An Effect of Sharing Damaged Road Information via Heterogeneous DTN on Evacuation
An Effect of Sharing Damaged Road Information via Heterogeneous DTN on Evacuation
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DOI：
10.1145/3427477.3428192
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发表时间：
2020-12
期刊：
影响因子：
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通讯作者：
Yudai Yahara;Arata Kato;M. Takai;S. Ishihara
中科院分区：
文献类型：
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作者：
Yudai Yahara;Arata Kato;M. Takai;S. Ishihara
分享受损道路的信息是灾害疏散的一个关键问题。我们的目标是开发一个异构的DTN为基础的灾害信息共享系统，它既使用短距离宽带媒体（例如，Wi-Fi）和长距离窄带媒体（例如，LoRa）共享灾害信息，即使通信基础设施遭到破坏。在该系统中，疏散人员携带Wi-Fi移动终端，灾害总部的固定中继节点和设备配备Wi-Fi和LoRa。我们使用基于元胞自动机的移动和通信仿真模型研究了DTN对疏散人员行为的影响。研究结果表明，在疏散过程中会出现“留守现象”，即掌握受损道路信息的疏散人员（先到者）在未获得受损道路信息的疏散人员（后到者）到达受损道路附近之前离开受损道路。根据仿真结果，我们还推导出了一种避免遗留现象的固定中继节点有效放置策略，并证实了该策略的有效性。
Sharing the information on damaged roads is a critical matter in disaster evacuation. We aim to develop a heterogeneous DTN based-disaster information sharing system, which uses both short-range wideband media (e.g., Wi-Fi) and long-range narrowband media (e.g., LoRa) to share disaster information even if communication infrastructures are damaged. In the system, evacuees carry a Wi-Fi mobile device, and fixed relay nodes and devices at disaster headquarters are equipped with Wi-Fi and LoRa. We investigated the influence of the DTN on evacuees’ behavior by using the cellular automaton-based mobility and communication simulation model. The results show that “leaving behind phenomena”, in which evacuees who hold the damaged road information (early comers) leave the damaged road before evacuees who have not obtained the damaged road information (latecomers) come to the vicinity of the damaged road occur. We also derived a strategy for the effective placement of fixed relay nodes to avoid leaving behind phenomena based on the simulation results and confirmed the strategy’s effectiveness.