A Data Gathering Method Considering Volume of Transmission Range for Fish Farm Monitoring

One of the promising sensor network application is for the primary industry and we have proposed a fish farm monitoring system. In our system, sensor data monitored at a fish-mounted sensor node is transmitted to a sink node by using acoustic communication. Since we assume that a sensor node is attached at an abdominal cavity region of fish, the transmission range of acoustic wave is not omni-directional due to obstruction of fish body. In addition, energy efficient control is highly important in our system since it is difficult to replace battery of sensor node. In this paper, we propose a data gathering method taking into account energy efficiency and directional transmission range. In our method, we use the volume of transmission range to determine the timing of packet transmission. Our method does not require control packets for determining its transmission timing. Through simulation evaluations, we show that the data gathering performance of our proposed method is higher than that of comparative methods.