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After the 2004 earthquake in Japan’sNiigata Prefecture, there were many difficulties finding the victims. The earthquake caused a wired network disconnection. In addition,
fixed-phone and cell-phone service systems crashed due to the rapid increase in the volume of communications. The systems’
collapse was due to the large number of users who were worried about the safety of their relatives. The same situation happened
during Hurricane Katrina in the USA. Reflecting on these situations, the Japanese Ministry of Internal Affairs and Communications
is trying to adopt several methods to correct these communications problems. Although these methods have not been disclosed
precisely yet, we think that a predominant goal of one of the methods is most likely to find victims using RFIDs (Radio Frequency
Identification) with computer sensors. To do this, the RFID method would have to be incorporated in the following ways: 1)
by scattering sensor devices from helicopters when a large-scale disaster such as an earthquake occurs, 2) by making RFIDs
self-organized into a network, and 3) by making the self-organized network pinpoint the position of victims. A certain amount
of field-testing may be necessary to confirm the effects of this plan. However, such testing requires a great amount of time
and high costs. Therefore, we adopt an agent-based simulation for such a test. In this paper, we pay specific attention to
a simple and assured algorithm for discovering victims using RFIDs. First, we explain our method to confirm the location of
victims. Second, we explain our method for pinpointing the position of victims using trilateration. Finally, we present our
simulation results. 相似文献
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