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Study on the Sensor MAC Protocol for Environment Monitoring of Livestock Farm

Because the WSN has an extremely limited feature for storage and power supply capability, there is a problem that batteries of sensor nodes are frequently replaced and recharged. This paper suggests the event-driven CBMAC protocol for improving the battery consumption problem in such a sensor network. The suggested CBMAC exploits an event technique to reduce the traffic increase by proposing data collection at the certain interval when an event is arisen, and adjusts the sleep interval variably to lower consumption of the LPL. In order to test performance of the CBMAC, it applied the CBMAC into the livestock farm monitoring system to analyze breeding conditions of livestock and environmental information and to create an event table, and exploited MATLAB software to carry out simulations for evaluating the performance. As a result of the simulation, it could be found that the suggested CBMAC had improved the transmit/receive power of sensors by up to 40%, and the LPL consumption energy by about 25% compared to the B-MAC when events were arisen.