The Research of Energy Efficient MAC Protocols in Gas Monitoring System of Mine

In recent years, coal mine accidents have happened frequently in our country. These bring high casualties and huge economic losses, and ring the alarm bell for our coal industry. The traditional coal mine gas monitoring system uses the method of wire network, because of the restriction of time and space flexibility in the wire network, it is impossible to build a wire system in short time. For real-time and unmanned guard monitoring the concentration of gas and lowering the potential safety hazard of mine, we design a gas monitoring system based on wireless sensor network. In this thesis, we analyze the energy efficiency of MAC protocols of this system, compare S-MAC protocol with T-MAC protocol, and research their working principles. Aiming at the energy efficiency, we establish the mathematical model and do the simulation with NS-2. The results of simulation illustrate that in the same condition T-MAC protocol consumes less energy and it can satisfy the latency of communication.