A dynamic MAC protocol for wireless sensor network based network traffic monitoring and feedback

Yang Xianhui, Ren Honge, Jing Weipeng

COMPUTER MODELLING & NEW TECHNOLOGIES 2014 18(2) 107-113

The College of Information and Computer Engineering, Northeast Forestry University, Harbin 150040, China

WSN application in coal mine gas monitoring protects safety production. In order to save energy consumption, SMAC use periodic listen and sleep mechanism, against the problem of fixed duty cycle causes increased delay, this paper puts forward a new MAC protocol—DSMAC(Dynamic SMAC)which can feedback the channel’s congestion level reasonably and adjust the duty cycle dynamically. The dominant idea of the new scheme is to record the packet amounts in the sending stage by sensor nodes, and according to the packet sending rate every sensor node can change its listening time adaptively when synchronization cycle finished to minimize delay and collisions, saving energy and channel resources. The result of simulation shows that compared with other MAC protocols, the DSMAC protocol can improve network throughput and reduce energy consumption in coal mine gas monitoring environment.