抄録
Intelligent container system is the state-of-the-art container system which prevents danger beforehand by monitoring status of freight inside the container in real time, and warns the danger immediately when danger is detected. Network device installed in each container is composed of low-power MCU and RF chip, and delivers information of container in accordance with the IEEE 802.15.4. It has the advantage of operating on low-power, but there is a limit in transmitting data due to small transmission frame, and transmission rate falls down in case of being used in a Wi-Fi environment of port. In order to solve this problem, this paper suggests network device which operates with low current by using TinyOS, and uses the communication method selected between Wi-Fi communication and IEEE 802.15.4 communication according to the environment of communication.
