An IEEE802.15.4-Based System for Locating Children on Their School Commutes

作者：Sugiura Akihiko^*; Baba Ryoichi; Kobayashi Hideyuki

来源：IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences, 2010, E93A(5): 950-957.

DOI：10.1587/transfun.E93.A.950

• IEEE802.15.4
• locating
• school commutes
• zigbee
• FDMA

With the increasing number of crimes and accidents in which children are becoming involved, there is a growing demand for devices to safeguard children's security by detecting their locations on their way to and from school. This paper proposes a system that uses an IEEE802.15.4-standard network to detect children's locations. To overcome the susceptibility of radio interference from nearby wireless LANs, frequency division multiplexing is applied to this IEEE802.15.4-based network, toward improving data acquisition from terminal units. The effectiveness of the system was field-tested with elementary school students who used about 400 IEEE 802.15.4-compliant terminal units. An experiment verified that the use of frequency division multiplexing in an environment where radio interference by wireless LANs is strong allowed the network to double the success rate of information communication from terminal units relative to that without frequency division multiplexing. In the experiment for detecting elementary schoolers' arrival at and departure from school, the terminal detection rate was 99% and the terminal detection rate on the designated school routes was 90%. These results prove the effectiveness of the system in detecting locations.

• 出版日期2010-5