster caused.3. As regard to the environmental features of the mobile wireless-sensor-networks in special underground-mine-roadway capacity, an improved MAC protocol is raised to forecast receiving nodes’transmission time based on the EQ-MAC protocol which can reduce the idle listening time of sending node; an improved short-competitive pack of CTS/RTS is introduced, and in the premise of avoiding receiving node packet collisions, the control overhead should be cut as little as possible to reduce the failure of packet’s transmission and energy’s waste caused by retransmission.4. The MATLAB simulation platform is built to simulate mine tunnel experiment. The results of the simulation shows that:the improved solutions of adaptive networking and MAC transmission mechanism can reduce communication latency effectively, improve communication reliability, reduce energy consumption and is better adapt to the mobile network and transmission of mine wireless-sensor-network nodes.